Posting relation with id create new entry in database

Questions and Answers
1
System Information
  • Strapi Version: 3.6.8:
  • Database: Sqlite:

I am using component to build my relation like this:

{
  "kind": "collectionType",
  "collectionName": "books",
  "info": {
    "name": "Books",
    "description": ""
  },
  "options": {
    "increments": true,
    "timestamps": true,
    "draftAndPublish": true
  },
  "pluginOptions": {},
  "attributes": {
    "booktitle": {
      "type": "string"
    },
    "authors": {
      "type": "component",
      "repeatable": true,
      "component": "books.authors"
    }
  }
}

The problem is when I am creating a new book, even when I add the ID of author like below, it doesn’t care, and will create a new author with new ID, but if I send a put request with the same JSON structure it notice the ID and will not create a new author record! Why it is not working in post request? Am I missing something?

JSON data, which I use for POST and PUT request:

{"booksubtitle":"test","authors":[{"id":4,"author":"test author"},{"id":5,"author":"1"},{"id":6,"author":"2"}]}

The POST response:

{
    "id": 5,
    "booktitle": "test",
    "authors": [
        {
            "id": 13,
            "author": "test author"
        },
        {
            "id": 14,
            "author": "1"
        },
        {
            "id": 15,
            "author": "2"
        }
    ]
}

The PUT response:

{
    "id": 2,
    "booktitle": "test",
    "authors": [
        {
            "id": 4,
            "author": "test author"
        },
        {
            "id": 5,
            "author": "1"
        },
        {
            "id": 6,
            "author": "2"
        }
    ]
}
2

Small question, why are you using components for this instead of just a manyWay relation. I feel like this would cause a lot of complexity and duplication of data.

3

Because in the Strapi admin UI it is easier for the user, but it seems the use case of component are very limited.

4

You may put like this, it worked totally perfect with me:

{"booksubtitle":"test","authors":[4,5,6]}

The point is: you can not create new items regarding your relation, you can only refer to them with their ids.