Added clientMutationId field to relay.ClientIDMutation. Fixed #300

Author: syrusakbary

examples/starwars_relay/tests/test_objectidentification.py

@@ -25,6 +25,7 @@ def test_str_schema():
 type IntroduceShipPayload {
   ship: Ship
   faction: Faction
+  clientMutationId: String
 }
 
 type Mutation {

graphene/relay/mutation.py

@@ -21,6 +21,8 @@ def __new__(cls, name, bases, attrs):
 
         input_class = attrs.pop('Input', None)
         base_name = re.sub('Payload$', '', name)
+        if 'client_mutation_id' not in attrs:
+            attrs['client_mutation_id'] = String(name='clientMutationId')
         cls = ObjectTypeMeta.__new__(cls, '{}Payload'.format(base_name), bases, attrs)
         mutate_and_get_payload = getattr(cls, 'mutate_and_get_payload', None)
         if cls.mutate and cls.mutate.__func__ == ClientIDMutation.mutate.__func__:

graphene/relay/tests/test_mutation.py

@@ -71,14 +71,17 @@ class MyMutation(ClientIDMutation):
 
 def test_mutation():
     fields = SaySomething._meta.fields
-    assert list(fields.keys()) == ['phrase']
+    assert list(fields.keys()) == ['phrase', 'client_mutation_id']
     assert isinstance(fields['phrase'], Field)
     field = SaySomething.Field()
     assert field.type == SaySomething
     assert list(field.args.keys()) == ['input']
     assert isinstance(field.args['input'], Argument)
     assert isinstance(field.args['input'].type, NonNull)
     assert field.args['input'].type.of_type == SaySomething.Input
+    assert isinstance(fields['client_mutation_id'], Field)
+    assert fields['client_mutation_id'].name == 'clientMutationId'
+    assert fields['client_mutation_id'].type == String
 
 
 def test_mutation_input():
@@ -94,7 +97,7 @@ def test_mutation_input():
 
 def test_subclassed_mutation():
     fields = OtherMutation._meta.fields
-    assert list(fields.keys()) == ['name', 'my_node_edge']
+    assert list(fields.keys()) == ['name', 'my_node_edge', 'client_mutation_id']
     assert isinstance(fields['name'], Field)
     field = OtherMutation.Field()
     assert field.type == OtherMutation
@@ -126,7 +129,7 @@ def test_subclassed_mutation_input():
 
 def test_edge_query():
     executed = schema.execute(
-        'mutation a { other(input: {clientMutationId:"1"}) { myNodeEdge { cursor node { name }} } }'
+        'mutation a { other(input: {clientMutationId:"1"}) { clientMutationId, myNodeEdge { cursor node { name }} } }'
     )
     assert not executed.errors
-    assert dict(executed.data) == {'other': {'myNodeEdge': {'cursor': '1', 'node': {'name': 'name'}}}}
+    assert dict(executed.data) == {'other': {'clientMutationId': '1', 'myNodeEdge': {'cursor': '1', 'node': {'name': 'name'}}}}