Calls Ash.Changeset.manage_relationship/4 with the changeset and relationship provided, using the value provided for the named argument

For example

change manage_relationship(:add_comments, :comments, on_missing: :ignore, on_match: :no_match, on_no_match: {:create, :add_comment_to_post}

Clears a change off of the changeset before the action runs.

Useful if a change is only used in validations but shouldn't ultimately be written to the data layer

Relates the actor to the data being changed, as the provided relationship.

Sets the attribute to the value provided. If a zero argument function is provided, it is called to determine the value.

Specs

set_context(map() | mfa()) :: {atom(), Keyword.t()}

Merges the given query context. If an MFA is provided, it will be called with the changeset.

The MFA should return {:ok, context_to_be_merged} or {:error, term}