diff -r 6105ee2cceaf -r 947d0f6a6a83 src/main/java/de/uapcore/lightpit/dao/postgres/PGIssueDao.java
--- a/src/main/java/de/uapcore/lightpit/dao/postgres/PGIssueDao.java	Thu Oct 15 12:27:05 2020 +0200
+++ b/src/main/java/de/uapcore/lightpit/dao/postgres/PGIssueDao.java	Thu Oct 15 13:31:52 2020 +0200
@@ -120,20 +120,6 @@
         );
     }
 
-    private User obtainUser(ResultSet result) throws SQLException {
-        final int id = result.getInt("userid");
-        if (id != 0) {
-            final var user = new User(id);
-            user.setUsername(result.getString("username"));
-            user.setGivenname(result.getString("givenname"));
-            user.setLastname(result.getString("lastname"));
-            user.setMail(result.getString("mail"));
-            return user;
-        } else {
-            return null;
-        }
-    }
-
     private Issue mapColumns(ResultSet result) throws SQLException {
         final var project = new Project(result.getInt("project"));
         project.setName(result.getString("projectname"));
@@ -143,7 +129,7 @@
         issue.setCategory(IssueCategory.valueOf(result.getString("category")));
         issue.setSubject(result.getString("subject"));
         issue.setDescription(result.getString("description"));
-        issue.setAssignee(obtainUser(result));
+        issue.setAssignee(PGUserDao.mapColumns(result));
         issue.setCreated(result.getTimestamp("created"));
         issue.setUpdated(result.getTimestamp("updated"));
         issue.setEta(result.getDate("eta"));
@@ -176,9 +162,9 @@
     }
 
     @Override
-    public void save(Issue instance) throws SQLException {
+    public void save(Issue instance, Project project) throws SQLException {
         Objects.requireNonNull(instance.getSubject());
-        Objects.requireNonNull(instance.getProject());
+        instance.setProject(project);
         insert.setInt(1, instance.getProject().getId());
         insert.setString(2, instance.getStatus().name());
         insert.setString(3, instance.getCategory().name());
@@ -275,7 +261,7 @@
                 comment.setUpdated(result.getTimestamp("updated"));
                 comment.setUpdateCount(result.getInt("updatecount"));
                 comment.setComment(result.getString("comment"));
-                comment.setAuthor(obtainUser(result));
+                comment.setAuthor(PGUserDao.mapColumns(result));
                 comments.add(comment);
             }
         }