If there is a parent, returns the relevant association proxy. Otherwise returns model.

Returns true/false based on whether or not a parent is present.

Returns the relevant association proxy of the parent. (i.e. /posts/1/comments # => @post.comments)

Like the model method, but for a parent relationship.

Returns the current parent object if a parent object is present.

Returns the current parent param, if there is a parent. (i.e. params[:post_id])

Returns true/false based on whether or not a parent is a singleton.

Returns the type of the current parent

Returns the type of the current parent extracted from params

Returns the type of the current parent extracted form a request path