Added support for self reference of MongoengineConnectionField for non db fields

eg;

class Person(Document)
    first_name = mongoengine.StringField(required=True)
    last_name = mongoengine.StringField(required=True)

class Person(MongoengineObjectType):
    class Meta:
        model = models.Person
        interfaces = (Node,)

    friends_suggestions = MongoengineConnectionField("Person")

    def resolve_fiends_suggestions(self,info,**kwargs):
        return Person.objects.no_dereference.all()

Author: arunsureshkumar

graphene_mongo/fields.py

@@ -7,6 +7,7 @@
 import mongoengine
 from bson import DBRef
 from graphene import Context
+from graphene.types.utils import get_type
 from graphene.utils.str_converters import to_snake_case
 from graphql import ResolveInfo
 from promise import Promise
@@ -188,6 +189,7 @@ def get_reference_field(r, kv):
 
     @property
     def fields(self):
+        self._type = get_type(self._type)
         return self._type._meta.fields
 
     def get_queryset(self, model, info, required_fields=list(), skip=None, limit=None, reversed=False, **args):
@@ -236,14 +238,13 @@ def get_queryset(self, model, info, required_fields=list(), skip=None, limit=Non
 
     def default_resolver(self, _root, info, required_fields=list(), **args):
         args = args or {}
-
         if _root is not None:
             field_name = to_snake_case(info.field_name)
-            if getattr(_root, field_name, []) is not None:
-                args["pk__in"] = [r.id for r in getattr(_root, field_name, [])]
+            if field_name in _root._fields_ordered:
+                if getattr(_root, field_name, []) is not None:
+                    args["pk__in"] = [r.id for r in getattr(_root, field_name, [])]
 
         _id = args.pop('id', None)
-
         if _id is not None:
             args['pk'] = from_global_id(_id)[-1]
         iterables = []
@@ -257,10 +258,6 @@ def default_resolver(self, _root, info, required_fields=list(), **args):
             after = cursor_to_offset(args.pop("after", None))
             last = args.pop("last", None)
             before = cursor_to_offset(args.pop("before", None))
-            if after is not None:
-                has_previous_page = after > 0
-            elif (before is not None and last is not None):
-                has_previous_page = before - last <= 0
             if "pk__in" in args and args["pk__in"]:
                 count = len(args["pk__in"])
                 skip, limit, reverse = find_skip_and_limit(first=first, last=last, after=after, before=before,
@@ -278,7 +275,7 @@ def default_resolver(self, _root, info, required_fields=list(), **args):
                     if not info.context:
                         info.context = Context()
                     info.context.queryset = self.get_queryset(self.model, info, required_fields, **args)
-            elif _root is None:
+            else:
                 count = self.get_queryset(self.model, info, required_fields, **args).count()
                 if count != 0:
                     skip, limit, reverse = find_skip_and_limit(first=first, after=after, last=last, before=before,
@@ -301,7 +298,6 @@ def default_resolver(self, _root, info, required_fields=list(), **args):
                                                connection_type=self.type,
                                                edge_type=self.type.Edge,
                                                pageinfo_type=graphene.PageInfo)
-
         connection.iterable = iterables
         connection.list_length = list_length
         return connection