Also, I'd guess that the categories.include? (id) is not what you want
since it's an actual list of category models and a literal reading of the
value passed would suggest it's comparing against hash { :id => 1 }, which
would be false. Perhaps category_ids.include? would be more to what you're
after.
On Friday, November 23, 2012 12:03:19 PM UTC-7, Bryan Larsen wrote:
>
> The if clause does conditional validation: the validation only runs
> when the if clause is true; when the if clause is false the validation
> isn't even checked. I don't think that's what you want.
>
> You're probably best off with validates_each:
>
>
> http://guides.rubyonrails.org/active_record_validations_callbacks.html#validates_each
>
>
> You can then put your conditions inside the block and it should work
> as you expect.
>
> Bryan
>
>
> On Thu, Nov 22, 2012 at 7:57 AM, tonym <[email protected] <javascript:>>
> wrote:
> > Hi all,
> >
> > not specifically a Hobo thing, but I can't find a resolution on other
> > forums...
> > I'm trying to validate that a field is not null, if a specific category
> has
> > been picked from the has_many association.
> > Model speaks for itself (this is simplified, not all my code)...
> >
> > fields do
> > food_range :text
> > timestamps
> > end
> >
> > has_many :categories, :through => :category_assignments, :accessible
> =>
> > true
> > has_many :category_assignments, :dependent => :destroy
> >
> > validates :food_style, :presence => true, :if =>
> > "self.categories.include?(:id => 1)"
> >
> > All I'm trying to do is check if :id => 1 is included in the list of
> > categories. This always returns false at the moment.
> >
> > Any ideas?
> >
> > Cheers, Anthony.
> >
> >
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