[Request] GET collections of an item [API]

[lcandy2]

Currently there is no API endpoint to fetch all collections that include a given item.
For example, given an item_uuid, it would be useful to retrieve a list of collections that contain this item.

Suggested Endpoint

GET /api/item/{item_uuid}/collections/

Expected Response Example

[
  {
    "uuid": "collection-uuid",
    "name": "My Favorites",
    "owner": {
      "id": "user-id",
      "username": "citron"
    }
  },
  ...
]

Use Case

• Display which collections an item belongs to on its detail page
• Support showing “Added to your collections” states for logged-in users

[mohammadrafigh]

As a workaround I currently fetch collections using /posts API to get collection ids from relatedWith list, and then re-request to get collection info such as image, using /collection API. In large scale this could make tons of requests so I limit item collections to 10 to prevent too much load on instances.
Having an item collections API can help a lot.