label deletion reworked

src/main/java/hexlet/code/app/handler/GlobalExceptionHandler.java

@@ -2,7 +2,6 @@
 
 import hexlet.code.app.exception.ResourceNotFoundException;
 import hexlet.code.app.exception.UnableDeletionException;
-import org.springframework.dao.DataIntegrityViolationException;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
 import org.springframework.web.bind.annotation.ControllerAdvice;
@@ -20,9 +19,4 @@ public ResponseEntity<String> handleResourceNotFound(ResourceNotFoundException e
     public ResponseEntity<String> handleUnableDeletion(UnableDeletionException exception) {
         return ResponseEntity.status(HttpStatus.NOT_ACCEPTABLE).body(exception.getMessage());
     }
-
-    @ExceptionHandler(DataIntegrityViolationException.class)
-    public ResponseEntity<String> handleIntegrityViolationException(DataIntegrityViolationException exception) {
-        return ResponseEntity.status(HttpStatus.NOT_ACCEPTABLE).body(exception.getMessage());
-    }
 }

src/main/java/hexlet/code/app/label/LabelRepository.java

@@ -1,11 +1,19 @@
 package hexlet.code.app.label;
 
 import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.Query;
 import org.springframework.stereotype.Repository;
 
 import java.util.Optional;
+import java.util.Set;
 
 @Repository
 public interface LabelRepository extends JpaRepository<Label, Long> {
     Optional<Label> findByName(String name);
+
+    @Query(value = """
+            select label_id from task_labels
+            where label_id = ?1
+            """, nativeQuery = true)
+    Set<Long> getIdFromCrossTable(Long id);
 }

src/main/java/hexlet/code/app/label/LabelService.java

@@ -1,6 +1,7 @@
 package hexlet.code.app.label;
 
 import hexlet.code.app.exception.ResourceNotFoundException;
+import hexlet.code.app.exception.UnableDeletionException;
 import hexlet.code.app.label.dto.LabelCreateDTO;
 import hexlet.code.app.label.dto.LabelDTO;
 import hexlet.code.app.label.dto.LabelUpdateDTO;
@@ -11,6 +12,7 @@
 import org.springframework.transaction.annotation.Transactional;
 
 import java.util.List;
+import java.util.Set;
 
 @Service
 @Transactional(readOnly = true)
@@ -51,6 +53,10 @@ public LabelDTO update(Long id, LabelUpdateDTO data) {
 
     @Transactional
     public void delete(Long id) {
+        Set<Long> links = repository.getIdFromCrossTable(id);
+        if (!links.isEmpty()) {
+            throw new UnableDeletionException("Label has active tasks");
+        }
         repository.deleteById(id);
     }
 }

src/test/java/hexlet/code/app/controller/api/LabelControllerTest.java

@@ -27,7 +27,6 @@
 import static net.javacrumbs.jsonunit.assertj.JsonAssertions.assertThatJson;
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.springframework.security.test.web.servlet.request.SecurityMockMvcRequestPostProcessors.jwt;
-import static org.springframework.security.test.web.servlet.request.SecurityMockMvcRequestPostProcessors.user;
 import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.delete;
 import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
 import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.post;