mirror of
https://github.com/graphql-python/graphene.git
synced 2024-11-26 03:23:55 +03:00
103 lines
2.6 KiB
Markdown
103 lines
2.6 KiB
Markdown
#  [Graphene](http://graphene-python.org) [](https://travis-ci.org/graphql-python/graphene) [](https://coveralls.io/github/graphql-python/graphene?branch=master)
|
|
|
|
|
|
Graphene is a Python library for building GraphQL schemas/types fast and easily.
|
|
* **Easy to use:** It maps the models/fields to internal GraphQL objects without effort.
|
|
* **Relay:** Graphene has builtin support for Relay
|
|
* **Django:** Automatic [Django models](#djangorelay-schema) conversion. *See an [example Django](http://github.com/graphql-python/swapi-graphene) implementation*
|
|
|
|
|
|
## Installation
|
|
|
|
For instaling graphene, just run this command in your shell
|
|
|
|
```bash
|
|
pip install graphene
|
|
```
|
|
|
|
|
|
## Usage
|
|
|
|
Example code of a GraphQL schema using Graphene:
|
|
|
|
### Schema definition
|
|
|
|
```python
|
|
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)
|
|
```
|
|
|
|
Then Querying `graphene.Schema` is as simple as:
|
|
|
|
```python
|
|
query = '''
|
|
query HeroNameQuery {
|
|
hero {
|
|
name
|
|
}
|
|
}
|
|
'''
|
|
result = schema.execute(query)
|
|
```
|
|
|
|
### Relay Schema
|
|
|
|
Graphene also supports Relay, check the [Starwars Relay example](tests/starwars_relay)!
|
|
|
|
```python
|
|
class Ship(relay.Node):
|
|
name = graphene.StringField()
|
|
|
|
@classmethod
|
|
def get_node(cls, id):
|
|
return Ship(your_ship_instance)
|
|
|
|
|
|
class Query(graphene.ObjectType):
|
|
ships = relay.ConnectionField(Ship)
|
|
node = relay.NodeField()
|
|
|
|
```
|
|
|
|
### Django+Relay Schema
|
|
|
|
If you want to use graphene with your Django Models check the [Starwars Django example](tests/starwars_django)!
|
|
|
|
```python
|
|
class Ship(DjangoNode):
|
|
class Meta:
|
|
model = YourDjangoModelHere
|
|
# only_fields = ('id', 'name') # Only map this fields from the model
|
|
# exclude_fields ('field_to_exclude', ) # 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:
|
|
|
|
```sh
|
|
python setup.py install
|
|
```
|
|
|
|
After developing, the full test suite can be evaluated by running:
|
|
|
|
```sh
|
|
python setup.py test # Use --pytest-args="-v -s" for verbose mode
|
|
```
|