Graphene is a Python library for creating GraphQL schemas/types easly. It maps the models/fields to internal GraphQL objects without effort. Including automatic Django models conversion.
Installation
For instaling graphene, just run this command in your shell
pip install grapheneUsage
Example code of a GraphQL schema using Graphene:
Schema definition
class Character(graphene.Interface):
id = graphene.IDField()
name = graphene.StringField()
friends = graphene.ListField('self')
def resolve_friends(self, args, *_):
return [Human(f) for f in self.instance.friends]
class Human(Character):
homePlanet = graphene.StringField()
class Query(graphene.ObjectType):
human = graphene.Field(Human)
schema = graphene.Schema(query=Query)Querying
Querying graphene.Schema is as simple as:
query = '''
query HeroNameQuery {
hero {
name
}
}
'''
result = schema.execute(query)Relay Schema
Graphene also supports Relay, check the Starwars Relay example!
class Ship(relay.Node):
'''A ship in the Star Wars saga'''
name = graphene.StringField(description='The name of the ship.')
@classmethod
def get_node(cls, id):
return Ship(getShip(id))
class Query(graphene.ObjectType):
ships = relay.ConnectionField(Ship, description='The ships used by the faction.')
node = relay.NodeField()
@resolve_only_args
def resolve_ships(self):
return [Ship(s) for s in getShips()]Django+Relay Schema
If you want to use graphene with your Django Models check the Starwars Django example!
class Ship(DjangoNode):
class Meta:
model = YourDjangoModelHere
# only_fields = ('id', 'name') # Only map this fields from the model
# excluxe_fields ('field_to_excluxe', ) # Exclude mapping this fields from the model
class Query(graphene.ObjectType):
node = relay.NodeField()Contributing
After cloning this repo, ensure dependencies are installed by running:
python setup.py installAfter developing, the full test suite can be evaluated by running:
python setup.py test # Use --pytest-args="-v -s" for verbose mode3 maintainers
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