Replace promises.dataloader with aiodataloader

Author: richin13

graphene_sqlalchemy/batching.py

@@ -1,5 +1,5 @@
+import aiodataloader
 import sqlalchemy
-from promise import dataloader, promise
 from sqlalchemy.orm import Session, strategies
 from sqlalchemy.orm.query import QueryContext
 
@@ -10,10 +10,10 @@ def get_batch_resolver(relationship_prop):
     # This is so SQL string generation is cached under-the-hood via `bakery`
     selectin_loader = strategies.SelectInLoader(relationship_prop, (('lazy', 'selectin'),))
 
-    class RelationshipLoader(dataloader.DataLoader):
+    class RelationshipLoader(aiodataloader.DataLoader):
         cache = False
 
-        def batch_load_fn(self, parents):  # pylint: disable=method-hidden
+        async def batch_load_fn(self, parents):
             """
             Batch loads the relationships of all the parents as one SQL statement.
 
@@ -62,11 +62,11 @@ def batch_load_fn(self, parents):  # pylint: disable=method-hidden
                 child_mapper,
             )
 
-            return promise.Promise.resolve([getattr(parent, relationship_prop.key) for parent in parents])
+            return [getattr(parent, relationship_prop.key) for parent in parents]
 
     loader = RelationshipLoader()
 
-    def resolve(root, info, **args):
-        return loader.load(root)
+    async def resolve(root, info, **args):
+        return await loader.load(root)
 
     return resolve

setup.cfg

@@ -9,7 +9,7 @@ max-line-length = 120
 no_lines_before=FIRSTPARTY
 known_graphene=graphene,graphql_relay,flask_graphql,graphql_server,sphinx_graphene_theme
 known_first_party=graphene_sqlalchemy
-known_third_party=app,database,flask,models,nameko,pkg_resources,promise,pytest,schema,setuptools,sqlalchemy,sqlalchemy_utils
+known_third_party=aiodataloader,app,database,flask,models,nameko,pkg_resources,promise,pytest,schema,setuptools,sqlalchemy,sqlalchemy_utils
 sections=FUTURE,STDLIB,THIRDPARTY,GRAPHENE,FIRSTPARTY,LOCALFOLDER
 skip_glob=examples/nameko_sqlalchemy
 

setup.py

@@ -13,10 +13,10 @@
 
 requirements = [
     # To keep things simple, we only support newer versions of Graphene
-    "graphene>=3.0b5",
+    "graphene>=3.0.0b7",
     "promise>=2.3",
-    # Tests fail with 1.0.19
     "SQLAlchemy>=1.1,<2.0",
+    "aiodataloader>=0.2.0,<1.0",
 ]
 
 tests_require = [