[Backport] [API] Allow only specific Colums to be updated on Issue (#9539) (#9580)

* Fix #9189 - API Allow only specific Colums to be updated on Issue (#9539)

* dont insert "-1" in any case to issue.poster_id

* Make sure API cant override importand fields

* code format

* add Test for IssueEdit

* load milestone and return it on IssueEdit via API

* extend Test for TestAPIEditIssue

* fix TEST

* make sure Poster is loaded

* keep code format on backport as it is

integrations/api_issue_test.go

@@ -8,6 +8,7 @@ import (
 	"fmt"
 	"net/http"
 	"testing"
+	"time"
 
 	"code.gitea.io/gitea/models"
 	api "code.gitea.io/gitea/modules/structs"
@@ -62,3 +63,61 @@ func TestAPICreateIssue(t *testing.T) {
 		Title:      title,
 	})
 }
+
+func TestAPIEditIssue(t *testing.T) {
+	prepareTestEnv(t)
+
+	issueBefore := models.AssertExistsAndLoadBean(t, &models.Issue{ID: 9}).(*models.Issue)
+	repo := models.AssertExistsAndLoadBean(t, &models.Repository{ID: issueBefore.RepoID}).(*models.Repository)
+	owner := models.AssertExistsAndLoadBean(t, &models.User{ID: repo.OwnerID}).(*models.User)
+	assert.NoError(t, issueBefore.LoadAttributes())
+	assert.Equal(t, int64(1019307200), int64(issueBefore.DeadlineUnix))
+	assert.Equal(t, api.StateOpen, issueBefore.State())
+
+	session := loginUser(t, owner.Name)
+	token := getTokenForLoggedInUser(t, session)
+
+	// update values of issue
+	issueState := "closed"
+	removeDeadline := time.Unix(0, 0)
+	milestone := int64(4)
+	body := "new content!"
+	title := "new title from api set"
+
+	urlStr := fmt.Sprintf("/api/v1/repos/%s/%s/issues/%d?token=%s", owner.Name, repo.Name, issueBefore.Index, token)
+	req := NewRequestWithJSON(t, "PATCH", urlStr, api.EditIssueOption{
+		State:     &issueState,
+		Deadline:  &removeDeadline,
+		Milestone: &milestone,
+		Body:      &body,
+		Title:     title,
+
+		// ToDo change more
+	})
+	resp := session.MakeRequest(t, req, http.StatusCreated)
+	var apiIssue api.Issue
+	DecodeJSON(t, resp, &apiIssue)
+
+	issueAfter := models.AssertExistsAndLoadBean(t, &models.Issue{ID: 9}).(*models.Issue)
+
+	// check deleted user
+	assert.Equal(t, int64(500), issueAfter.PosterID)
+	assert.NoError(t, issueAfter.LoadAttributes())
+	assert.Equal(t, int64(-1), issueAfter.PosterID)
+	assert.Equal(t, int64(-1), issueBefore.PosterID)
+	assert.Equal(t, int64(-1), apiIssue.Poster.ID)
+
+	// API response
+	assert.Equal(t, api.StateClosed, apiIssue.State)
+	assert.Equal(t, milestone, apiIssue.Milestone.ID)
+	assert.Equal(t, body, apiIssue.Body)
+	assert.True(t, apiIssue.Deadline == nil)
+	assert.Equal(t, title, apiIssue.Title)
+
+	// in database
+	assert.Equal(t, api.StateClosed, issueAfter.State())
+	assert.Equal(t, milestone, issueAfter.MilestoneID)
+	assert.Equal(t, int64(0), int64(issueAfter.DeadlineUnix))
+	assert.Equal(t, body, issueAfter.Content)
+	assert.Equal(t, title, issueAfter.Title)
+}