gatsby-source-wordpress - Unable to retrieve hierarchical data from WordPress

[sampokataja]

Preliminary Checks

• This issue is not a duplicate. Before opening a new issue, please search existing issues: https://github.com/gatsbyjs/gatsby/issues
• This issue is not a question, feature request, RFC, or anything other than a bug report directly related to Gatsby. Please post those things in GitHub Discussions: https://github.com/gatsbyjs/gatsby/discussions

Description

I am not able to retrieve hierarchical data from WordPress when using gatsby-source-wordpress package. I have tried with the newest version of Gatsby - only dependency being the aforementioned (version 7.11.0).

I also have the newest versions of WordPress (^6.2) and WPGraphQL-plugin (1.14.10) installed.

I do not have these issues when using the WPGraphQL provided IDE, only in https://localhost:8000/___graphql

I think these issues occured after: #37931 was fixed.

Reproduction Link

.

Steps to Reproduce

1. Install WordPress with WPGraphQL-plugin
2. Add parent > child relation between two Pages
3. Install Gatsby and gatsby-source-wordpress and do the necessary gatsby-config.js modifications
4. Run gatsby develop and navigate to https://localhost:8000/___graphql
5. Run query: query MyQuery { allWpPage { nodes { wpParent { node { id } } } } }
   ...

Expected Result

I should receive the queried fields

Actual Result

{
  "errors": [
    {
      "message": "Cannot read properties of undefined (reading 'type')",
      "locations": [
        {
          "line": 15,
          "column": 9
        }
      ],
      "path": [
        "wpPage",
        "wpParent",
        "node"
      ],

Environment

System:
    OS: macOS 13.3.1
    CPU: (12) x64 Intel(R) Core(TM) i7-9750H CPU @ 2.60GHz
    Shell: 5.9 - /bin/zsh
  Binaries:
    Node: 18.17.0 - ~/.nvm/versions/node/v18.17.0/bin/node
    Yarn: 1.17.3 - /usr/local/bin/yarn
    npm: 9.6.7 - ~/.nvm/versions/node/v18.17.0/bin/npm
  Browsers:
    Chrome: 115.0.5790.114
    Safari: 16.4
  npmPackages:
    gatsby: ^5.11.0 => 5.11.0 
    gatsby-plugin-image: ^3.11.0 => 3.11.0 
    gatsby-plugin-manifest: ^5.11.0 => 5.11.0 
    gatsby-plugin-sharp: ^5.11.0 => 5.11.0 
    gatsby-source-filesystem: ^5.11.0 => 5.11.0 
    gatsby-source-wordpress: ^7.11.0 => 7.11.0 
    gatsby-transformer-sharp: ^5.11.0 => 5.11.0 
  npmGlobalPackages:
    gatsby-cli: 5.11.0

Config Flags

No response