Fix relationship of function service mapping

When deleting function, the service mapping record should be
deleted automatically.

Provide a helper script for resource clean up.

Change-Id: Ie3db454b5bcfb74a0826f01c4626fb45fca58478

qinling/db/sqlalchemy/models.py

@@ -65,9 +65,6 @@ class FunctionServiceMapping(model_base.QinlingModelBase):
         sa.String(36),
         sa.ForeignKey(Function.id, ondelete='CASCADE'),
     )
-    function = relationship(
-        'Function', uselist=False, back_populates="service"
-    )
     service_url = sa.Column(sa.String(255), nullable=False)
 
 
@@ -111,8 +108,8 @@ class Job(model_base.QinlingSecureModelBase):
         return d
 
 
-Function.service = relationship("FunctionServiceMapping",
-                                uselist=False,
-                                back_populates="function")
+# Delete service mapping automatically when deleting function.
+Function.service = relationship("FunctionServiceMapping", uselist=False,
+                                cascade="all, delete-orphan")
 Runtime.functions = relationship("Function", back_populates="runtime")
 Function.jobs = relationship("Job", back_populates="function")

tools/clear_resources.sh

@@ -0,0 +1,34 @@
+#!/usr/bin/env
+set -e
+
+function delete_resources(){
+    # Delete jobs
+    ids=$(openstack job list -f yaml -c Id | awk '{print $3}')
+    for id in $ids
+    do
+        openstack job delete $id
+    done
+
+    # Delete executions
+    ids=$(openstack function execution list -f yaml -c Id | awk '{print $3}')
+    for id in $ids
+    do
+      openstack function execution delete $id
+    done
+
+    # Delete functions
+    ids=$(openstack function list -f yaml -c Id | awk '{print $3}')
+    for id in $ids
+    do
+      openstack function delete $id
+    done
+
+    # Delete runtimes
+    ids=$(openstack runtime list -f yaml -c Id | awk '{print $3}')
+    for id in $ids
+    do
+      openstack runtime delete $id
+    done
+}
+
+delete_resources