@author Guy van den Berg @since 0.9
Add a validation error. Use the field_name :general if the errors does not apply to a specific field of the Resource.
@param <Symbol> field_name the name of the field that caused the error @param <String> message the message to add
Clear existing validation errors.
Collect all errors into a single list.
Return validation errors for a particular field_name.
@param <Symbol> field_name the name of the field you want an error for
[Validate]