Thank you so much for all your help!
On Mar 5, 2:44 pm, Michael Pavling <pavl...@gmail.com> wrote:
> On 5 March 2010 17:02, xxdesmus <xxdes...@gmail.com> wrote:
>
> > So I have a bunch of form fields that I need to add up their
> > values, and make sure their sum does not except the value entered in a
> > new form field. If the sum does exceed the form field value then I
> > want to alert the user and prevent it from saving. Basically I want to
> > validate that :atWorkHours.value > ( :hoursMeetings.value
> > + :hoursTraining.value + :hoursProjTrav.value )
>
> > I tried to do something similar to this in my model...but I assume I
> > just had the syntax completely wrong.
>
> Assuming all of the "hours" attributes all return numbers (something,
> somewhere is ensuring that, I hope ;-) -- you can add some
> validations to your model. Again, there's a couple of ways of doing
> this - I normally separate the method that adds the error to base from
> the code that checks the condition (so I can check the condition
> myself if I want), but you could easily merge them together if you
> prefer:
>
> validate :validate_work_hours_not_exceeded
>
> def work_hours_exceeded?
> # this is a little different to your equation, as yours would
> raise an error if both sides were exactly the same, and I'd guess
> that's not the right result - but if not, adjust it to suit
> [hours_at_meetings, hours_in_training, hours_travelling].sum >
> hours_at_work
> end
>
> private
> def validate_work_hours_not_exceeded
> errors.add_to_base("Do not exceed working hours") if work_hours_exceeded?
> end
>
> I took the liberty of tweaking the variable names (although you were
> showing them as symbols...) to make them a little more in line with
> conventions (and, I think, more easily readable - YMMV :-)
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