Add StreamField serializer

client/src/graphql/gql/moduleDetailsQuery.gql

@@ -35,6 +35,7 @@ query ModulesQuery($slug: String!) {
                     slug
                     title
                     type
+                    contents
                   }
                 }
               }

server/api/graphene_wagtail.py

@@ -0,0 +1,19 @@
+# mysite/api/graphene_wagtail.py
+# Taken from https://github.com/patrick91/wagtail-ql/blob/master/backend/graphene_utils/converter.py and slightly adjusted
+
+from graphene.types import Scalar
+from graphene_django.converter import convert_django_field
+from wagtail.core.fields import StreamField
+
+
+class GenericStreamFieldType(Scalar):
+    @staticmethod
+    def serialize(stream_value):
+        return stream_value.stream_data
+
+
+@convert_django_field.register(StreamField)
+def convert_stream_field(field, registry=None):
+    return GenericStreamFieldType(
+        description=field.help_text, required=not field.null
+    )

server/api/schema.py

@@ -1,6 +1,7 @@
 import graphene
 from django.conf import settings
 from graphene_django.debug import DjangoDebug
+from api import graphene_wagtail
 
 from book.schema import BookQuery
 from objectives.schema import ObjectivesQuery

server/book/schema.py

@@ -10,7 +10,7 @@ class ContentBlockNode(DjangoObjectType):
     class Meta:
         model = ContentBlock
         only_fields = [
-            'slug', 'title', 'type'
+            'slug', 'title', 'type', 'contents'
         ]
         filter_fields = [
             'slug', 'title',