graphql/dataloader

nested queries and info

Open

#272 opened on May 30, 2021

View on GitHub
 (1 comment) (2 reactions) (0 assignees)JavaScript (12,520 stars) (556 forks)batch import
help wanted

Description

I have a query that looks like this:

movies {
  name
  actors {
    firstname
    lastname
    movies {
      name
    }
  }
}

at the moment it is very easy for me to use the dataloader to query the actors of each movie but I have two problems:

  1. how do I use the dataloader to query the children of the children? In my case the movies of an actor
  2. how can I pass the parsed info data (so I know what fields are queried) to the dataloader, without reparsing the info, because as you know, the children-resolver is invoked for each parent

would be nice to see a simple example thanks in advanced!

Contributor guide

Tech stack
javascriptnodejs
Domain
backendapi
Issue type
documentation
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
under 1 hour
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
needs investigation
Prerequisites
basic knowledge of GraphQLfamiliarity with DataLoader
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
80
Research direction
This issue requests an example of using DataLoader with nested queries and passing parsed GraphQL info to avoid re parsing. To address it, look at how batched loading can be applied in a nested resolver context, possibly referencing existing examples in the DataLoader documentation or community solutions. Consider implementing a simple demo that shows loading actors and their nested movies using a parent child key pattern.