PostFormat is not set when Contribute/Author uses createPost or updatePost mutations

[tuanfront-end]

Description

Use createPost and updatePost mutations to create a new post and update the post with input postFormats:

1. If the user has the admin role then everything works as expected, postFormat will be set up properly.
2. If the user has the Contribute/Author role then postFormat will not be set correctly:

• With createPost mutation, postFormat will always be empty [].
• With updatePost mutation, postFormat will always keep its old value.

Steps to reproduce

1. I use Faustjs for my project, and use the useLogin feature for login
2. Try logging in with accounts with different roles and test with this query:

mutation MyMutation {
  createPost(
    input: {title: "This is title", postFormats: {append: false, nodes: {name: "video"}}}
  ) {
    post {
      title
      id
      postFormats {
        nodes {
          id
          name
          slug
        }
      }
    }
  }
}

Additional context

No response

WPGraphQL Version

1.26.0

WordPress Version

6.5.3

PHP Version

7.4

Additional environment details

No response

Please confirm that you have searched existing issues in the repo.

• Yes

Please confirm that you have disabled ALL plugins except for WPGraphQL.

• Yes
• My issue is with compatibility with a specific WordPress plugin, and I have listed all my installed plugins (and version info) above.

[jasonbahl]

@tuanfront-end is there an error returned? Does the postFormats field exist in the schema but it's not resolving? or is it not in the Schema at all?

Can you share a bit more about the actual behavior vs. the expectation? Maybe some screenshots of using the GraphiQL IDE, etc?

[josephfusco]

Hey @tuanfront-end we were able to reproduce this. Here are the steps taken so far:

• Setup fresh WordPress install w/ an admin user and author.
• As an author, created a post using WordPress admin, and confirmed that an author can save a draft or published post with a post format assigned.
• Ran the following mutation

mutation MyMutation {
  createPost(
    input: {title: "This is title", postFormats: {append: false, nodes: {name: "video"}}}
  ) {
    post {
      title
      id
      postFormats {
        nodes {
          id
          name
          slug
        }
      }
    }
  }
}

• observed that the post format was not assigned, confirming that WPGraphQL is NOT behaving the same in WordPress admin

---

Notes: possibly related, the capability check towards the bottom of PostObjectMutation.php

[tuanfront-end]

@jasonbahl @josephfusco sorry for the late reply and thanks for your great work, hope the problem will be resolved soon 💪