Fix delete function with running job associated

User should not delete a function with running jobs associated.

Change-Id: I627ac7ef057768e7c2d99f56e17da9eacbf4ad76

qinling/api/controllers/v1/function.py

@@ -174,8 +174,12 @@ class FunctionsController(rest.RestController):
 
         with db_api.transaction():
             func_db = db_api.get_function(id)
-            source = func_db.code['source']
+            if len(func_db.jobs) > 0:
+                raise exc.NotAllowedException(
+                    'The function is still associated with running job(s).'
+                )
 
+            source = func_db.code['source']
             if source == 'package':
                 self.storage_provider.delete(context.get_ctx().projectid, id)
 

qinling/db/sqlalchemy/models.py

@@ -106,7 +106,20 @@ class Job(model_base.QinlingSecureModelBase):
 
 
 # Delete service mapping automatically when deleting function.
-Function.service = relationship("FunctionServiceMapping", uselist=False,
+Function.service = relationship(
-                                cascade="all, delete-orphan")
+    "FunctionServiceMapping",
+    uselist=False,
+    cascade="all, delete-orphan"
+)
+
 Runtime.functions = relationship("Function", back_populates="runtime")
-Function.jobs = relationship("Job", back_populates="function")
+
+# Only get jobs
+Function.jobs = relationship(
+    "Job",
+    back_populates="function",
+    primaryjoin=(
+        "and_(Function.id==Job.function_id, "
+        "~Job.status.in_(['done', 'cancelled']))"
+    )
+)

qinling/tests/unit/api/controllers/v1/test_function.py

@@ -12,11 +12,13 @@
 #    See the License for the specific language governing permissions and
 #    limitations under the License.
 
+from datetime import datetime
 import json
 import tempfile
 
 import mock
 
+from qinling import status
 from qinling.tests.unit.api import base
 from qinling.tests.unit import base as unit_base
 
@@ -118,3 +120,23 @@ class TestFunctionController(base.APITest):
             unit_base.DEFAULT_PROJECT_ID, db_func.id
         )
         mock_delete_func.assert_called_once_with(db_func.id)
+
+    def test_delete_with_running_job(self):
+        db_func = self.create_function(
+            runtime_id=self.runtime_id, prefix=TEST_CASE_NAME
+        )
+        self.create_job(
+            function_id=db_func.id,
+            prefix=TEST_CASE_NAME,
+            status=status.AVAILABLE,
+            first_execution_time=datetime.utcnow(),
+            next_execution_time=datetime.utcnow(),
+            count=1
+        )
+
+        resp = self.app.delete(
+            '/v1/functions/%s' % db_func.id,
+            expect_errors=True
+        )
+
+        self.assertEqual(403, resp.status_int)