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Interacting with the GraphQL API
Interacting with the GraphQL APIExecuting bulk mutations

Executing bulk mutations

Gato GraphQL provides "bulk" mutation fields for all mutations in the schema, allowing us to mutate multiple resources.

For instance, mutation createPosts (single-resource mutation is createPost) will create multiple posts:

mutation CreatePosts {
  createPosts(inputs: [
    {
      title: "First post"
      contentAs: {
        html: "This is the content for the first post"
      }
    },
    {
      title: "Second post"
      contentAs: {
        html: "Here is another content, for another post"
      }
      excerpt: "The cup is within reach"
    },
    {
      title: "Third post"
      contentAs: {
        html: "This is yet another piece of content"
      },
      authorBy: {
        id: 1
      },
      status: draft
    }
  ]) {
    status
    errors {
      __typename
      ...on ErrorPayload {
        message
      }
    }
    post {
      id
      title
      content
      excerpt
      author {
        name
      }
      status
    }
  }
}

Arguments

All bulk mutations accept two arguments:

  • inputs (mandatory): The array of input items, where each item contains the data to mutate one resource
  • stopExecutingMutationItemsOnFirstError (default false): Indicate if, in case any of the inputs produces an error, should stop executing the mutation on the following inputs.

All mutations are executed in the same order provided in the inputs argument.

Use cases

Bulk mutations unlock possibilities for managing our WordPress site.

For instance, the following GraphQL query uses createPosts to duplicate posts:

query ExportPostData
{
  postsToDuplicate: posts {
    rawTitle
    rawContent
    rawExcerpt
    postInput: _echo(value: {
      title: $__rawTitle
      contentAs: {
        html: $__rawContent
      },
      excerpt: $__rawExcerpt
    })
      @export(as: "postInputs", type: LIST)
      @remove
  }
}
 
mutation CreatePosts
  @depends(on: "ExportPostData")
{
  createPosts(inputs: $postInputs) {
    status
    errors {
      __typename
      ...on ErrorPayload {
        message
      }
    }
    post {
      id
      title
      content
      excerpt
    }
  }
}