app/Http/Controllers/GradeController.php

@@ -11,8 +11,9 @@ use Illuminate\View\View;
 class GradeController extends Controller
 {
     public function __construct(
-        protected ServiceInterface $gradeService,
-    ){}
+        protected ServiceInterface $service,
+    ) {
+    }
 
     /**
      * Display a listing of the resource.
@@ -20,7 +21,7 @@ class GradeController extends Controller
     public function index(): View
     {
         return view('grades.index', [
-            'grades' => $this->gradeService->getAll(),
+            'grades' => $this->service->getAll(),
         ]);
     }
 
@@ -37,7 +38,7 @@ class GradeController extends Controller
      */
     public function store(GradePostRequest $request): RedirectResponse
     {
-        return redirect()->route('grades.show', $this->gradeService->create($request->validated()));
+        return redirect()->route('grades.show', $this->service->create($request->validated()));
     }
 
     /**
@@ -47,6 +48,7 @@ class GradeController extends Controller
     {
         return view('grades.show', [
             'grade' => $grade,
+            'subjects' => $grade->subjects,
         ]);
     }
 
@@ -65,7 +67,7 @@ class GradeController extends Controller
      */
     public function update(GradePostRequest $request, Grade $grade): RedirectResponse
     {
-        return redirect()->route('grades.show', $this->gradeService->update($grade, $request->validated()));
+        return redirect()->route('grades.show', $this->service->update($grade, $request->validated()));
     }
 
     /**
@@ -73,7 +75,7 @@ class GradeController extends Controller
      */
     public function destroy(Grade $grade): RedirectResponse
     {
-        $this->gradeService->delete($grade);
+        $this->service->delete($grade);
 
         return redirect()->route('grades.index');
     }

app/Http/Controllers/GradeSubjectController.php

@@ -0,0 +1,51 @@
+<?php
+
+namespace App\Http\Controllers;
+
+use App\Http\Requests\GradeSubjectPostRequest;
+use App\Models\Grade;
+use App\Models\Subject;
+use App\Services\ServiceInterface;
+use Illuminate\Http\RedirectResponse;
+use Illuminate\View\View;
+
+class GradeSubjectController extends Controller
+{
+    public function __construct(
+        protected ServiceInterface $service,
+    ) {
+    }
+
+    public function create(Grade $grade): View
+    {
+        return view('grade-subject.create', [
+            'grade' => $grade,
+            'subjects' => $this->service->getAllSubjects(),
+        ]);
+    }
+
+    public function store(GradeSubjectPostRequest $request, Grade $grade): RedirectResponse
+    {
+        return redirect()->route('grades.show', $this->service->create($request->validated(), $grade));
+    }
+
+    public function edit(Grade $grade, Subject $subject): View
+    {
+        return view('grade-subject.edit', [
+            'grade' => $grade,
+            'updateSubject' => $subject,
+            'subjects' => $this->service->getAllSubjects(),
+        ]);
+    }
+
+    public function update(GradeSubjectPostRequest $request, Grade $grade, Subject $subject): RedirectResponse
+    {
+        return redirect()->route('grades.show',
+            $this->service->update($grade, $request->validated(), $subject));
+    }
+
+    public function destroy(Grade $grade, Subject $subject): RedirectResponse
+    {
+        return redirect()->route('grades.show', $this->service->delete($grade, $subject));
+    }
+}

app/Http/Controllers/GradeTeacherController.php

@@ -0,0 +1,62 @@
+<?php
+
+namespace App\Http\Controllers;
+
+use App\Http\Requests\GradeTeacherPostRequest;
+use App\Models\Grade;
+use App\Models\Subject;
+use App\Models\Teacher;
+use App\Services\ServiceInterface;
+use Illuminate\Http\RedirectResponse;
+use Illuminate\View\View;
+
+class GradeTeacherController extends Controller
+{
+    public function __construct(
+        protected ServiceInterface $service,
+    ) {
+    }
+
+    public function create(Teacher $teacher, Subject $subject): View
+    {
+        return view('grade-teacher.create', [
+            'teacher' => $teacher,
+            'subject' => $subject,
+            'grades' => $this->service->getGrades($subject),
+        ]);
+    }
+
+    public function store(GradeTeacherPostRequest $request, Teacher $teacher, Subject $subject): RedirectResponse
+    {
+        return redirect()->route('teachers.subjects.show', [
+            $this->service->create($request->validated(), $teacher),
+            $subject,
+        ]);
+    }
+
+    public function edit(Teacher $teacher, Subject $subject, Grade $grade): View
+    {
+        return view('grade-teacher.edit', [
+            'teacher' => $teacher,
+            'subject' => $subject,
+            'updateGrade' => $grade,
+            'grades' => $this->service->getGrades($subject),
+        ]);
+    }
+
+    public function update(GradeTeacherPostRequest $request, Teacher $teacher, Subject $subject, Grade $grade): RedirectResponse
+    {
+        return redirect()->route('teachers.subjects.show', [
+            $this->service->update($teacher, $request->validated(), $grade),
+            $subject,
+        ]);
+    }
+
+    public function destroy(Teacher $teacher, Subject $subject, Grade $grade): RedirectResponse
+    {
+        return redirect()->route('teachers.subjects.show', [
+            $this->service->delete($teacher, $grade),
+            $subject,
+        ]);
+    }
+}

app/Http/Controllers/StudentController.php

@@ -12,8 +12,9 @@ use Illuminate\View\View;
 class StudentController extends Controller
 {
     public function __construct(
-        protected ServiceInterface $studentService
-    ){}
+        protected ServiceInterface $service
+    ) {
+    }
 
     /**
      * Display a listing of the resource.
@@ -21,7 +22,7 @@ class StudentController extends Controller
     public function index(): View
     {
         return view('students.index', [
-            'students' => $this->studentService->getAll(),
+            'students' => $this->service->getAll(),
         ]);
     }
 
@@ -42,7 +43,7 @@ class StudentController extends Controller
     {
         return redirect()->route(
             'students.show',
-            $this->studentService->create($request->validated())
+            $this->service->create($request->validated())
         );
     }
 
@@ -75,7 +76,7 @@ class StudentController extends Controller
     {
         return redirect()->route(
             'students.show',
-            $this->studentService->update($student, $request->validated())
+            $this->service->update($student, $request->validated())
         );
     }
 
@@ -84,7 +85,7 @@ class StudentController extends Controller
      */
     public function destroy(Student $student): RedirectResponse
     {
-        $this->studentService->delete($student);
+        $this->service->delete($student);
 
         return redirect()->route('students.index');
     }

app/Http/Controllers/SubjectController.php

@@ -11,8 +11,9 @@ use Illuminate\View\View;
 class SubjectController extends Controller
 {
     public function __construct(
-        protected ServiceInterface $subjectService,
-    ){}
+        protected ServiceInterface $service,
+    ) {
+    }
 
     /**
      * Display a listing of the resource.
@@ -20,7 +21,7 @@ class SubjectController extends Controller
     public function index(): View
     {
         return view('subjects.index', [
-            "subjects" => $this->subjectService->getAll(),
+            'subjects' => $this->service->getAll(),
         ]);
     }
 
@@ -39,7 +40,7 @@ class SubjectController extends Controller
     {
         return redirect()->route(
             'subjects.show',
-            $this->subjectService->create($request->validated())
+            $this->service->create($request->validated())
         );
     }
 
@@ -49,7 +50,7 @@ class SubjectController extends Controller
     public function show(Subject $subject): View
     {
         return view('subjects.show', [
-            "subject" => $subject
+            'subject' => $subject,
         ]);
     }
 
@@ -70,7 +71,7 @@ class SubjectController extends Controller
     {
         return redirect()->route(
             'subjects.show',
-            $this->subjectService->update($subject, $request->validated())
+            $this->service->update($subject, $request->validated())
         );
     }
 
@@ -79,7 +80,7 @@ class SubjectController extends Controller
      */
     public function destroy(Subject $subject): RedirectResponse
     {
-        $this->subjectService->delete($subject);
+        $this->service->delete($subject);
 
         return redirect()->route('subjects.index');
     }

app/Http/Controllers/SubjectTeacherController.php

@@ -0,0 +1,60 @@
+<?php
+
+namespace App\Http\Controllers;
+
+use App\Http\Requests\SubjectTeacherPostRequest;
+use App\Models\Subject;
+use App\Models\Teacher;
+use App\Services\ServiceInterface;
+use Illuminate\Http\RedirectResponse;
+use Illuminate\View\View;
+
+class SubjectTeacherController extends Controller
+{
+    public function __construct(
+        protected ServiceInterface $service,
+    ) {
+    }
+
+    public function create(Teacher $teacher): View
+    {
+        return view('subject-teacher.create', [
+            'teacher' => $teacher,
+            'subjects' => $this->service->getAllSubjects(),
+        ]);
+    }
+
+    public function store(SubjectTeacherPostRequest $request, Teacher $teacher): RedirectResponse
+    {
+        return redirect()->route('teachers.show', $this->service->create($request->validated(), $teacher));
+    }
+
+    public function show(Teacher $teacher, Subject $subject): View
+    {
+        return view('subject-teacher.show', [
+            'teacher' => $teacher,
+            'subject' => $subject,
+            'grades' => $this->service->getGrades($teacher, $subject),
+        ]);
+    }
+
+    public function edit(Teacher $teacher, Subject $subject): View
+    {
+        return view('subject-teacher.edit', [
+            'teacher' => $teacher,
+            'updateSubject' => $subject,
+            'subjects' => $this->service->getAllSubjects(),
+        ]);
+    }
+
+    public function update(SubjectTeacherPostRequest $request, Teacher $teacher, Subject $subject): RedirectResponse
+    {
+        return redirect()->route('teachers.show',
+            $this->service->update($teacher, $request->validated(), $subject));
+    }
+
+    public function destroy(Teacher $teacher, Subject $subject): RedirectResponse
+    {
+        return redirect()->route('teachers.show', $this->service->delete($teacher, $subject));
+    }
+}

app/Http/Controllers/TeacherController.php

@@ -11,8 +11,9 @@ use Illuminate\View\View;
 class TeacherController extends Controller
 {
     public function __construct(
-        protected ServiceInterface $teacherService
-    ){}
+        protected ServiceInterface $service
+    ) {
+    }
 
     /**
      * Display a listing of the resource.
@@ -20,7 +21,7 @@ class TeacherController extends Controller
     public function index(): View
     {
         return view('teachers.index', [
-            'teachers' => $this->teacherService->getAll(),
+            'teachers' => $this->service->getAll(),
         ]);
     }
 
@@ -39,7 +40,7 @@ class TeacherController extends Controller
     {
         return redirect()->route(
             'teachers.show',
-            $this->teacherService->create($request->validated())
+            $this->service->create($request->validated())
         );
     }
 
@@ -50,6 +51,7 @@ class TeacherController extends Controller
     {
         return view('teachers.show', [
             'teacher' => $teacher,
+            'subjects' => $teacher->subjects,
         ]);
     }
 
@@ -70,7 +72,7 @@ class TeacherController extends Controller
     {
         return redirect()->route(
             'teachers.show',
-            $this->teacherService->update($teacher, $request->validated())
+            $this->service->update($teacher, $request->validated())
         );
     }
 
@@ -79,7 +81,7 @@ class TeacherController extends Controller
      */
     public function destroy(Teacher $teacher): RedirectResponse
     {
-        $this->teacherService->delete($teacher);
+        $this->service->delete($teacher);
 
         return redirect()->route('teachers.index');
     }

app/Http/Requests/GradeSubjectPostRequest.php

@@ -0,0 +1,28 @@
+<?php
+
+namespace App\Http\Requests;
+
+use Illuminate\Foundation\Http\FormRequest;
+
+class GradeSubjectPostRequest extends FormRequest
+{
+    /**
+     * Determine if the user is authorized to make this request.
+     */
+    public function authorize(): bool
+    {
+        return true;
+    }
+
+    /**
+     * Get the validation rules that apply to the request.
+     *
+     * @return array<string, \Illuminate\Contracts\Validation\ValidationRule|array<mixed>|string>
+     */
+    public function rules(): array
+    {
+        return [
+            'subject_id' => 'required|exists:subjects,id',
+        ];
+    }
+}

app/Http/Requests/GradeTeacherPostRequest.php

@@ -0,0 +1,28 @@
+<?php
+
+namespace App\Http\Requests;
+
+use Illuminate\Foundation\Http\FormRequest;
+
+class GradeTeacherPostRequest extends FormRequest
+{
+    /**
+     * Determine if the user is authorized to make this request.
+     */
+    public function authorize(): bool
+    {
+        return true;
+    }
+
+    /**
+     * Get the validation rules that apply to the request.
+     *
+     * @return array<string, \Illuminate\Contracts\Validation\ValidationRule|array<mixed>|string>
+     */
+    public function rules(): array
+    {
+        return [
+            'grade_id' => 'required|exists:grades,id',
+        ];
+    }
+}

app/Http/Requests/StudentPostRequest.php

@@ -2,8 +2,6 @@
 
 namespace App\Http\Requests;
 
-use App\Enums\RoleEnum;
-use Illuminate\Contracts\Validation\ValidationRule;
 use Illuminate\Foundation\Http\FormRequest;
 
 class StudentPostRequest extends FormRequest

app/Http/Requests/SubjectPostRequest.php

@@ -22,7 +22,7 @@ class SubjectPostRequest extends FormRequest
     public function rules(): array
     {
         return [
-            'name' => 'required|unique:grades|max:255',
+            'name' => 'required|unique:subjects|max:255',
         ];
     }
 }

app/Http/Requests/SubjectTeacherPostRequest.php

@@ -0,0 +1,28 @@
+<?php
+
+namespace App\Http\Requests;
+
+use Illuminate\Foundation\Http\FormRequest;
+
+class SubjectTeacherPostRequest extends FormRequest
+{
+    /**
+     * Determine if the user is authorized to make this request.
+     */
+    public function authorize(): bool
+    {
+        return true;
+    }
+
+    /**
+     * Get the validation rules that apply to the request.
+     *
+     * @return array<string, \Illuminate\Contracts\Validation\ValidationRule|array<mixed>|string>
+     */
+    public function rules(): array
+    {
+        return [
+            'subject_id' => 'required|exists:subjects,id',
+        ];
+    }
+}

app/Http/Requests/TeacherPostRequest.php

@@ -2,8 +2,6 @@
 
 namespace App\Http\Requests;
 
-use App\Enums\RoleEnum;
-use Illuminate\Contracts\Validation\ValidationRule;
 use Illuminate\Foundation\Http\FormRequest;
 
 class TeacherPostRequest extends FormRequest

app/Models/Student.php

@@ -2,12 +2,13 @@
 
 namespace App\Models;
 
+use Illuminate\Database\Eloquent\Builder;
 use Illuminate\Database\Eloquent\Casts\Attribute;
 use Illuminate\Database\Eloquent\Factories\HasFactory;
 use Illuminate\Database\Eloquent\Model;
 use Illuminate\Database\Eloquent\Relations\BelongsTo;
 use Illuminate\Database\Eloquent\Relations\MorphOne;
-use Illuminate\Database\Eloquent\Builder;
+
 class Student extends Model
 {
     use HasFactory;
@@ -33,7 +34,7 @@ class Student extends Model
     public function scopeFilter(Builder $query): void
     {
         $name = request('name');
-        $query->when($name, function (Builder $query, $name){
+        $query->when($name, function (Builder $query, $name) {
             $query->whereRaw('CONCAT (name, \' \', surname, \' \', patronymic) ilike ?', ["$name%"]);
             $query->orWhereRaw('CONCAT (name, \' \', patronymic, \' \', surname) ilike ?', ["$name%"]);
             $query->orWhereRaw('CONCAT (surname, \' \', name, \' \', patronymic) ilike ?', ["$name%"]);
@@ -46,7 +47,7 @@ class Student extends Model
     public function fio(): Attribute
     {
         return Attribute::make(
-            get: fn () => $this->last_name . " " . $this->name . " " . $this->middle_name,
+            get: fn () => $this->last_name.' '.$this->name.' '.$this->middle_name,
         );
     }
 }

app/Models/Teacher.php

@@ -2,12 +2,13 @@
 
 namespace App\Models;
 
+use Illuminate\Database\Eloquent\Builder;
 use Illuminate\Database\Eloquent\Casts\Attribute;
 use Illuminate\Database\Eloquent\Factories\HasFactory;
 use Illuminate\Database\Eloquent\Model;
 use Illuminate\Database\Eloquent\Relations\BelongsToMany;
 use Illuminate\Database\Eloquent\Relations\MorphOne;
-use Illuminate\Database\Eloquent\Builder;
+
 class Teacher extends Model
 {
     use HasFactory;
@@ -37,7 +38,7 @@ class Teacher extends Model
     public function scopeFilter(Builder $query): void
     {
         $name = request('name');
-        $query->when($name, function (Builder $query, $name){
+        $query->when($name, function (Builder $query, $name) {
             $query->whereRaw('CONCAT (name, \' \', surname, \' \', patronymic) ilike ?', ["$name%"]);
             $query->orWhereRaw('CONCAT (name, \' \', patronymic, \' \', surname) ilike ?', ["$name%"]);
             $query->orWhereRaw('CONCAT (surname, \' \', name, \' \', patronymic) ilike ?', ["$name%"]);
@@ -50,7 +51,7 @@ class Teacher extends Model
     public function fio(): Attribute
     {
         return Attribute::make(
-            get: fn () => $this->last_name . " " . $this->name . " " . $this->middle_name,
+            get: fn () => $this->last_name.' '.$this->name.' '.$this->middle_name,
         );
     }
 }

app/Providers/ModelServiceProvider.php

@@ -3,13 +3,19 @@
 namespace App\Providers;
 
 use App\Http\Controllers\GradeController;
+use App\Http\Controllers\GradeSubjectController;
+use App\Http\Controllers\GradeTeacherController;
 use App\Http\Controllers\StudentController;
 use App\Http\Controllers\SubjectController;
+use App\Http\Controllers\SubjectTeacherController;
 use App\Http\Controllers\TeacherController;
 use App\Services\GradeService;
+use App\Services\GradeSubjectService;
+use App\Services\GradeTeacherService;
 use App\Services\ServiceInterface;
 use App\Services\StudentService;
 use App\Services\SubjectService;
+use App\Services\SubjectTeacherService;
 use App\Services\TeacherService;
 use Illuminate\Support\ServiceProvider;
 
@@ -43,6 +49,24 @@ class ModelServiceProvider extends ServiceProvider
             ->give(function () {
                 return new SubjectService();
             });
+
+        $this->app->when(SubjectTeacherController::class)
+            ->needs(ServiceInterface::class)
+            ->give(function () {
+                return new SubjectTeacherService();
+            });
+
+        $this->app->when(GradeSubjectController::class)
+            ->needs(ServiceInterface::class)
+            ->give(function () {
+                return new GradeSubjectService();
+            });
+
+        $this->app->when(GradeTeacherController::class)
+            ->needs(ServiceInterface::class)
+            ->give(function () {
+                return new GradeTeacherService();
+            });
     }
 
     /**

app/Services/GradeService.php

@@ -3,14 +3,14 @@
 namespace App\Services;
 
 use App\Models\Grade;
+use Illuminate\Database\Eloquent\Model;
 use Illuminate\Pagination\LengthAwarePaginator;
 
 class GradeService implements ServiceInterface
 {
-
     public function getAll(): LengthAwarePaginator
     {
-        return Grade::filter()->paginate(10)->withQueryString();
+        return Grade::filter()->paginate(5)->withQueryString();
     }
 
     public function create(array $data): Grade
@@ -18,7 +18,7 @@ class GradeService implements ServiceInterface
         return Grade::create($data);
     }
 
-    public function update($model, array $data): Grade
+    public function update(Model $model, array $data): Grade
     {
         $model->update($data);
 

app/Services/GradeSubjectService.php

@@ -0,0 +1,43 @@
+<?php
+
+namespace App\Services;
+
+use App\Models\Grade;
+use App\Models\Subject;
+use Illuminate\Database\Eloquent\Collection;
+use Illuminate\Database\Eloquent\Model;
+
+class GradeSubjectService implements ServiceInterface
+{
+    public function getAll(?Grade $grade = null): Collection
+    {
+        return $grade->subjects;
+    }
+
+    public function getAllSubjects(): Collection
+    {
+        return Subject::all();
+    }
+
+    public function create(array $data, ?Model $model = null): Grade
+    {
+        $model->subjects()->syncWithoutDetaching($data['subject_id']);
+
+        return $model;
+    }
+
+    public function update(Model $model, array $data, ?Model $subject = null): Grade
+    {
+        $model->subjects()->detach($subject->id);
+        $model->subjects()->attach($data['subject_id']);
+
+        return $model;
+    }
+
+    public function delete(Model $model, ?Model $subject = null): Grade
+    {
+        $model->subjects()->detach($subject);
+
+        return $model;
+    }
+}

app/Services/GradeTeacherService.php

@@ -0,0 +1,47 @@
+<?php
+
+namespace App\Services;
+
+use App\Models\Subject;
+use App\Models\Teacher;
+use Illuminate\Database\Eloquent\Collection;
+use Illuminate\Database\Eloquent\Model;
+
+class GradeTeacherService implements ServiceInterface
+{
+    public function getAll(?Teacher $teacher = null, ?Subject $subject = null): Collection
+    {
+        return $teacher
+            ->grades()
+            ->join('grade_subject', 'grades.id', '=', 'grade_subject.grade_id')
+            ->where('subject_id', $subject->id)
+            ->get();
+    }
+
+    public function getGrades(Subject $subject): Collection
+    {
+        return $subject->grades;
+    }
+
+    public function create(array $data, ?Model $model = null): Teacher
+    {
+        $model->grades()->syncWithoutDetaching($data['grade_id']);
+
+        return $model;
+    }
+
+    public function update(Model $model, array $data, ?Model $grade = null): Teacher
+    {
+        $model->grades()->detach($grade->id);
+        $model->grades()->attach($data['grade_id']);
+
+        return $model;
+    }
+
+    public function delete(Model $model, ?Model $grade = null): Teacher
+    {
+        $model->grades()->detach($grade);
+
+        return $model;
+    }
+}

app/Services/ServiceInterface.php

@@ -2,13 +2,15 @@
 
 namespace App\Services;
 
+use Illuminate\Database\Eloquent\Model;
+
 interface ServiceInterface
 {
     public function getAll();
 
-    public function create(array $data);
+    public function create(array $data): Model;
 
-    public function update($model, array $data);
+    public function update(Model $model, array $data): Model;
 
-    public function delete($model);
+    public function delete(Model $model);
 }

app/Services/StudentService.php

@@ -3,7 +3,6 @@
 namespace App\Services;
 
 use App\Models\Student;
-use App\Models\Teacher;
 use App\Models\User;
 use Illuminate\Pagination\LengthAwarePaginator;
 
@@ -11,7 +10,7 @@ class StudentService implements ServiceInterface
 {
     public function getAll(): LengthAwarePaginator
     {
-        return Student::filter()->paginate(10)->withQueryString();
+        return Student::filter()->paginate(5)->withQueryString();
     }
 
     public function create(array $data): Student

app/Services/SubjectService.php

@@ -3,14 +3,14 @@
 namespace App\Services;
 
 use App\Models\Subject;
+use Illuminate\Database\Eloquent\Model;
 use Illuminate\Pagination\LengthAwarePaginator;
 
 class SubjectService implements ServiceInterface
 {
-
     public function getAll(): LengthAwarePaginator
     {
-        return Subject::filter()->paginate(10)->withQueryString();
+        return Subject::filter()->paginate(5)->withQueryString();
     }
 
     public function create(array $data): Subject
@@ -18,14 +18,14 @@ class SubjectService implements ServiceInterface
         return Subject::create($data);
     }
 
-    public function update($model, array $data): Subject
+    public function update(Model $model, array $data): Subject
     {
         $model->update($data);
 
         return $model;
     }
 
-    public function delete($model): void
+    public function delete(Model $model): void
     {
         $model->delete();
     }

app/Services/SubjectTeacherService.php

@@ -0,0 +1,51 @@
+<?php
+
+namespace App\Services;
+
+use App\Models\Subject;
+use App\Models\Teacher;
+use Illuminate\Database\Eloquent\Collection;
+use Illuminate\Database\Eloquent\Model;
+
+class SubjectTeacherService implements ServiceInterface
+{
+    public function getAll(?Teacher $teacher = null): Collection
+    {
+        return $teacher->subjects;
+    }
+
+    public function getAllSubjects(): Collection
+    {
+        return Subject::all();
+    }
+
+    public function getGrades(Teacher $teacher, Subject $subject): Collection
+    {
+        return $teacher
+            ->grades()
+            ->join('grade_subject', 'grades.id', '=', 'grade_subject.grade_id')
+            ->where('subject_id', $subject->id)->get();
+    }
+
+    public function create(array $data, ?Model $model = null): Teacher
+    {
+        $model->subjects()->syncWithoutDetaching($data['subject_id']);
+
+        return $model;
+    }
+
+    public function update(Model $model, array $data, ?Model $subject = null): Teacher
+    {
+        $model->subjects()->detach($subject->id);
+        $model->subjects()->attach($data['subject_id']);
+
+        return $model;
+    }
+
+    public function delete(Model $model, ?Model $subject = null): Teacher
+    {
+        $model->subjects()->detach($subject);
+
+        return $model;
+    }
+}

app/Services/TeacherService.php

@@ -2,7 +2,6 @@
 
 namespace App\Services;
 
-use App\Models\Student;
 use App\Models\Teacher;
 use App\Models\User;
 use Illuminate\Pagination\LengthAwarePaginator;
@@ -11,7 +10,7 @@ class TeacherService implements ServiceInterface
 {
     public function getAll(): LengthAwarePaginator
     {
-        return Teacher::filter()->paginate(2)->withQueryString();
+        return Teacher::filter()->paginate(5)->withQueryString();
     }
 
     public function create(array $data): Teacher

resources/views/grade-subject/create.blade.php

@@ -0,0 +1,5 @@
+@extends('layouts.app')
+
+@section('content')
+    @include('grade-subject.form', ['route' => route('grades.subjects.store', $grade), 'method' => 'POST'])
+@endsection

resources/views/grade-subject/edit.blade.php

@@ -0,0 +1,8 @@
+@extends('layouts.app')
+
+@section('content')
+    @include('grade-subject.form', [
+    'route' => route('grades.subjects.update',
+    ['grade' => $grade, 'subject' => $updateSubject]
+    ), 'method' => 'PUT'])
+@endsection

resources/views/grade-subject/form.blade.php

@@ -0,0 +1,24 @@
+<div class="container col-md-6">
+    <div class="row justify-content-center">
+        <div class="card mt-4">
+            <div class="card-body">
+                <form action="{{ $route }}" method="POST">
+                    @csrf
+                    @method($method)
+                    <div class="mb-3">
+                        <label for="subject_id" class="form-label">Предмет:</label>
+                        <select id="subject_id" name="subject_id" class="form-select" required>
+                            <option value="">Выберите предмет</option>
+                            @foreach($subjects as $subject)
+                                <option value="{{ $subject->id }}" {{ isset($updateSubject) && $updateSubject->id == $subject->id ? 'selected' : '' }}>
+                                    {{ $subject->name }}
+                                </option>
+                            @endforeach
+                        </select>
+                    </div>
+                    <button type="submit" class="btn btn-success">Подтвердить</button>
+                </form>
+            </div>
+        </div>
+    </div>
+</div>

resources/views/grade-teacher/create.blade.php

@@ -0,0 +1,5 @@
+@extends('layouts.app')
+
+@section('content')
+    @include('grade-teacher.form', ['route' => route('teachers.subjects.grades.store', [$teacher, $subject]), 'method' => 'POST'])
+@endsection

resources/views/grade-teacher/edit.blade.php

@@ -0,0 +1,8 @@
+@extends('layouts.app')
+
+@section('content')
+    @include('grade-teacher.form', [
+    'route' => route('teachers.subjects.grades.update',
+    ['teacher' => $teacher, 'subject' => $subject, 'grade' => $updateGrade]
+    ), 'method' => 'PUT'])
+@endsection

resources/views/grade-teacher/form.blade.php

@@ -0,0 +1,27 @@
+<div class="container col-md-6">
+    <div class="row justify-content-center">
+        <div class="card mt-4">
+            <div class="card-header">
+                {{ $subject->name }}
+            </div>
+            <div class="card-body">
+                <form action="{{ $route }}" method="POST">
+                    @csrf
+                    @method($method)
+                    <div class="mb-3">
+                        <label for="grade_id" class="form-label">Класс:</label>
+                        <select id="grade_id" name="grade_id" class="form-select" required>
+                            <option value="">Выберите класс</option>
+                            @foreach($grades as $grade)
+                                <option value="{{ $grade->id }}" {{ isset($updateGrade) && $updateGrade->id == $grade->id ? 'selected' : '' }}>
+                                    {{ $grade->name }}
+                                </option>
+                            @endforeach
+                        </select>
+                    </div>
+                    <button type="submit" class="btn btn-success">Подтвердить</button>
+                </form>
+            </div>
+        </div>
+    </div>
+</div>

resources/views/grades/index.blade.php

@@ -3,12 +3,6 @@
 @section('content')
     <div class="container col-md-6">
         <div class="row justify-content-center">
-            <div class="card">
-                <div class="card-header">{{__('Новый класс')}}</div>
-                <div class="card-body">
-                    <a href="{{ route('grades.create') }}" class="btn btn-success">Добавить</a>
-                </div>
-            </div>
             <div class="card mt-4">
                 <div class="card-header">{{__('Поиск класса')}}</div>
                 <div class="card-body">
@@ -24,10 +18,10 @@
                     </form>
                 </div>
             </div>
-            @if (count($grades))
                 <div class="card mt-4">
                     <div class="card-header">{{__('Классы')}}</div>
                     <div class="card-body">
+                        @if (count($grades))
                         <table class="table table-striped">
                             <thead>
                             <th>Название</th>
@@ -64,10 +58,15 @@
                             @endforeach
                             </tbody>
                         </table>
+                        @else
+                            <p>Классы отсутствуют</p>
+                        @endif
+                    </div>
+                    <div class="card-footer">
+                        <a href="{{ route('grades.create') }}" class="btn btn-success">Добавить</a>
                     </div>
                     <div class="card-footer">{{ $grades->links() }}</div>
                 </div>
-            @endif
         </div>
     </div>
 @endsection

resources/views/grades/show.blade.php

@@ -14,6 +14,49 @@
                     <a href="{{ route('grades.edit', $grade) }}" class="btn btn-primary">Редактировать</a>
                 </div>
             </div>
+            <div class="card mt-4">
+                <div class="card-header">
+                    {{__('Журнал предметов')}}
+                </div>
+                <div class="card-body">
+                    @if(count($subjects))
+                        <table class="table table-striped">
+                            <thead>
+                            <th>Название</th>
+                            <th>&nbsp;</th>
+                            </thead>
+                            <tbody>
+                            @foreach ($subjects as $subject)
+                                <tr>
+                                    <td class="table-text">
+                                        <div>
+                                            {{ $subject->name }}
+                                        </div>
+                                    </td>
+                                    <td>
+                                        <div>
+                                            <a href="{{ route('grades.subjects.edit', [$grade, $subject]) }}" class="btn btn-warning">Редактировать</a>
+                                        </div>
+                                    </td>
+                                    <td>
+                                        <form action="{{ route('grades.subjects.destroy', [$grade, $subject]) }}" method="POST" style="display: inline-block;">
+                                            @csrf
+                                            @method('DELETE')
+                                            <button type="submit" class="btn btn-danger">Удалить</button>
+                                        </form>
+                                    </td>
+                                </tr>
+                            @endforeach
+                            </tbody>
+                        </table>
+                    @else
+                        <p>У класса отсутствуют предметы</p>
+                    @endif
+                </div>
+                <div class="card-footer">
+                    <a href="{{ route('grades.subjects.create', $grade) }}" class="btn btn-success">Добавить</a>
+                </div>
+            </div>
         </div>
     </div>
 @endsection

resources/views/students/edit.blade.php

@@ -1,5 +1,5 @@
 @extends('layouts.app')
 
 @section('content')
-    @include('students.form', ['route' => route('students.update', $user), 'method' => 'PUT'])
+    @include('students.form', ['route' => route('students.update', $student), 'method' => 'PUT'])
 @endsection

resources/views/students/form.blade.php

@@ -34,11 +34,11 @@
                     </div>
                     <div class="mb-3">
                         <label for="email" class="form-label">Эл. почта:</label>
-                        <input type="text" id="email" name="email" class="form-control" value="{{ isset($student) ? $student->email : old('email') }}" required>
+                        <input type="text" id="email" name="email" class="form-control" value="{{ isset($student) ? $student->user->email : old('email') }}" required>
                     </div>
                     <div class="mb-3">
                         <label for="password" class="form-label">Пароль:</label>
-                        <input type="text" id="password" name="password" class="form-control" value="{{ isset($student) ? $student->password : old('password') }}" required>
+                        <input type="text" id="password" name="password" class="form-control" value="{{ isset($student) ? $student->user->password : old('password') }}" required>
                     </div>
                     <button type="submit" class="btn btn-success">Подтвердить</button>
                 </form>

resources/views/students/index.blade.php

@@ -3,12 +3,6 @@
 @section('content')
     <div class="container col-md-6">
         <div class="row justify-content-center">
-            <div class="card">
-                <div class="card-header">{{__('Новый ученик')}}</div>
-                <div class="card-body">
-                    <a href="{{ route('students.create') }}" class="btn btn-success">Добавить</a>
-                </div>
-            </div>
             <div class="card mt-4">
                 <div class="card-header">{{__('Поиск ученика')}}</div>
                 <div class="card-body">
@@ -23,10 +17,10 @@
                     </form>
                 </div>
             </div>
-            @if (count($students))
             <div class="card mt-4">
                 <div class="card-header">{{__('Ученики')}}</div>
                 <div class="card-body">
+                    @if(count($students))
                     <table class="table table-striped">
                         <thead>
                         <th>ФИО</th>
@@ -56,10 +50,15 @@
                         @endforeach
                         </tbody>
                     </table>
+                    @else
+                        <p>Ученики остутствуют</p>
+                    @endif
+                </div>
+                <div class="card-footer">
+                    <a href="{{ route('students.create') }}" class="btn btn-success">Добавить</a>
                 </div>
                 <div class="card-footer">{{ $students->links() }}</div>
             </div>
-            @endif
         </div>
     </div>
 @endsection

resources/views/subject-teacher/create.blade.php

@@ -0,0 +1,5 @@
+@extends('layouts.app')
+
+@section('content')
+    @include('subject-teacher.form', ['route' => route('teachers.subjects.store', $teacher), 'method' => 'POST'])
+@endsection

resources/views/subject-teacher/edit.blade.php

@@ -0,0 +1,8 @@
+@extends('layouts.app')
+
+@section('content')
+    @include('subject-teacher.form', [
+    'route' => route('teachers.subjects.update',
+    ['teacher' => $teacher, 'subject' => $updateSubject]
+    ), 'method' => 'PUT'])
+@endsection

resources/views/subject-teacher/form.blade.php

@@ -0,0 +1,24 @@
+<div class="container col-md-6">
+    <div class="row justify-content-center">
+        <div class="card mt-4">
+            <div class="card-body">
+                <form action="{{ $route }}" method="POST">
+                    @csrf
+                    @method($method)
+                    <div class="mb-3">
+                        <label for="subject_id" class="form-label">Предмет:</label>
+                        <select id="subject_id" name="subject_id" class="form-select" required>
+                            <option value="">Выберите предмет</option>
+                            @foreach($subjects as $subject)
+                                <option value="{{ $subject->id }}" {{ isset($updateSubject) && $updateSubject->id == $subject->id ? 'selected' : '' }}>
+                                    {{ $subject->name }}
+                                </option>
+                            @endforeach
+                        </select>
+                    </div>
+                    <button type="submit" class="btn btn-success">Подтвердить</button>
+                </form>
+            </div>
+        </div>
+    </div>
+</div>

resources/views/subject-teacher/show.blade.php

@@ -0,0 +1,52 @@
+@extends('layouts.app')
+
+@section('content')
+    <div class="container col-md-6">
+        <div class="row justify-content-center">
+            <div class="card mt-4">
+                <div class="card-header">
+                    {{ $subject->name }}
+                </div>
+                <div class="card-body">
+                    @if(count($grades))
+                        <table class="table table-striped">
+                            <thead>
+                            <th>Название</th>
+                            <th>&nbsp;</th>
+                            </thead>
+                            <tbody>
+                            @foreach ($grades as $grade)
+                                <tr>
+                                    <td class="table-text">
+                                        <div>
+                                            {{ $grade->name }}
+                                        </div>
+                                    </td>
+                                    <td>
+                                        <div>
+                                            <a href="{{ route('teachers.subjects.grades.edit', [$teacher, $subject, $grade]) }}" class="btn btn-warning">Редактировать</a>
+                                        </div>
+                                    </td>
+                                    <td>
+                                        <form action="{{ route('teachers.subjects.grades.destroy', [$teacher, $subject, $grade]) }}" method="POST" style="display: inline-block;">
+                                            @csrf
+                                            @method('DELETE')
+                                            <button type="submit" class="btn btn-danger">Удалить</button>
+                                        </form>
+                                    </td>
+                                </tr>
+                            @endforeach
+                            </tbody>
+                        </table>
+                    @else
+                        <p>У учителя отсутствуют классы</p>
+                    @endif
+                </div>
+                <div class="card-footer">
+                    <a href="{{ route('teachers.subjects.grades.create', [$teacher, $subject]) }}" class="btn btn-success">Добавить</a>
+                </div>
+            </div>
+        </div>
+    </div>
+@endsection
+

resources/views/subjects/index.blade.php

@@ -3,12 +3,6 @@
 @section('content')
     <div class="container col-md-6">
         <div class="row justify-content-center">
-            <div class="card">
-                <div class="card-header">{{__('Новый предмет')}}</div>
-                <div class="card-body">
-                    <a href="{{ route('subjects.create') }}" class="btn btn-success">Добавить</a>
-                </div>
-            </div>
             <div class="card mt-4">
                 <div class="card-header">{{__('Поиск предмета')}}</div>
                 <div class="card-body">
@@ -23,10 +17,10 @@
                     </form>
                 </div>
             </div>
-            @if (count($subjects))
             <div class="card mt-4">
                 <div class="card-header">{{__('Предметы')}}</div>
                 <div class="card-body">
+                    @if (count($subjects))
                     <table class="table table-striped">
                         <thead>
                         <th>Название</th>
@@ -56,10 +50,15 @@
                         @endforeach
                         </tbody>
                     </table>
+                    @else
+                        <p>Предметы отсутствуют</p>
+                    @endif
+                </div>
+                <div class="card-footer">
+                    <a href="{{ route('subjects.create') }}" class="btn btn-success">Добавить</a>
                 </div>
                 <div class="card-footer">{{ $subjects->links() }}</div>
             </div>
-            @endif
         </div>
     </div>
 @endsection

resources/views/teachers/edit.blade.php

@@ -1,5 +1,5 @@
 @extends('layouts.app')
 
 @section('content')
-    @include('teachers.form', ['route' => route('teachers.update', $user), 'method' => 'PUT'])
+    @include('teachers.form', ['route' => route('teachers.update', $teacher), 'method' => 'PUT'])
 @endsection

resources/views/teachers/form.blade.php

@@ -23,11 +23,11 @@
                     </div>
                     <div class="mb-3">
                         <label for="email" class="form-label">Эл. почта:</label>
-                        <input type="text" id="email" name="email" class="form-control" value="{{ isset($teacher) ? $teacher->email : old('email') }}" required>
+                        <input type="text" id="email" name="email" class="form-control" value="{{ isset($teacher) ? $teacher->user->email : old('email') }}" required>
                     </div>
                     <div class="mb-3">
                         <label for="password" class="form-label">Пароль:</label>
-                        <input type="text" id="password" name="password" class="form-control" value="{{ isset($teacher) ? $teacher->password : old('password') }}" required>
+                        <input type="text" id="password" name="password" class="form-control" value="{{ isset($teacher) ? $teacher->user->password : old('password') }}" required>
                     </div>
                     <button type="submit" class="btn btn-success">Подтвердить</button>
                 </form>

resources/views/teachers/index.blade.php

@@ -3,12 +3,6 @@
 @section('content')
     <div class="container col-md-6">
         <div class="row justify-content-center">
-            <div class="card">
-                <div class="card-header">{{__('Новый учитель')}}</div>
-                <div class="card-body">
-                    <a href="{{ route('teachers.create') }}" class="btn btn-success">Добавить</a>
-                </div>
-            </div>
             <div class="card mt-4">
                 <div class="card-header">{{__('Поиск учителя')}}</div>
                 <div class="card-body">
@@ -23,10 +17,10 @@
                     </form>
                 </div>
             </div>
-            @if (count($teachers))
                 <div class="card mt-4">
                     <div class="card-header">{{__('Учителя')}}</div>
                     <div class="card-body">
+                        @if (count($teachers))
                         <table class="table table-striped">
                             <thead>
                             <th>ФИО</th>
@@ -56,10 +50,15 @@
                             @endforeach
                             </tbody>
                         </table>
+                        @else
+                            <p>Учителя отсутствуют</p>
+                        @endif
+                    </div>
+                    <div class="card-footer">
+                        <a href="{{ route('teachers.create') }}" class="btn btn-success">Добавить</a>
                     </div>
                     <div class="card-footer">{{ $teachers->links() }}</div>
                 </div>
-            @endif
         </div>
     </div>
 @endsection

resources/views/teachers/show.blade.php

@@ -4,7 +4,9 @@
     <div class="container col-md-6">
         <div class="row justify-content-center">
             <div class="card">
-                <div class="card-header">{{ ('Учитель') }}</div>
+                <div class="card-header">
+                    {{ ('Учитель') }}
+                </div>
                 <div class="card-body">
                     <div class="mb-3">
                         <h5><strong>ФИО: </strong>{{ $teacher->fio }}</h5>
@@ -17,6 +19,49 @@
                     <a href="{{ route('teachers.edit', $teacher) }}" class="btn btn-primary">Редактировать</a>
                 </div>
             </div>
+            <div class="card mt-4">
+                <div class="card-header">
+                    {{__('Предметы учителя')}}
+                </div>
+                <div class="card-body">
+                    @if(count($subjects))
+                        <table class="table table-striped">
+                            <thead>
+                            <th>Название</th>
+                            <th>&nbsp;</th>
+                            </thead>
+                            <tbody>
+                            @foreach ($subjects as $subject)
+                                <tr>
+                                    <td class="table-text">
+                                        <div>
+                                            <a href="{{ route('teachers.subjects.show', [$teacher, $subject]) }}" class="btn btn-block col-8">{{ $subject->name }}</a>
+                                        </div>
+                                    </td>
+                                    <td>
+                                        <div>
+                                            <a href="{{ route('teachers.subjects.edit', [$teacher, $subject]) }}" class="btn btn-warning">Редактировать</a>
+                                        </div>
+                                    </td>
+                                    <td>
+                                        <form action="{{ route('teachers.subjects.destroy', [$teacher, $subject]) }}" method="POST" style="display: inline-block;">
+                                            @csrf
+                                            @method('DELETE')
+                                            <button type="submit" class="btn btn-danger">Удалить</button>
+                                        </form>
+                                    </td>
+                                </tr>
+                            @endforeach
+                            </tbody>
+                        </table>
+                    @else
+                        <p>У учителя отсутствуют предметы</p>
+                    @endif
+                </div>
+                <div class="card-footer">
+                    <a href="{{ route('teachers.subjects.create', $teacher) }}" class="btn btn-success">Добавить</a>
+                </div>
+            </div>
         </div>
     </div>
 @endsection

routes/web.php

@@ -1,8 +1,11 @@
 <?php
 
 use App\Http\Controllers\GradeController;
+use App\Http\Controllers\GradeSubjectController;
+use App\Http\Controllers\GradeTeacherController;
 use App\Http\Controllers\StudentController;
 use App\Http\Controllers\SubjectController;
+use App\Http\Controllers\SubjectTeacherController;
 use App\Http\Controllers\TeacherController;
 use Illuminate\Support\Facades\Route;
 
@@ -10,7 +13,13 @@ Route::get('/', function () {
     return redirect()->route('grades.index');
 });
 
-Route::resource('grades', GradeController::class);
-Route::resource('subjects', SubjectController::class);
-Route::resource('students', StudentController::class);
-Route::resource('teachers', TeacherController::class);
+Route::resources([
+    'grades' => GradeController::class,
+    'subjects' => SubjectController::class,
+    'students' => StudentController::class,
+    'teachers' => TeacherController::class,
+]);
+
+Route::resource('teachers.subjects', SubjectTeacherController::class)->except('index');
+Route::resource('teachers.subjects.grades', GradeTeacherController::class)->except('index', 'show');
+Route::resource('grades.subjects', GradeSubjectController::class)->except('index', 'show');