Fix bug in getting merged pull request by commit (#32079)

routers/api/v1/api.go

@@ -1274,6 +1274,8 @@ func Routes() *web.Route {
 					m.Group("/{ref}", func() {
 						m.Get("/status", repo.GetCombinedCommitStatusByRef)
 						m.Get("/statuses", repo.GetCommitStatusesByRef)
+					}, context.ReferencesGitRepo())
+					m.Group("/{sha}", func() {
 						m.Get("/pull", repo.GetCommitPullRequest)
 					}, context.ReferencesGitRepo())
 				}, reqRepoReader(unit.TypeCode))

routers/api/v1/repo/commits.go

@@ -325,11 +325,11 @@ func DownloadCommitDiffOrPatch(ctx *context.APIContext) {
 	}
 }
 
-// GetCommitPullRequest returns the pull request of the commit
+// GetCommitPullRequest returns the merged pull request of the commit
 func GetCommitPullRequest(ctx *context.APIContext) {
 	// swagger:operation GET /repos/{owner}/{repo}/commits/{sha}/pull repository repoGetCommitPullRequest
 	// ---
-	// summary: Get the pull request of the commit
+	// summary: Get the merged pull request of the commit
 	// produces:
 	// - application/json
 	// parameters:

tests/integration/api_pull_test.go

@@ -334,3 +334,19 @@ func doAPIGetPullFiles(ctx APITestContext, pr *api.PullRequest, callback func(*t
 		}
 	}
 }
+
+func TestAPICommitPullRequest(t *testing.T) {
+	defer tests.PrepareTestEnv(t)()
+	repo := unittest.AssertExistsAndLoadBean(t, &repo_model.Repository{ID: 1})
+	owner := unittest.AssertExistsAndLoadBean(t, &user_model.User{ID: repo.OwnerID})
+
+	ctx := NewAPITestContext(t, "user2", repo.Name, auth_model.AccessTokenScopeReadRepository)
+
+	mergedCommitSHA := "1a8823cd1a9549fde083f992f6b9b87a7ab74fb3"
+	req := NewRequestf(t, "GET", "/api/v1/repos/%s/%s/commits/%s/pull", owner.Name, repo.Name, mergedCommitSHA).AddTokenAuth(ctx.Token)
+	ctx.Session.MakeRequest(t, req, http.StatusOK)
+
+	invalidCommitSHA := "abcd1234abcd1234abcd1234abcd1234abcd1234"
+	req = NewRequestf(t, "GET", "/api/v1/repos/%s/%s/commits/%s/pull", owner.Name, repo.Name, invalidCommitSHA).AddTokenAuth(ctx.Token)
+	ctx.Session.MakeRequest(t, req, http.StatusNotFound)
+}