A belated thanks Jon - dm-constraints has proved to be very useful.

cheers,

DAZ

On Oct 18, 10:49 pm, Jonathan Stott <[email protected]> wrote:
> On 18 October 2010 20:52, DAZ <[email protected]> wrote:
>
> > Hi Jon,
>
> > Thanks for the reply and sorry for taking so long to get back to you.
>
> > It turns out that I was inadvertently using dm-constraints as I was
> > using require 'data_mapper'
> > The default value is 'protect' so it was refusing to delete my lists.
> > I've not changed this to :destroy and it works fine.
>
> > I just have a couple of questions:
> > 1) Do you have to use dm-constraints when using associations?
>
> You don't have to use it, but it's generally advisable.  As well as
> setting things up in DM land, it also adds database level constraints
> to make sure you can't have orphaned records (one way or another).
> This helps to keep your application's data consistent. Think of them
> as being akin to validations for associations, ensuring your foreign
> (or child) key always points to a valid record.
>
> > 2) Is there any way of getting DM to report the reason why it hasn't
> > deleted the list in the console so it is easier to figure out why it
> > isn't doing something in future?
>
> Unfortunately not.
>
>
>
> > cheers,
>
> > DAZ
>
> regards
> Jon

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