Does anyone have a workaround for mutations that both add and update an array of objects, per https://www.graph.cool/forum/t/how-do-i-add-an-array-of-objects-to-a-mutation-in-apollo-react/365/6 ?

Combined

You can also use tags and tagsIds in the same mutation, this would connect the new Tutorial node to all the tags in tagsIds and connect it to the new tags in tags. This is what you want to do if you want to only allow tags with a unique text, so for a new Tutorial, there will likely be some tags that already exists, and some that need to be created.

In my case, I am trying to update a set of tags on a Post. I am able to pass both

tags

(new tags) and

tagsIds

(ids of tags that already exist) to my mutation:

const updatePostQuery = ({
  id,
  createdById,
  timestamp,
  imageUrl,
  description,
  tags,
  tagsIds,
}) => ({
  mutation: gql`
    mutation updatePost(
      $id: ID!
      $createdById: ID!
      $timestamp: DateTime!
      $imageUrl: String
      $description: String
      $tags: [PosttagsTag!]!
      $tagsIds: [ID!]
    ) {
      updatePost(
        id: $id
        createdById: $createdById
        timestamp: $timestamp
        imageUrl: $imageUrl
        description: $description
        tags: $tags
        tagsIds: $tagsIds
      ) {
        id
        timestamp
        description
        tags {
          id
          tag
        }
        imageUrl
        createdBy {
          id
          username
        }
      }
    }
  `,
  variables: {
    id,
    createdById,
    timestamp,
    imageUrl,
    description,
    tags,
    tagsIds,
  },
});

However, I get the following error:

ERROR:  [Error: GraphQL error: A unique constraint would be violated on Post. Details: Sorry, no more details available.]

While the new tag is added successfully the mutation seems to be trying to append the ids of the existing tags to the field instead of updating their values?