Merge pull request #30 from gary-liguoliang/master

support more str based pydantic types

Author: necaris

graphene_pydantic/converters.py

@@ -123,7 +123,7 @@ def convert_pydantic_type(
         # TODO: _should_ Sets remain here?
         return List(graphene_type)
     elif field.shape in SHAPE_MAPPING:
-        raise ConversionError(f"Don't know how to handle mappings in Graphene.")
+        raise ConversionError("Don't know how to handle mappings in Graphene.")
 
 
 def find_graphene_type(
@@ -193,6 +193,8 @@ def find_graphene_type(
         )
     elif issubclass(type_, enum.Enum):
         return Enum.from_enum(type_)
+    elif issubclass(type_, str):
+        return String
     else:
         raise ConversionError(
             f"Don't know how to convert the Pydantic field {field!r} ({field.type_})"