Change if condition

ChoiceType no longer relies on EnumMeta but instead it exposes a
``type_impl`` field that we can leverage to decide whether the internal
``choices`` is a tuple of enum members or a tuple of tuples (pairs)

Author: richin13

graphene_sqlalchemy/converter.py

@@ -1,4 +1,3 @@
-from enum import EnumMeta
 from functools import singledispatch
 
 from sqlalchemy import types
@@ -21,6 +20,11 @@
 except ImportError:
     ChoiceType = JSONType = ScalarListType = TSVectorType = object
 
+try:
+    from sqlalchemy_utils.types.choice import EnumTypeImpl
+except ImportError:
+    EnumTypeImpl = object
+
 
 is_selectin_available = getattr(strategies, 'SelectInLoader', None)
 
@@ -222,7 +226,7 @@ def convert_enum_to_enum(type, column, registry=None):
 @convert_sqlalchemy_type.register(ChoiceType)
 def convert_choice_to_enum(type, column, registry=None):
     name = "{}_{}".format(column.table.name, column.name).upper()
-    if isinstance(type.choices, EnumMeta):
+    if isinstance(type.type_impl, EnumTypeImpl):
         # type.choices may be Enum/IntEnum, in ChoiceType both presented as EnumMeta
         # do not use from_enum here because we can have more than one enum column in table
         return Enum(name, list((v.name, v.value) for v in type.choices))

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,graphql,models,nameko,pkg_resources,promise,pytest,schema,setuptools,sqlalchemy,sqlalchemy_utils
+known_third_party=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