So I am building a backend using Ash where Users (using Ash Authentication) can create and be members of a project and each project can have more than one member.
On project resource:
relationships do
has_many :project_members, ProjectHero.Projects.ProjectMember do
destination_attribute :project_id
end
many_to_many :members, ProjectHero.Accounts.User do
through ProjectHero.Projects.ProjectMember
source_attribute_on_join_resource :project_id
destination_attribute_on_join_resource :user_id
end
end
And on project_member resource:
relationships do
belongs_to :project, ProjectHero.Projects.Project, primary_key?: true, allow_nil?: false
belongs_to :user, ProjectHero.Accounts.User, primary_key?: true, allow_nil?: false
end
On my create action for projects I do this:
create :create do
accept [:name]
argument :user_id, :uuid do
allow_nil? false
end
change manage_relationship(:user_id, :members, type: :append_and_remove)
end
And it works creating the project_member. However, it means I manually have to provide the user_id even if that already exits in he actor.
I tried this:
change fn changeset, context ->
change manage_relationship(context.actor.id, :members, type: :append_and_remove)
end
But that does not work. Is there anyway to do related actor but for a many-to-many relationship on a join table?
