Rails - Oct 2013 - copy rails association in 2.3 with clone method

I have a Reminder model, Attachment Model and it has habtm relationship
with each other.

So I have a created another table as attachment_reminders table in mysql
through migrations and it has reminder_id and attachment_id fields.

In controller I need to copy a record in attachment table and save it in
Attachment table. I am able to do that..

But I need to add the same in the attachment_reminders table also.  How
can I achieve it. Please find my code below

    def view_reminder
        @reminder = Reminder.find(params[:id2])
        @attachments = @reminder.attachments
           if request.post?
            
Reminder.create(:sender=>@reminder.user_id,:recipient=>params[:recipient],:body=>params[:body])
             @attachments.each do |at|
             rec = at.clone
             rec.created_at = Time.now
             rec.updated_at = Time.now
             rec.save
          end
        flash[:notice]="Reminder updated successfully"
        redirect_to :controller=>"reminde",
:action=>"view_reminder",
:id2=>params[:id2]
      end

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On Oct 11, 2013, at 3:17 AM, ruby rails wrote:
> I have a Reminder model, Attachment Model and it has habtm relationship
> with each other.
> 
> So I have a created another table as attachment_reminders table in mysql
Is this a copy-paste error? s/b attachments_reminders (both plural), right?
> through migrations and it has reminder_id and attachment_id fields.
> 
> In controller I need to copy a record in attachment table and save it in
> Attachment table. I am able to do that..
> 
> But I need to add the same in the attachment_reminders table also.  How
You should never worry about the attachments_reminders table directly at all. If
you add attachments to the @reminder.attachments collection, when you save the
@reminder, the attachments will be "attached" automagically. The
inverse is also true. You can create new attachments on the reminder by calling
@reminder.attachments.build( any arguments here ).
> can I achieve it. Please find my code below
> 
>    def view_reminder
>        @reminder = Reminder.find(params[:id2])
>        @attachments = @reminder.attachments
>           if request.post?
>            
Reminder.create(:sender=>@reminder.user_id,:recipient=>params[:recipient],:body=>params[:body])
>             @attachments.each do |at|
>             rec = at.clone
>             rec.created_at = Time.now
>             rec.updated_at = Time.now
Nothing in this loop is needed. If you have properly defined your habtm
relationship (including correctly-named table) then nothing about this has to be
declared like this. You don''t need to test for post?, you
don''t need to do anything besides create or update the main object in
your controller, just as if it didn''t have any attachments. When you
save the main object, all of its related objects are created, updated, saved --
whatever they need.
>             rec.save
>          end
>        flash[:notice]="Reminder updated successfully"
>        redirect_to :controller=>"reminde",
:action=>"view_reminder",
> :id2=>params[:id2]
>      end
> 
Walter

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