Exception: DataMapper::UnsavedParentError

PersistenceError show all
Defined in:


Raised on attempt to operate on collection of child objects when parent object is not yet saved. For instance, if your article object is not saved, but you try to fetch or scope down comments (1:n case), or publications (n:m case), operation cannot be completed because parent object's keys are not yet persisted, and thus there is no FK value to use in the query.