mirror of
https://github.com/graphql-python/graphene-django.git
synced 2024-09-21 11:29:09 +03:00
79 lines
2.5 KiB
Python
79 lines
2.5 KiB
Python
from functools import partial
|
|
|
|
from django.db.models.query import QuerySet
|
|
|
|
from graphene.types import Field, List
|
|
from graphene.relay import ConnectionField, PageInfo
|
|
from graphql_relay.connection.arrayconnection import connection_from_list_slice
|
|
|
|
from .utils import DJANGO_FILTER_INSTALLED, maybe_queryset
|
|
|
|
|
|
class DjangoListField(Field):
|
|
|
|
def __init__(self, _type, *args, **kwargs):
|
|
super(DjangoListField, self).__init__(List(_type), *args, **kwargs)
|
|
|
|
@property
|
|
def model(self):
|
|
return self.type.of_type._meta.node._meta.model
|
|
|
|
@staticmethod
|
|
def list_resolver(resolver, root, args, context, info):
|
|
return maybe_queryset(resolver(root, args, context, info))
|
|
|
|
def get_resolver(self, parent_resolver):
|
|
return partial(self.list_resolver, parent_resolver)
|
|
|
|
|
|
class DjangoConnectionField(ConnectionField):
|
|
|
|
def __init__(self, *args, **kwargs):
|
|
self.on = kwargs.pop('on', False)
|
|
super(DjangoConnectionField, self).__init__(*args, **kwargs)
|
|
|
|
@property
|
|
def model(self):
|
|
return self.type._meta.node._meta.model
|
|
|
|
def get_manager(self):
|
|
if self.on:
|
|
return getattr(self.model, self.on)
|
|
else:
|
|
return self.model._default_manager
|
|
|
|
@staticmethod
|
|
def connection_resolver(resolver, connection, default_manager, root, args, context, info):
|
|
iterable = resolver(root, args, context, info)
|
|
if iterable is None:
|
|
iterable = default_manager
|
|
iterable = maybe_queryset(iterable)
|
|
if isinstance(iterable, QuerySet):
|
|
iterable &= maybe_queryset(default_manager)
|
|
_len = iterable.count()
|
|
else:
|
|
_len = len(iterable)
|
|
connection = connection_from_list_slice(
|
|
iterable,
|
|
args,
|
|
slice_start=0,
|
|
list_length=_len,
|
|
list_slice_length=_len,
|
|
connection_type=connection,
|
|
edge_type=connection.Edge,
|
|
pageinfo_type=PageInfo,
|
|
)
|
|
connection.iterable = iterable
|
|
connection.length = _len
|
|
return connection
|
|
|
|
def get_resolver(self, parent_resolver):
|
|
return partial(self.connection_resolver, parent_resolver, self.type, self.get_manager())
|
|
|
|
|
|
def get_connection_field(*args, **kwargs):
|
|
if DJANGO_FILTER_INSTALLED:
|
|
from .filter.fields import DjangoFilterConnectionField
|
|
return DjangoFilterConnectionField(*args, **kwargs)
|
|
return DjangoConnectionField(*args, **kwargs)
|