GraphQL helpers for Python.
CI status:
Schema definition
PyQL provides a better / cleaner syntax for defining GraphQL schemas.
Using PyQL:
from pyql import Schema
schema = Schema()
@schema.query.field('hello')
def resolve_hello(root, info, name: str = 'world') -> str:
return 'Hello {}'.format(name)
compiled = schema.compile()Equivalent using graphql-core:
from graphql import (
GraphQLObjectType, GraphQLField, GraphQLArgument, GraphQLString,
GraphQLSchema)
Query = GraphQLObjectType(
'Query',
fields=lambda: {
'hello': GraphQLField(
GraphQLString,
args={
'name': GraphQLArgument(
type=GraphQLString,
default_value='world',
),
},
resolver=lambda root, info, name = 'world': f'Hello, {name}'
),
}
)
schema = GraphQLSchema(query=Query)Graphene looks slightly better, but it’s quite confusing, and makes use of unncessary objects:
import graphene
class Query(graphene.ObjectType):
hello = graphene.Field(
graphene.String,
name=graphene.Argument(graphene.String))
def resolve_hello(self, info, name='world'):
return f'Hello {name}'
schema = graphene.Schema(query=Query)PyQL uses standard Python introspection when possible to figure out things, so eg. argument definitions can be picked up automatically from a resolver function, etc.
Limitations
While there are plans for field argument documentation to be picked up automatically from docstrings, it’s not currently implemented as reliably parsing docstrings is a non-trivial task.
1 maintainer
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