feat: add in schema.py resolver fro _server

schemas/core.graphql

@@ -1,4 +1,5 @@
 scalar DateTime
+
 type _Service {
     sdl: String
 }
@@ -236,6 +237,8 @@ type Query {
   topicsRandom(amount: Int): [Topic]!
   topicsByCommunity(community: String!): [Topic]!
   topicsByAuthor(author: String!): [Topic]!
+
+  # Apollo SDL
   _service: _Service!
 }
 

services/schema.py

@@ -10,5 +10,13 @@ def serialize_datetime(value):
 
 
 query = QueryType()
+
+@query.field("_service")
+def resolve_service(*_):
+    print("Inside the _service resolver")
+    # For now, return a placeholder SDL.
+    sdl = "type Query { _service: _Service } type _Service { sdl: String }"
+    return {"sdl": sdl}
+    
 mutation = MutationType()
 resolvers = [query, mutation, datetime_scalar]