Store error: the application attempted to write an object with no provided id but the store already contains an id of...

Hey, Today in one of my applications I found this issue. I’m not sure if this is a bug or desired behaviour because I couldn’t find any information about it in the documentation.

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The fix is quite easy, just add id to the query without id.

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So the question is: should every query has defined id for a resource? It seems to work without id but when there will be the next query with defined id, this error appears.

I’m asking because I have a few other cases where external API doesn’t have id so this problem can appear again in the future.

Intended outcome: Error shouldn’t appear and application should render data.

Actual outcome: Error appears

Network error: Error writing result to store for query 

query PokemonQuery($id: ID) { 
  Pokemon(id: $id) { 
    name 
    url 
    createdAt 
  } 
}

Store error: the application attempted to write an object with no provided 
id but the store already contains an id of Pokemon:ciwnmyvxn94uo0161477dicbm 
for this object.

How to reproduce the issue: https://codesandbox.io/s/mom8ozyy9

Check checkbox in provided demo.

Version

• apollo-client@<1.6.0>

[jbaxleyiii]

Hey @hinok 👋

This error only should occur when you have made a query with an id field for a portion, then made another that returns what would be the same object, but is missing the id field.

We are planning on making this just a warning (instead of throwing) but it does help a lot to keep the id field included in queries that share fields

[WilledgeR]

You may forgot to select id in your query.

                post(id: $postID) {
                    id
                    comments(pagination: $pagination) {
                        edges {
                            node {
                                content
                            }
                            cursor
                        }
                        pageInfo {
                            endCursor
                        }
                    }
                }
            }```