Question about RANGE_ADD mutation_type about absinthe_relay HOT 4 CLOSED

I'm closing this as stale / out of scope, as it's really more a question about Relay's JS side (and questions like this are probably better addressed in Slack).

from absinthe_relay.

In your example, couldn't you do:

cursor = Connection.offset_to_cursor(length(faction.ships) - 1)

Assuming the new resource is the last one in the collection. Otherwise:

cursor = faction.ships
|> Enum.find_index(fn(x) -> x == ship end)
|> Connection.offset_to_cursor

from absinthe_relay.

Maybe yes @panayi ... at the moment I was writing the example I believe I didn't know about the function Connection.offset_to_cursor.

Anyway, the idea, based on the Javascript implementation is to return the cursor for the recently added object and thus, I believe your latter suggestion seems more appropriate in case someone else is adding ships to a faction.

from absinthe_relay.

Hello again.

I have some more questions regarding RANGE_ADD mutation. Suppose I have the following mutation in Relay

import Relay from 'react-relay';

export default class AddMemberMutation extends Relay.Mutation {
  getMutation() {
    return Relay.QL`mutation {addMember}`;
  }

  getVariables() {
    const { member } = this.props;

    return {
      ...member
    };
  }

  getFatQuery() {
    return Relay.QL`
      fragment on AddMemberPayload {
        club { members },
        newMemberEdge,
        errors
      }`;
  }

  getConfigs() {
    return [{
      type: 'RANGE_ADD',
      parentName: 'club',
      parentID: this.props.club.id,
      connectionName: 'members',
      edgeName: 'newMemberEdge',
      rangeBehaviors: {
        '': 'append'
        'status(active)': 'prepend'
      }
    }];
  }
}

I'm trying to understand the following:

a. How do we know the page info to be used to return the Club's membersConnection in the mutation?. For example, Connection.from_query needs some page info like first: 10 to know what "page" to return.
b. Supposing I figured out what connection to return, how can determine the cursor of the newMemberEdge without having to cycle through the edges to find the corresponding member?

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