ES Request Template - Mutation Return Type

[sid88in]

Schema:

type Tweet {
  tweet: String
}

type Mutation {
  # Create a tweet for a user
  createUserTweet(
    name: String!,
    screen_name: String!,
    location: String!,
    description: String!,
    followers_count: Int!,
    friends_count: Int!,
    favourites_count: Int!,
    post: String!
  ): Tweets

}

type Tweets {
  name: String!
  screen_name: String!
  location: String!
  description: String!
  followers_count: Int!
  friends_count: Int!
  favourites_count: Int!
  posts: [Tweet]
}

schema {
  mutation: Mutation
}

Request Template:

{
    "version":"2017-02-28",
    "operation":"PUT",
    "path":"/user/twitter/$util.autoId()",
    "params":{
        "body":{
            "name":"$context.arguments.name",
            "screen_name":"$context.arguments.screen_name",
            "location":"$context.arguments.location",
            "description":"$context.arguments.description",
            "followers_count":$context.arguments.followers_count,
            "friends_count":$context.arguments.friends_count,
            "favourites_count":$context.arguments.favourites_count,
            "tweet": "$context.arguments.post"
        }
    }
}

Response Template:

$utils.toJson($context.result.get("_source"))

Query:

Question:

1. Not sure why I am getting output in the first place because ES response doesn't have _source fields.

2. Because I am getting the response (as pointed in 1) not sure why posts is null?

3. In this mutation, all I should need is screen_name and tweet but I have to post other fields as well because I don't know a way to first GET the fields for a given screen name and then use those fields in the PUT object in response mapping as pointed in Multiple Operations in the same appsync request template #17

any help would be great.
thanks
Sid

[sid88in]

Interestingly what works is this:

Request mapping template:

{
    "version":"2017-02-28",
    "operation":"PUT",
    "path":"/user/twitter/$util.autoId()",
    "params":{
        "body":{
            "name":"$context.arguments.name",
            "screen_name":"$context.arguments.screen_name",
            "location":"$context.arguments.location",
            "description":"$context.arguments.description",
            "followers_count":$context.arguments.followers_count,
            "friends_count":$context.arguments.friends_count,
            "favourites_count":$context.arguments.favourites_count,
            "posts": [{"tweet": "$context.arguments.post"}]
        }
    }
}

Query:

But my ES schema doesn't have posts object (in the first screenshot). So is there no way we can do this mapping in the response mapping layer?

[sid88in]

last solution worked so closing this ticket.