Correctly propagate help_text as description for many-to-* relations (#579)

* Correctly propagate help_text as description for many-to-* relations

* Trigger build

Author: Alexandre Kirszenberg

graphene_django/converter.py

@@ -177,6 +177,8 @@ def dynamic_type():
         if not _type:
             return
 
+        description = field.help_text if isinstance(field, models.ManyToManyField) else field.field.help_text
+
         # If there is a connection, we should transform the field
         # into a DjangoConnectionField
         if _type._meta.connection:
@@ -186,11 +188,11 @@ def dynamic_type():
             if _type._meta.filter_fields or _type._meta.filterset_class:
                 from .filter.fields import DjangoFilterConnectionField
 
-                return DjangoFilterConnectionField(_type)
+                return DjangoFilterConnectionField(_type, description=description)
 
-            return DjangoConnectionField(_type)
+            return DjangoConnectionField(_type, description=description)
 
-        return DjangoListField(_type)
+        return DjangoListField(_type, description=description)
 
     return Dynamic(dynamic_type)