Question

Page.rb

has_many :comments, :dependent => :restrict

This validation raises

PagesController# (ActiveRecord::DeleteRestrictionError) "Cannot delete record because of `dependent comments"`

Is there a way to show it like a flash message or with other validation messages.?

Answer 1

Use begin/rescue to catch that exception and then add the error message to the base errors for page… my syntax is off, but something like…

begin
  @page.destroy
rescue ActiveRecord::DeleteRestrictionError => e
  @page.errors.add(:base, e)
end