Added field description based on function doc

graphene/core/fields.py

@@ -91,7 +91,6 @@ class Field(object):
             field_type = GraphQLNonNull(field_type)
         return field_type
 
-    @memoize
     def internal_type(self, schema):
         field_type = self.field_type
         if isinstance(field_type, Field):
@@ -127,8 +126,11 @@ class Field(object):
         if not internal_type:
             raise Exception("Internal type for field %s is None" % self)
 
+        description = self.description
         resolve_fn = self.get_resolve_fn()
         if resolve_fn:
+            description = resolve_fn.__doc__ or description
+
             @wraps(resolve_fn)
             def resolver(*args):
                 return self.resolve(*args)
@@ -136,7 +138,7 @@ class Field(object):
             resolver = self.resolve
         return GraphQLField(
             internal_type,
-            description=self.description,
+            description=description,
             args=self.args,
             resolver=resolver,
         )

tests/core/test_fields.py

@@ -24,12 +24,10 @@ from graphene.core.types import ObjectType
 class ObjectType(object):
     _meta = Options()
 
-    def resolve(self, *args, **kwargs):
+    def resolve_customdoc(self, *args, **kwargs):
+        '''Resolver documentation'''
         return None
 
-    def can_resolve(self, *args):
-        return True
-
     def __str__(self):
         return "ObjectType"
 
@@ -172,3 +170,10 @@ def test_field_repr_contributed():
     f = StringField()
     f.contribute_to_class(ot, 'field_name')
     assert repr(f) == "<graphene.core.fields.StringField: field_name>"
+
+
+def test_field_resolve_objecttype_cos():
+    f = StringField()
+    f.contribute_to_class(ot, 'customdoc')
+    field = f.internal_field(schema)
+    assert field.description == 'Resolver documentation'