Don't delete branch if other PRs with this branch are open (#18164)

fix #18149

Signed-off-by: a1012112796 <1012112796@qq.com>

models/pull_list.go

@@ -59,6 +59,16 @@ func GetUnmergedPullRequestsByHeadInfo(repoID int64, branch string) ([]*PullRequ
 		Find(&prs)
 }
 
+// HasUnmergedPullRequestsByHeadInfo checks if there are open and not merged pull request
+// by given head information (repo and branch)
+func HasUnmergedPullRequestsByHeadInfo(repoID int64, branch string) (bool, error) {
+	return db.GetEngine(db.DefaultContext).
+		Where("head_repo_id = ? AND head_branch = ? AND has_merged = ? AND issue.is_closed = ? AND flow = ?",
+			repoID, branch, false, false, PullRequestFlowGithub).
+		Join("INNER", "issue", "issue.id = pull_request.issue_id").
+		Exist(&PullRequest{})
+}
+
 // GetUnmergedPullRequestsByBaseInfo returns all pull requests that are open and has not been merged
 // by given base information (repo and branch).
 func GetUnmergedPullRequestsByBaseInfo(repoID int64, branch string) ([]*PullRequest, error) {

models/pull_test.go

@@ -107,6 +107,18 @@ func TestGetUnmergedPullRequest(t *testing.T) {
 	assert.True(t, IsErrPullRequestNotExist(err))
 }
 
+func TestHasUnmergedPullRequestsByHeadInfo(t *testing.T) {
+	assert.NoError(t, unittest.PrepareTestDatabase())
+
+	exist, err := HasUnmergedPullRequestsByHeadInfo(1, "branch2")
+	assert.NoError(t, err)
+	assert.Equal(t, true, exist)
+
+	exist, err = HasUnmergedPullRequestsByHeadInfo(1, "not_exist_branch")
+	assert.NoError(t, err)
+	assert.Equal(t, false, exist)
+}
+
 func TestGetUnmergedPullRequestsByHeadInfo(t *testing.T) {
 	assert.NoError(t, unittest.PrepareTestDatabase())
 	prs, err := GetUnmergedPullRequestsByHeadInfo(1, "branch2")