Lab 4 - доп.задание

front/src/App.js

@@ -6,6 +6,8 @@ import 'bootstrap/dist/css/bootstrap.min.css';
 import DrivingSchools from './components/DrivingSchools.jsx';
 import Categories from './components/Categories.jsx';
 import OneDrivingSchool from './components/OneDrivingSchool.jsx';
+import CountStudInCategory from './components/CountStudInCategory.jsx';
+
 function Router(props) {
     return useRoutes(props.rootRoute);
   }
@@ -17,6 +19,7 @@ function Router(props) {
       { path: '/drivingSchools', element: <DrivingSchools />, label: 'Автошколы' },
       { path: '/students', element: <Students />, label: 'Студенты' },
       { path: '/categories', element: <Categories />, label: 'Категории' },
+      { path: '/studcategory', element: <CountStudInCategory />, label: 'Количество студентов в категории' },
       { path: '/drivingSchool/:id', element: <OneDrivingSchool />},
     ];
     const links = routes.filter(route => route.hasOwnProperty('label'));

front/src/components/CatalogForGroup.jsx

@@ -0,0 +1,12 @@
+import TableForGroup from "./commons/TableForGroup.jsx";
+// это абстрактный компонент для всех справочников
+export default function CatalogForGroup(props) {
+
+    return  <>
+        <div>{props.name}</div>
+        <TableForGroup
+            headers={props.headers}
+            items={props.items}
+        /></>
+
+}

front/src/components/CatalogSC.jsx

@@ -0,0 +1,49 @@
+import Button from 'react-bootstrap/Button';
+import TableSC from "./commons/TableSC.jsx";
+import { useState} from 'react';
+import ModalForm from './commons/ModalForm.jsx';
+// это абстрактный компонент для всех справочников
+export default function CatalogSC(props) {
+    const [show, setShow] = useState(false);
+    const [modalTitle, setModalTitle] = useState("");
+
+    const handleClose = () => setShow(false);
+    const handleShow = () => setShow(true);
+
+
+    function handleAdd() {
+        setModalTitle("Добавление");
+        props.onBtnAdd();
+        handleShow();
+    }
+    function handleEdit(itemId) {
+        setModalTitle("Редактирование");
+        props.onEdit(itemId);
+        handleShow();
+    }
+    function handleRemove(item) {
+        props.onDelete(item);
+    }
+    function changeData(event) {
+        props.onFormChanged(event);
+    }
+
+    return  <>
+        <div>{props.name}</div>
+        <Button variant="success" onClick={handleAdd}>Добавить</Button>
+        <TableSC
+            headers={props.headers}
+            items={props.items}
+            onEdit={handleEdit}
+            onDelete={handleRemove}
+        />
+        <ModalForm
+            show={show}
+            onClose={handleClose}
+            modalTitle={modalTitle}
+            // onSubmit={submitForm}
+            onChange={changeData}
+            form={props.form}
+        /></>
+
+}

front/src/components/Categories.jsx

@@ -3,7 +3,7 @@ import Form from 'react-bootstrap/Form';
 import Button from 'react-bootstrap/Button';
 import { useState, useEffect } from 'react';
 import DataService from '../services/DataService';
-import Catalog from "./Catalog.jsx";
+import CatalogSC from "./CatalogSC.jsx";
 
 
 export default function Categories(props) {
@@ -94,7 +94,7 @@ export default function Categories(props) {
                 </Form>
 
     return <div className="container-lg pt-5 min-vh-100">
-        <Catalog name={nameCatalog}
+        <CatalogSC name={nameCatalog}
                     headers={headers} 
                     items={items} 
                     onAdd={handleAdd}
@@ -103,6 +103,6 @@ export default function Categories(props) {
                     onClose={reset}
                     onBtnAdd={reset}
                     form={form}>
-        </Catalog>
+        </CatalogSC>
     </div>
 }

front/src/components/CountStudInCategory.jsx

@@ -0,0 +1,37 @@
+import { useState, useEffect } from 'react';
+import DataService from '../services/DataService';
+import CatalogForGroup from "./CatalogForGroup.jsx";
+import { useNavigate } from "react-router-dom";
+import GroupedStudAndCategoryDto from "../models/GroupedStudAndCategoryDto";
+
+export default function CountStudInCategory(props) {
+
+  const headers = [
+    {name: 'categoryName', label: "Название"},
+    {name: 'studentsCount', label: "Студенты"},
+  ];
+
+  const nameCatalog = "Количество студентов в категории";
+
+  const url = '/categoryStudent/groupbycategory';
+
+  const [items, setItems] = useState([]);
+
+  useEffect(() => {
+    loadItems();
+  }, []);
+
+  function loadItems() {
+    DataService.readAll(url, (data) => new GroupedStudAndCategoryDto(data))
+        .then(data => setItems(data));
+  }
+
+  return <div className="container-lg pt-5 min-vh-100">
+    <CatalogForGroup name={nameCatalog}
+             headers={headers}
+             items={items}>
+    </CatalogForGroup>
+  </div>
+
+
+}

front/src/components/Students.jsx

@@ -3,7 +3,7 @@ import Form from 'react-bootstrap/Form';
 import Button from 'react-bootstrap/Button';
 import { useState, useEffect } from 'react';
 import DataService from '../services/DataService';
-import Catalog from "./Catalog.jsx";
+import CatalogSC from "./CatalogSC.jsx";
 export default function Students(props) {
     const headers = [
         {name: 'surname', label: "Фамилия"}, 
@@ -101,7 +101,7 @@ export default function Students(props) {
                 </Form>
 
     return <div className="container-lg pt-5 min-vh-100">
-        <Catalog name={nameCatalog}
+        <CatalogSC name={nameCatalog}
                     headers={headers} 
                     items={items} 
                     onAdd={handleAdd}
@@ -110,6 +110,6 @@ export default function Students(props) {
                     onClose={reset}
                     onBtnAdd={reset}
                     form={form}>
-        </Catalog>
+        </CatalogSC>
     </div>
 }

front/src/components/commons/ItemTableForGroup.jsx

@@ -0,0 +1,8 @@
+export default function ItemTableForGroup(props) {
+
+    return <tr key={props.item.id}>
+        {
+            props.headers.map((header) => <td key={`${header.name}_${props.item.id}`}>{props.item[header.name]}</td>)
+        }
+    </tr>
+}

front/src/components/commons/ItemTableSC.jsx

@@ -0,0 +1,18 @@
+import Button from 'react-bootstrap/Button';
+export default function ItemTableSC(props) {
+    function edit() {
+        props.onEdit(props.item.id);
+    }
+    function remove() {
+        props.onDelete(props.item.id);
+    }
+
+    return <tr key={props.item.id}>
+        {
+            props.headers.map((header) => <td key={`${header.name}_${props.item.id}`}>{props.item[header.name]}</td>)
+        }
+        {props.isOnlyView || <td key={`controls_${props.item.id}`}>
+            <Button variant="btn btn-outline-primary" onClick={edit}>Редактировать</Button>
+            <Button variant="btn btn-outline-danger" onClick={remove}>Удалить</Button></td>}
+    </tr>
+}

front/src/components/commons/TableForGroup.jsx

@@ -0,0 +1,26 @@
+import ItemTableForGroup from './ItemTableForGroup';
+
+export default function TableForGroup(props) {
+
+    return <div >
+        <table className={`table table-hover`}>
+            <thead>
+            <tr>
+                {
+                    props.headers.map((header) => <th key={header.name}>{header.label}</th>)
+                }
+            </tr>
+            </thead>
+            <tbody>
+            {
+                props.items.map((item, index) =>
+                    <ItemTableForGroup
+                        key={index}
+                        headers={props.headers}
+                        item={item}
+                        isOnlyView={props.isOnlyView}/>)
+            }
+            </tbody>
+        </table>
+    </div>
+}

front/src/components/commons/TableSC.jsx

@@ -0,0 +1,35 @@
+import ItemTableSC from './ItemTableSC';
+export default function TableSC(props) {
+    function edit(itemId) {
+        props.onEdit(itemId)
+    }
+    function remove(itemId) {
+        props.onDelete(itemId);
+    }
+
+    return <div >
+        <table className={`table table-hover`}>
+            <thead>
+            <tr>
+                {
+                    props.headers.map((header) => <th key={header.name}>{header.label}</th>)
+                }
+                {props.isOnlyView || <th key='controls'>Элементы управления</th>}
+
+            </tr>
+            </thead>
+            <tbody>
+            {
+                props.items.map((item, index) =>
+                    <ItemTableSC
+                        key={index}
+                        headers={props.headers}
+                        item={item}
+                        onDelete={remove}
+                        onEdit={edit}
+                        isOnlyView={props.isOnlyView}/>)
+            }
+            </tbody>
+        </table>
+    </div>
+}

front/src/models/GroupedStudAndCategoryDto.js

@@ -0,0 +1,7 @@
+export default class GroupedStudAndCategoryDto {
+    constructor(data) {
+        this.Id = data?.Id;
+        this.categoryName = data?.categoryName;
+        this.studentsCount = data?.studentsCount;
+    }
+}

src/main/java/ru/ulstu/is/cbapp/controller/CategoryStudentController.java

@@ -0,0 +1,26 @@
+package ru.ulstu.is.cbapp.controller;
+
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+import ru.ulstu.is.cbapp.dto.GroupedStudAndCategoryDto;
+import ru.ulstu.is.cbapp.service.CategoryService;
+import ru.ulstu.is.cbapp.service.CategoryStudentService;
+
+import java.util.List;
+
+@RestController
+@RequestMapping("/categoryStudent")
+public class CategoryStudentController {
+
+    private CategoryStudentService categoryStudentService;
+
+    public CategoryStudentController(CategoryStudentService categoryStudentService) {
+        this.categoryStudentService = categoryStudentService;
+    }
+
+    @GetMapping("/groupbycategory")
+    public List<GroupedStudAndCategoryDto> getGroupedStudAndCategory(){
+        return categoryStudentService.getGroupedStudAndCategory();
+    }
+}

src/main/java/ru/ulstu/is/cbapp/dao/CategoryRepository.java

@@ -1,8 +1,11 @@
 package ru.ulstu.is.cbapp.dao;
 
+import org.springframework.data.jpa.repository.Query;
+import ru.ulstu.is.cbapp.dto.GroupedStudAndCategoryDto;
 import ru.ulstu.is.cbapp.models.Category;
 import org.springframework.data.jpa.repository.JpaRepository;
 
+import java.util.List;
 import java.util.Optional;
 
 public interface CategoryRepository extends JpaRepository<Category, Long> {

src/main/java/ru/ulstu/is/cbapp/dao/StudentCategoriesRepository.java

@@ -0,0 +1,19 @@
+package ru.ulstu.is.cbapp.dao;
+
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.Query;
+import ru.ulstu.is.cbapp.dto.GroupedStudAndCategoryDto;
+import ru.ulstu.is.cbapp.models.StudentCategories;
+
+import java.util.List;
+import java.util.Optional;
+
+public interface StudentCategoriesRepository extends JpaRepository<StudentCategories, Long> {
+
+    Optional<StudentCategories> findById(Long id);
+
+    @Query("SELECT new ru.ulstu.is.cbapp.dto.GroupedStudAndCategoryDto(cs.category.name,COUNT(cs.student.id))"+
+            "FROM StudentCategories cs "+
+            "group by cs.category.name")
+    List<GroupedStudAndCategoryDto> getGroupedStudAndCategory();
+}

src/main/java/ru/ulstu/is/cbapp/dto/GroupedStudAndCategoryDto.java

@@ -0,0 +1,27 @@
+package ru.ulstu.is.cbapp.dto;
+
+public class GroupedStudAndCategoryDto {
+    private String categoryName;
+    private Long StudentsCount;
+
+    public GroupedStudAndCategoryDto(String categoryName, Long StudentsCount){
+        this.categoryName=categoryName;
+        this.StudentsCount=StudentsCount;
+    }
+
+    public String getCategoryName() {
+        return categoryName;
+    }
+
+    public void setCategoryId(String categoryName) {
+        this.categoryName = categoryName;
+    }
+
+    public Long getStudentsCount() {
+        return StudentsCount;
+    }
+
+    public void setStudentsCount(Long studentsCount) {
+        StudentsCount = studentsCount;
+    }
+}

src/main/java/ru/ulstu/is/cbapp/models/Category.java

@@ -2,9 +2,7 @@ package ru.ulstu.is.cbapp.models;
 
 import jakarta.persistence.*;
 
-import java.util.ArrayList;
+import java.util.*;
-import java.util.List;
-import java.util.Objects;
 
 @Entity
 public class Category {
@@ -16,7 +14,7 @@ public class Category {
 
     //mappedBy - атрибут, указывающий, что классом-владельцем отношений является другой класс
     @ManyToMany(mappedBy = "categories", cascade = {CascadeType.REMOVE}, fetch = FetchType.EAGER)
-    private List<Student> students = new ArrayList<>();
+    private Set<Student> students = new HashSet<>();
 
     public Category() {
     }
@@ -37,11 +35,11 @@ public class Category {
         return Id;
     }
 
-    public List<Student> getStudents() {
+    public Set<Student> getStudents() {
         return students;
     }
 
-    public void setStudents(List<Student> students) {
+    public void setStudents(Set<Student> students) {
         this.students = students;
     }
 

src/main/java/ru/ulstu/is/cbapp/models/Student.java

@@ -17,6 +17,9 @@ public class Student {
     private DrivingSchool drivingSchool;
 
     @ManyToMany(cascade = CascadeType.ALL, fetch = FetchType.EAGER)
+    //@JoinTable(name="CATEGORY_STUDENT",
+    //joinColumns = {@JoinColumn(name="student_id")},
+            //inverseJoinColumns = {@JoinColumn(name="category_id")})
     private Set<Category> categories = new HashSet<>();
 
 

src/main/java/ru/ulstu/is/cbapp/models/StudentCategories.java

@@ -0,0 +1,36 @@
+package ru.ulstu.is.cbapp.models;
+
+import jakarta.persistence.*;
+
+@Entity
+@Table(name="student_categories")
+@IdClass(StudentCategoriesId.class)
+public class StudentCategories {
+
+    public Student getStudent() {
+        return student;
+    }
+
+    public void setStudent(Student student) {
+        this.student = student;
+    }
+
+    public Category getCategory() {
+        return category;
+    }
+
+    public void setCategory(Category category) {
+        this.category = category;
+    }
+
+    @Id
+    @ManyToOne
+    @JoinColumn(name="students_id")
+    private Student student;
+
+    @Id
+    @ManyToOne
+    @JoinColumn(name="categories_id")
+    private Category category;
+
+}

src/main/java/ru/ulstu/is/cbapp/models/StudentCategoriesId.java

@@ -0,0 +1,24 @@
+package ru.ulstu.is.cbapp.models;
+
+import java.io.Serializable;
+
+public class StudentCategoriesId implements Serializable {
+    private Long student;
+    private Long category;
+
+    public Long getStudent() {
+        return student;
+    }
+
+    public void setStudent(Long student) {
+        this.student = student;
+    }
+
+    public Long getCategory() {
+        return category;
+    }
+
+    public void setCategory(Long category) {
+        this.category = category;
+    }
+}

src/main/java/ru/ulstu/is/cbapp/service/CategoryService.java

@@ -1,6 +1,7 @@
 package ru.ulstu.is.cbapp.service;
 
 import ru.ulstu.is.cbapp.dao.CategoryRepository;
+import ru.ulstu.is.cbapp.dto.GroupedStudAndCategoryDto;
 import ru.ulstu.is.cbapp.models.Category;
 import jakarta.persistence.EntityNotFoundException;
 import org.springframework.stereotype.Service;
@@ -65,5 +66,4 @@ public class CategoryService {
         categoryRepository.deleteAll();
     }
 
-
 }

src/main/java/ru/ulstu/is/cbapp/service/CategoryStudentService.java

@@ -0,0 +1,23 @@
+package ru.ulstu.is.cbapp.service;
+
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+import ru.ulstu.is.cbapp.dao.StudentCategoriesRepository;
+import ru.ulstu.is.cbapp.dto.GroupedStudAndCategoryDto;
+
+import java.util.List;
+
+@Service
+public class CategoryStudentService {
+
+    private StudentCategoriesRepository studentCategoriesRepository;
+
+    public CategoryStudentService(StudentCategoriesRepository studentCategoriesRepository) {
+        this.studentCategoriesRepository = studentCategoriesRepository;
+    }
+
+    @Transactional(readOnly = true)
+    public List<GroupedStudAndCategoryDto> getGroupedStudAndCategory() {
+        return studentCategoriesRepository.getGroupedStudAndCategory();
+    }
+}