src/main/java/ru/ulstu/project/controller/ProjectController.java

@@ -67,7 +67,7 @@ public class ProjectController {
         if (projectDto.getDeadlines().isEmpty()) {
             errors.rejectValue("deadlines", "errorCode", "Не может быть пустым");
         }
-        if (errors.hasErrors()) {
+        if (errors.hasErrors() || !projectService.save(projectDto, errors)) {
             return "/projects/project";
         }
         projectService.save(projectDto);

src/main/java/ru/ulstu/project/model/ProjectDto.java

@@ -7,6 +7,7 @@ import org.thymeleaf.util.StringUtils;
 import ru.ulstu.deadline.model.Deadline;
 import ru.ulstu.file.model.FileDataDto;
 import ru.ulstu.grant.model.GrantDto;
+import ru.ulstu.name.NameContainer;
 import ru.ulstu.user.model.User;
 import ru.ulstu.user.model.UserDto;
 
@@ -18,7 +19,7 @@ import java.util.stream.Collectors;
 
 import static ru.ulstu.core.util.StreamApiUtils.convert;
 
-public class ProjectDto {
+public class ProjectDto extends NameContainer {
     private Integer id;
 
     @NotEmpty

src/main/java/ru/ulstu/project/repository/ProjectRepository.java

@@ -1,8 +1,13 @@
 package ru.ulstu.project.repository;
 
 import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.Query;
+import org.springframework.data.repository.query.Param;
+import ru.ulstu.name.BaseRepository;
 import ru.ulstu.project.model.Project;
 
-public interface ProjectRepository extends JpaRepository<Project, Integer> {
+public interface ProjectRepository extends JpaRepository<Project, Integer>, BaseRepository {
-
+    @Override
+    @Query("SELECT title FROM Project c WHERE (c.title = :name) AND (:id IS NULL OR c.id != :id) ")
+    String findByNameAndNotId(@Param("name") String name, @Param("id") Integer id);
 }

src/main/java/ru/ulstu/project/service/ProjectService.java

@@ -2,12 +2,14 @@ package ru.ulstu.project.service;
 
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
+import org.springframework.validation.Errors;
 import org.thymeleaf.util.StringUtils;
 import ru.ulstu.deadline.service.DeadlineService;
 import ru.ulstu.file.model.FileDataDto;
 import ru.ulstu.file.service.FileService;
 import ru.ulstu.grant.model.GrantDto;
 import ru.ulstu.grant.repository.GrantRepository;
+import ru.ulstu.name.BaseService;
 import ru.ulstu.project.model.Project;
 import ru.ulstu.project.model.ProjectDto;
 import ru.ulstu.project.repository.ProjectRepository;
@@ -26,7 +28,7 @@ import static ru.ulstu.core.util.StreamApiUtils.convert;
 import static ru.ulstu.project.model.Project.ProjectStatus.TECHNICAL_TASK;
 
 @Service
-public class ProjectService {
+public class ProjectService extends BaseService {
     private final static int MAX_DISPLAY_SIZE = 40;
 
     private final ProjectRepository projectRepository;
@@ -48,6 +50,7 @@ public class ProjectService {
         this.fileService = fileService;
         this.eventService = eventService;
         this.userService = userService;
+        this.baseRepository = projectRepository;
     }
 
     public List<Project> findAll() {
@@ -118,6 +121,19 @@ public class ProjectService {
         return project;
     }
 
+    public Boolean save(ProjectDto projectDto, Errors errors) throws IOException {
+        projectDto.setName(projectDto.getTitle());
+        checkUniqueName(projectDto,
+                errors,
+                projectDto.getId(),
+                "title",
+                "Проект с таким именем уже существует");
+        if (errors.hasErrors()) {
+            return false;
+        }
+        return true;
+    }
+
     public Project save(ProjectDto projectDto) throws IOException {
         if (isEmpty(projectDto.getId())) {
             return create(projectDto);

src/main/resources/templates/projects/project.html

@@ -30,11 +30,12 @@
                                     <input class="form-control" id="title" type="text"
                                            placeholder="Название проекта"
                                            th:field="*{title}"/>
-                                    <p th:if="${#fields.hasErrors('title')}" th:errors="*{title}"
-                                       class="alert alert-danger">Incorrect title</p>
-                                    <p class="help-block text-danger"></p>
                                 </div>
 
+                                <p th:if="${#fields.hasErrors('title')}" th:errors="*{title}"
+                                   class="alert alert-danger">Incorrect title</p>
+                                <p class="help-block text-danger"></p>
+
                                 <div class="form-group">
                                     <label for="status">Статус:</label>
                                     <select class="form-control" th:field="*{status}" id="status">