"Sorting on fields that need arguments to resolve is deprecated" warning

Description

If I create a node field using createNodeField from a node value:

exports.onCreateNode = async ({node, actions: {createNodeField}}) => {
  if (node.internal.type === "MarkdownRemark") {
    createNodeField({
      node,
      name: "template",
      value:  node.frontmatter.template,
    })
  }
}

Then I want to use this field to group my nodes

query MyQuery {
  allMarkdownRemark {
    group(field: fields___template) {
      fieldValue
      totalCount
    }
  }
}

There is the following warning

If I use the original data (which is the same), everything is fine

query MyQuery {
  allMarkdownRemark {
    group(field: frontmatter___template) {
      fieldValue
      totalCount
    }
  }
}

Steps to reproduce

1. Create a node field
2. Try to group nodes by this field

Expected result

No warning, it should works

Actual result

Sorting on fields that need arguments to resolve is deprecated

Environment

System: OS: macOS 11.0.1 CPU: (4) x64 Intel® Core™ i5-4258U CPU @ 2.40GHz Shell: 5.8 - /bin/zsh Binaries: Node: 15.2.1 - /usr/local/bin/node Yarn: 1.22.10 - /usr/local/bin/yarn npm: 7.0.10 - /usr/local/bin/npm Languages: Python: 2.7.16 - /usr/bin/python Browsers: Chrome: 87.0.4280.88 Firefox: 72.0.2 Safari: 14.0.1 npmPackages: gatsby: ^2.28.0 => 2.28.0

[emmenko]

The “minimal blog theme” from @LekoArts uses those deprecated sorting fields:

https://github.com/LekoArts/gatsby-themes/blob/ea3eb0b4f6d49c99b2f209d0a9a504f3e3f1ce10/themes/gatsby-theme-minimal-blog-core/gatsby-node.js#L295-L299

I’m curious to hear from @LekoArts what’s the best way to migrate to v3 and avoid those deprecation warnings, while keeping the same functionality.

Thanks 🙏

[rejas]

Will do, thanks anyway!