feat: One to Many mappings

backend/src/main/java/com/reactpairdemo/demo/DemoApplication.java

@@ -1,7 +1,9 @@
 package com.reactpairdemo.demo;
 
+import org.modelmapper.ModelMapper;
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.context.annotation.Bean;
 
 @SpringBootApplication
 public class DemoApplication {
@@ -13,5 +15,6 @@ public static void main(String[] args) {
     public ModelMapper modelMapper() {
         return new ModelMapper();
     }
-
+// user have crud application
+	// user can have many education id,degree ,percentage, passing date ,shoolName pagination should work
 }

backend/src/main/java/com/reactpairdemo/demo/controller/EducationController.java

@@ -0,0 +1,50 @@
+package com.reactpairdemo.demo.controller;
+
+import com.reactpairdemo.demo.dto.EducationDto;
+import com.reactpairdemo.demo.dto.EducationDto;
+import com.reactpairdemo.demo.entity.Education;
+import com.reactpairdemo.demo.service.EducationService;
+import jakarta.validation.Valid;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.*;
+
+import java.util.List;
+
+@RestController
+@RequestMapping("/api/v1/education")
+public class EducationController {
+
+    @Autowired
+    private EducationService educationService;
+    @GetMapping
+    public ResponseEntity<List<EducationDto>> getAllEducations() {
+        return new ResponseEntity<>(educationService.getAllEducations(), HttpStatus.OK);
+    }
+
+
+    @PostMapping("/user/{userId}")
+    public ResponseEntity<EducationDto> createEducation(@Valid @RequestBody Education educationDto, @PathVariable Long userId) {
+        return new ResponseEntity<>(educationService.createEducation(educationDto,userId), HttpStatus.CREATED);
+    }
+
+
+    @GetMapping("/{id}")
+    public ResponseEntity<EducationDto> getEducationById(@PathVariable Long id) {
+        return new ResponseEntity<>(educationService.getEducationById(id), HttpStatus.OK);
+
+    }
+
+
+    @PutMapping("/{id}/user/{userId}")
+    public ResponseEntity<EducationDto> updateEducation(@PathVariable Long id, @PathVariable Long userId,@Valid @RequestBody EducationDto educationDto) {
+        return new ResponseEntity<>(educationService.updateEducation(id,userId,educationDto), HttpStatus.OK);
+    }
+
+
+    @DeleteMapping("/{id}")
+    public ResponseEntity<String> deleteEducation(@PathVariable Long id) {
+        return new ResponseEntity<>(educationService.deleteEducation(id), HttpStatus.OK);
+    }
+}

backend/src/main/java/com/reactpairdemo/demo/controller/UserController.java

@@ -0,0 +1,51 @@
+package com.reactpairdemo.demo.controller;
+
+import com.reactpairdemo.demo.dto.UserDto;
+import com.reactpairdemo.demo.service.UserService;
+import jakarta.validation.Valid;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.*;
+
+import java.util.List;
+
+import static com.reactpairdemo.demo.utils.Constants.BASE_URL;
+
+@RestController
+@RequestMapping(BASE_URL)
+public class UserController {
+
+    @Autowired
+    private UserService userService;
+
+    @GetMapping
+    public ResponseEntity<List<UserDto>> getAllUsers() {
+        return new ResponseEntity<>(userService.getAllUsers(), HttpStatus.OK);
+    }
+
+
+    @PostMapping
+    public ResponseEntity<UserDto> createUser(@Valid @RequestBody UserDto userDto) {
+        return new ResponseEntity<>(userService.createUser(userDto), HttpStatus.CREATED);
+    }
+
+
+    @GetMapping("/{id}")
+    public ResponseEntity<UserDto> getUserById(@PathVariable Long id) {
+        return new ResponseEntity<>(userService.getUserById(id), HttpStatus.OK);
+
+    }
+
+
+    @PutMapping("/{id}")
+    public ResponseEntity<UserDto> updateUser(@PathVariable Long id, @RequestBody UserDto userDto) {
+        return new ResponseEntity<>(userService.updateUser(id,userDto), HttpStatus.OK);
+    }
+
+
+    @DeleteMapping("/{id}")
+    public ResponseEntity<String> deleteUser(@PathVariable Long id) {
+        return new ResponseEntity<>(userService.deleteUser(id), HttpStatus.OK);
+    }
+}

backend/src/main/java/com/reactpairdemo/demo/dto/EducationDto.java

@@ -0,0 +1,28 @@
+package com.reactpairdemo.demo.dto;
+
+import com.fasterxml.jackson.annotation.JsonFormat;
+import com.reactpairdemo.demo.entity.User;
+import jakarta.persistence.JoinColumn;
+import jakarta.persistence.ManyToOne;
+import jakarta.validation.constraints.NotNull;
+import jakarta.validation.constraints.Size;
+import lombok.Builder;
+import lombok.Data;
+import org.springframework.format.annotation.DateTimeFormat;
+
+import java.time.LocalDate;
+
+@Data
+public class EducationDto {
+
+    private Long id;
+    @NotNull(message = "Please Enter courseName")
+    @Size(min = 4,message = "Please Enter valid courseName")
+    private String courseName;
+    @NotNull(message = "Please Enter courseName")
+    private String percentage;
+
+    @NotNull(message = "Please Enter courseName")
+    private LocalDate passingYear;
+
+}

backend/src/main/java/com/reactpairdemo/demo/dto/UserDto.java

@@ -0,0 +1,31 @@
+package com.reactpairdemo.demo.dto;
+
+import com.reactpairdemo.demo.entity.Education;
+import jakarta.persistence.CascadeType;
+import jakarta.persistence.OneToMany;
+
+import jakarta.validation.constraints.*;
+import lombok.Builder;
+import lombok.Data;
+
+import java.util.ArrayList;
+import java.util.List;
+
+
+@Data
+public class UserDto {
+    private Long id;
+    @NotNull(message = "Please enter email")
+    @Email(message = "Invalid email format")
+    private String email;
+    @NotNull(message = "Please enter password")
+    @Pattern(regexp = "^(?=.*[A-Z])(?=.*[a-z])(?=.*\\d)(?=.*[@#$%^&+=])[A-Za-z\\d@#$%^&+=]{8,}$",message = "Invalid password format")
+    private String password;
+    @NotNull(message = "Please enter name")
+    @Size(min = 4,message = "Please enter a valid name")
+    private String name;
+    @NotNull(message = "Please enter age")
+    private Long age;
+
+    private List<EducationDto> education= new ArrayList<>();
+}

backend/src/main/java/com/reactpairdemo/demo/entity/Education.java

@@ -0,0 +1,25 @@
+package com.reactpairdemo.demo.entity;
+
+import com.fasterxml.jackson.annotation.JsonFormat;
+import jakarta.persistence.*;
+import lombok.Data;
+import org.springframework.format.annotation.DateTimeFormat;
+
+import java.time.LocalDate;
+
+@Data
+@Entity
+public class Education {
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
+    private String courseName;
+    private String percentage;
+    @JsonFormat(pattern = "dd/MM/yyyy")
+    @DateTimeFormat(pattern = "dd/MM/yyyy")
+    private LocalDate passingYear;
+
+    @ManyToOne
+    @JoinColumn(name = "user_id")
+    private User user;
+}

backend/src/main/java/com/reactpairdemo/demo/entity/User.java

@@ -0,0 +1,22 @@
+package com.reactpairdemo.demo.entity;
+
+import jakarta.persistence.*;
+import lombok.Data;
+
+import java.util.List;
+
+@Data
+@Entity(name = "student_edu")
+public class User {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
+    private String email;
+    private String password;
+    private String name;
+    private Long age;
+
+    @OneToMany(mappedBy = "user",cascade = CascadeType.ALL,orphanRemoval = true)
+    private List<Education> education;
+}

backend/src/main/java/com/reactpairdemo/demo/exceptions/ErrorResponse.java

@@ -0,0 +1,11 @@
+package com.reactpairdemo.demo.exceptions;
+
+import lombok.Builder;
+import lombok.Data;
+
+@Data
+@Builder
+public class ErrorResponse {
+    String message;
+    String title;
+}

backend/src/main/java/com/reactpairdemo/demo/exceptions/GlobalHandleException.java

@@ -0,0 +1,50 @@
+package com.reactpairdemo.demo.exceptions;
+
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.validation.FieldError;
+import org.springframework.web.bind.MethodArgumentNotValidException;
+import org.springframework.web.bind.annotation.ExceptionHandler;
+import org.springframework.web.bind.annotation.RestControllerAdvice;
+import org.springframework.web.servlet.resource.NoResourceFoundException;
+
+
+import java.util.HashMap;
+import java.util.Map;
+
+@RestControllerAdvice
+@Slf4j
+public class GlobalHandleException {
+    @ExceptionHandler(ResourceNotFoundException.class)
+    public ResponseEntity<ErrorResponse> handleResourceNotFoundException(
+            ResourceNotFoundException ex
+    ) {
+        log.warn(String.format(">>> {}", ex.getMessage()));
+        return new ResponseEntity<>(new ErrorResponse(ex.getMessage(), HttpStatus.NOT_FOUND.toString()), HttpStatus.NOT_FOUND);
+    }
+    @ExceptionHandler(NoResourceFoundException.class)
+    public ResponseEntity<ErrorResponse> handleNoResourceFoundException(NoResourceFoundException ex) {
+        log.warn(String.format(">>> {}", ex.getMessage()));
+        return new ResponseEntity<>(new ErrorResponse(ex.getMessage(), HttpStatus.BAD_REQUEST.toString()),HttpStatus.BAD_REQUEST);
+    }
+
+    @ExceptionHandler(IllegalArgumentException.class)
+    public ResponseEntity<ErrorResponse> handleIllegalArgumentException(IllegalArgumentException ex) {
+        log.warn(String.format(">>> {}", ex.getMessage()));
+        return new ResponseEntity<>(new ErrorResponse(ex.getMessage(), HttpStatus.BAD_REQUEST.toString()),HttpStatus.BAD_REQUEST);
+    }
+
+    @ExceptionHandler(MethodArgumentNotValidException.class)
+    public ResponseEntity<Map<String,String>> handleMethodArgumentNotValidException(MethodArgumentNotValidException e){
+         Map<String,String> resp=new HashMap<>();
+        e.getBindingResult().getAllErrors().forEach(objectError -> {
+            String fieldName=((FieldError)(objectError)).getField();
+            String message=objectError.getDefaultMessage();
+            resp.put(fieldName,message);
+        });
+        return ResponseEntity.status(HttpStatus.NOT_ACCEPTABLE).body(resp);
+    }
+
+}

backend/src/main/java/com/reactpairdemo/demo/exceptions/ResourceNotFoundException.java

@@ -0,0 +1,7 @@
+package com.reactpairdemo.demo.exceptions;
+
+public class ResourceNotFoundException extends RuntimeException{
+    public ResourceNotFoundException(String message) {
+        super(message);
+    }
+}

backend/src/main/java/com/reactpairdemo/demo/repo/EducationRepository.java

@@ -0,0 +1,14 @@
+package com.reactpairdemo.demo.repo;
+
+import com.reactpairdemo.demo.entity.Education;
+import com.reactpairdemo.demo.entity.User;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+import java.util.Optional;
+
+
+public interface EducationRepository extends JpaRepository<Education, Long> {
+    Optional<Education> findByCourseName(String courseName);
+}
+
+

backend/src/main/java/com/reactpairdemo/demo/repo/UserRepository.java

@@ -0,0 +1,12 @@
+package com.reactpairdemo.demo.repo;
+
+import com.reactpairdemo.demo.entity.User;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+import java.util.List;
+import java.util.Optional;
+
+public interface UserRepository extends JpaRepository<User,Long> {
+    Optional<User> findByEmail(String email);
+    List<User> findByName(String name);
+}

backend/src/main/java/com/reactpairdemo/demo/service/EducationService.java

@@ -0,0 +1,14 @@
+package com.reactpairdemo.demo.service;
+
+import com.reactpairdemo.demo.dto.EducationDto;
+import com.reactpairdemo.demo.entity.Education;
+
+import java.util.List;
+
+public interface EducationService {
+    List<EducationDto> getAllEducations();
+    EducationDto createEducation(Education educationDto, Long userId);
+    EducationDto getEducationById(Long id);
+    EducationDto updateEducation(Long id ,Long userId, EducationDto educationDto);
+    String deleteEducation(Long id);
+}

backend/src/main/java/com/reactpairdemo/demo/service/UserService.java

@@ -0,0 +1,14 @@
+package com.reactpairdemo.demo.service;
+
+import com.reactpairdemo.demo.dto.UserDto;
+
+import java.util.List;
+
+public interface UserService {
+    List<UserDto> getAllUsers();
+    UserDto createUser(UserDto userDto);
+    UserDto getUserById(Long id);
+    UserDto updateUser(Long id , UserDto userDto);
+    String deleteUser(Long id);
+
+}