# Group Posts

Represents a post in a board. Posts are also referred to as messages in the application.

*This resource is currently a stub*

## Actions

| Link                | Description                    | Condition                                                                                                                        |
|:-------------------:|--------------------------------| ---------------------------------------                                                                                          |
| addAttachment       | Attach a file to the post      | **Permission**: edit messages           |

## Linked Properties

| Property         | Description                                            | Type        | Constraints    | Supported operations |
| :--------------: | ------------------------------------------------------ | ----------- | -------------- | -------------------- |
| self             | This post                                              | Post        | not null       | READ                 |
| attachments      | The files attached to this post                        | Collection  |                | READ                 |
| project          | The project the post belongs to                        | Project     | not null       | READ                 |

## Local Properties

| Property         | Description                                 | Type                  | Constraints                          | Supported operations |
| :--------------: | ------------------------------------------- | -----------           | ------------------------------------ | -------------------- |
| id               | Identifier of this post                     | Integer               | x > 0                                | READ                 |
| subject          | The posts's subject                         | String                | not null                             | READ                 |

## Post [/api/v3/posts/{id}]

+ Model
    + Body

            {
                "_type": "Post",
                "id": 1,
                "subject": "A post with a subject",
                "_embedded": {
                    "project": {
                        "_type": "Project",
                        "id": 1,
                        <-- abbreviated -->
                        }
                    }
                },
                "_links": {
                    "self": {
                        "href": "/api/v3/posts/1"
                    },
                    "attachments": {
                        "href": "/api/v3/posts/1/attachments"
                    },
                    "addAttachment": {
                        "href": "/api/v3/posts/1/attachments",
                        "method": "post"
                    },
                    "project": {
                        "href": "/api/v3/projects/1",
                        "title": "A project with a title"
                    }
                }
            }

## View Post [GET]

Retrieve an individual post as identified by the id parameter

+ Parameters
    + id (required, integer, `1`) ... Post's identifier

+ Response 200 (application/hal+json)

    [Post][]

+ Response 404 (application/hal+json)

    Returned if the post does not exist or the client does not have sufficient permissions to see it.

    **Required permission:** view messages in the post's project

    + Body

            {
                "_type": "Error",
                "errorIdentifier": "urn:openproject-org:api:v3:errors:NotFound",
                "message": "The requested resource could not be found."
            }