#42 method hasErrors didn't work, return to the previous state

src/main/java/ru/ulstu/grant/controller/GrantController.java

@@ -25,7 +25,6 @@ import static org.springframework.util.StringUtils.isEmpty;
 import static ru.ulstu.grant.controller.Navigation.GRANTS_PAGE;
 import static ru.ulstu.grant.controller.Navigation.GRANT_PAGE;
 import static ru.ulstu.grant.controller.Navigation.REDIRECT_TO;
-import static ru.ulstu.grant.controller.Navigation.hasErrors;
 
 
 @Controller()
@@ -64,10 +63,12 @@ public class GrantController {
         if (grantDto.getDeadlines().isEmpty()) {
             errors.rejectValue("deadlines", "errorCode", "Не может быть пустым");
         }
-//        if (grantDto.getLeader().getId().equals(null)) {
-//            errors.rejectValue("leader", "errorCode", "Укажите руководителя");
-//        }
-        hasErrors(errors, GRANT_PAGE);
+        if (grantDto.getLeaderId().equals(null)) {
+            errors.rejectValue("leader", "errorCode", "Укажите руководителя");
+        }
+        if (errors.hasErrors()) {
+            return GRANT_PAGE;
+        }
         grantService.save(grantDto);
         return String.format(REDIRECT_TO, GRANTS_PAGE);
     }
@@ -75,14 +76,18 @@ public class GrantController {
     @PostMapping(value = "/grant", params = "addDeadline")
     public String addDeadline(@Valid GrantDto grantDto, Errors errors) {
         filterEmptyDeadlines(grantDto);
-        hasErrors(errors, GRANT_PAGE);
+        if (errors.hasErrors()) {
+            return GRANT_PAGE;
+        }
         grantDto.getDeadlines().add(new Deadline());
         return GRANT_PAGE;
     }
 
     @PostMapping(value = "/grant", params = "createProject")
     public String createProject(@Valid GrantDto grantDto, Errors errors) {
-        hasErrors(errors, GRANT_PAGE);
+        if (errors.hasErrors()) {
+            return GRANT_PAGE;
+        }
         grantService.createProject(grantDto);
         return GRANT_PAGE;
     }

src/main/java/ru/ulstu/grant/controller/Navigation.java

@@ -1,16 +1,7 @@
 package ru.ulstu.grant.controller;
 
-import org.springframework.validation.Errors;
-
 public class Navigation {
     public static final String REDIRECT_TO = "redirect:%s";
     public static final String GRANTS_PAGE = "/grants/grants";
     public static final String GRANT_PAGE = "/grants/grant";
-
-    public static String hasErrors(Errors errors, String page) {
-        if (errors.hasErrors()) {
-            return page;
-        }
-        return null;
-    }
 }