How to update an array of uuids?

[joshuarobs]

e.g. something like this doesn't work:

mutation updateAuthors {
  update_items(where: {id: {_eq: "5210fb1e-db61-412f-bc20-e3b701c05068"}}, _set: {post_ids: "{87eadf2f-85fd-4667-968c-10d20dfdceff, 6dc8db0b-0cb8-486c-9492-24adb1430149}"}) {
    returning {
      id
      name
      post_ids {
        id
        name
      }
    }
  }
}

I get this error:

{
  "errors": [
    {
      "extensions": {
        "path": "$",
        "code": "data-exception"
      },
      "message": "invalid input syntax for type uuid: \"{87eadf2f-85fd-4667-968c-10d20dfdceff, 6dc8db0b-0cb8-486c-9492-24adb1430149}\""
    }
  ]
}

Square brackets don't seem to work either:

{
  "errors": [
    {
      "extensions": {
        "path": "$",
        "code": "data-exception"
      },
      "message": "invalid input syntax for type uuid: \"[87eadf2f-85fd-4667-968c-10d20dfdceff, 6dc8db0b-0cb8-486c-9492-24adb1430149]\""
    }
  ]
}

I'm looking to set an empty array of uuids to an array of 2 existing uuids. How can you do this in Hasura? I tried removing the {} and the " " from the code in the _set: .... part of the query, but they don't work. I don't seem to be able to get this to work with a uuid. Also I'm sure I have an array relationship set, as I can successfully query an author, if it has one post id in it.

[joshuarobs]

Realised I did it all wrong and that I had to follow instructions from here to properly setup many to many relationships: https://docs.hasura.io/1.0/graphql/manual/schema/relationships/database-modelling/many-to-many.html