You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
 
 
 
 

59 lines
1.9 KiB

from functools import partial
from django.db.models.query import QuerySet
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 DjangoConnectionField(ConnectionField):
def __init__(self, *args, **kwargs):
self.on = kwargs.pop('on', False)
return 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):
_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 ConnectionField(*args, **kwargs)