# /api/v3/relations
---
get:
  parameters:
  - description: |-
      JSON specifying filter conditions.
      Accepts the same format as returned by the [queries](https://www.openproject.org/docs/api/endpoints/queries/) endpoint. Valid fields to filter by are:

      + id - ID of relation

      + from - ID of work package from which the filtered relations emanates.

      + to - ID of work package to which this related points.

      + involved - ID of either the `from` or the `to` work package.

      + type - The type of relation to filter by, e.g. "follows".
    example: '[{ "from": { "operator": "=", "values": 42 }" }]'
    in: query
    name: filters
    required: false
    schema:
      type: string
  - description: |-
      JSON specifying sort criteria.
      Accepts the same format as returned by the [queries](https://www.openproject.org/docs/api/endpoints/queries/) endpoint.
    example: '[["type", "asc"]]'
    in: query
    name: sortBy
    required: false
    schema:
      type: string
  responses:
    '200':
      content:
        application/hal+json:
          examples:
            response:
              value:
                _embedded:
                  elements:
                  - _links:
                      delete:
                        href: "/api/v3/relations/1"
                        method: DELETE
                      from:
                        href: "/api/v3/work_packages/42"
                        title: Steel Delivery
                      self:
                        href: "/api/v3/relations/1"
                      to:
                        href: "/api/v3/work_packages/84"
                        title: Bending the steel
                      update:
                        href: "/api/v3/relations/1/form"
                        method: POST
                      updateImmediately:
                        href: "/api/v3/relations/1"
                        method: PATCH
                    _type: Relation
                    delay: 0
                    description: We can't bend the steel before it's been delivered!
                    id: 1
                    name: precedes
                    reverseType: follows
                    type: precedes
                _links:
                  self:
                    href: "/api/v3/relations"
                _type: Collection
                count: 1
                total: 3
          schema:
            "$ref": "../components/schemas/relations_model.yml"
      description: OK
      headers: {}
  tags:
  - Relations
  description: |-
    Lists all relations according to the given (optional, logically conjunctive) filters and ordered by ID.
    The response only includes relations between work packages which the user is allowed to see.
  operationId: List_Relations
  summary: List Relations