Add SQLAlchemyList and SQLAlchemyMutation types

This brings default support for fields filtering and ordering on queries and mutations.

Author: Toilal

graphene_sqlalchemy/mutations.py

@@ -0,0 +1,27 @@
+from graphene_sqlalchemy.types import SQLAlchemyMutation
+
+
+def create(of_type):
+    class CreateModel(SQLAlchemyMutation):
+        class Meta:
+            model = of_type._meta.model
+            create = True
+        Output = of_type
+    return CreateModel.Field()
+
+
+def update(of_type):
+    class UpdateModel(SQLAlchemyMutation):
+        class Meta:
+            model = of_type._meta.model
+        Output = of_type
+    return UpdateModel.Field()
+
+
+def delete(of_type):
+    class DeleteModel(SQLAlchemyMutation):
+        class Meta:
+            model = of_type._meta.model
+            delete = True
+        Output = of_type
+    return DeleteModel.Field()

graphene_sqlalchemy/tests/conftest.py

@@ -0,0 +1,7 @@
+import pytest
+from sqlalchemy import create_engine
+
+
+@pytest.fixture(scope='session')
+def db():
+    return create_engine('sqlite:///test_sqlalchemy.sqlite3')

graphene_sqlalchemy/tests/test_mutations.py

@@ -0,0 +1,80 @@
+import graphene
+import pytest
+from sqlalchemy.orm import scoped_session, sessionmaker
+
+from graphene_sqlalchemy import SQLAlchemyObjectType
+from graphene_sqlalchemy.mutations import create
+from graphene_sqlalchemy.registry import reset_global_registry
+from graphene_sqlalchemy.tests.models import Base, Reporter
+
+
+@pytest.yield_fixture(scope='function')
+def session(db):
+    reset_global_registry()
+    connection = db.engine.connect()
+    transaction = connection.begin()
+    Base.metadata.create_all(connection)
+
+    # options = dict(bind=connection, binds={})
+    session_factory = sessionmaker(bind=connection)
+    session = scoped_session(session_factory)
+
+    yield session
+
+    # Finalize test here
+    transaction.rollback()
+    connection.close()
+    session.remove()
+
+
+def test_should_create_with_create_fields(session):
+    class ReporterType(SQLAlchemyObjectType):
+        class Meta:
+            model = Reporter
+
+    class Query(graphene.ObjectType):
+        reporters = graphene.List(ReporterType)
+
+        def resolve_reporters(self, *args, **kwargs):
+            return session.query(Reporter)
+
+    class Mutation(graphene.ObjectType):
+        createReporter = create(ReporterType)
+
+    query = '''
+        query ReporterQuery {
+          reporters {
+            firstName,
+            lastName,
+            email
+          }
+        }
+    '''
+    expected = {
+        'reporters': []
+    }
+    schema = graphene.Schema(query=Query, mutation=Mutation)
+    result = schema.execute(query)
+    assert not result.errors
+    assert result.data == expected
+
+    query = '''
+        mutation createReporter{
+            createReporter (firstName: "ABC", lastName: "def") {
+                firstName,
+                lastName,
+                email
+            }
+        }
+    '''
+    expected = {
+        'createReporter': {
+            'firstName': 'ABC',
+            'lastName': 'def',
+            'email': None,
+        }
+    }
+    schema = graphene.Schema(query=Query, mutation=Mutation)
+    result = schema.execute(query, context_value={'session': session})
+    assert not result.errors
+    assert result.data == expected