added Pivot model

app/Http/Requests/ScorePostRequest.php

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

app/Models/Score.php

@@ -0,0 +1,11 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Relations\Pivot;
+
+class Score extends Pivot
+{
+    use HasFactory;
+}

app/Models/Student.php

@@ -7,6 +7,7 @@ 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\BelongsToMany;
 use Illuminate\Database\Eloquent\Relations\MorphOne;
 
 class Student extends Model
@@ -31,6 +32,11 @@ class Student extends Model
         return $this->morphOne(User::class, 'userable');
     }
 
+    public function subjects(): BelongsToMany
+    {
+        return $this->belongsToMany(Subject::class)->using(Score::class);
+    }
+
     public function scopeFilter(Builder $query): void
     {
         $name = request('name');

app/Models/Subject.php

@@ -26,6 +26,11 @@ class Subject extends Model
         return $this->belongsToMany(Teacher::class);
     }
 
+    public function students(): BelongsToMany
+    {
+        return $this->belongsToMany(Student::class)->using(Score::class);
+    }
+
     public function scopeFilter(Builder $query): void
     {
         $name = request('name');