That's correct.
On Wed, Nov 12, 2008 at 12:46 PM, Glenn Little <[EMAIL PROTECTED]> wrote:
>
> Thanks, yes, that would do the trick. Can I assume that:
>
> def email=(address)
> self[:email] = address
> end
>
> is exactly synonymous with the normal accessors rails gives us?
> Particularly in regards to side effects and how it interacts with
> things like attr_accessible, mass-assignment via params, and so on?
>
> -glenn
>
> Jordan Fowler wrote:
>> Hi Glenn,
>>
>> 1. Your rationale is reasonable, considering you may want to work with
>> the new obj.email before saving
>> 2. Use the write_attribute or the []= synonym to set the actual field
>> value, example below:
>>
>> def email=(address)
>> self[:email] = address
>> if self.changed.member?("email")
>> self.email_last_sent = nil
>> end
>> end
>>
>> Hope this helps.
>>
>> -Jordan
>>
>> On Wed, Nov 12, 2008 at 12:21 PM, Glenn Little <[EMAIL PROTECTED]> wrote:
>>> I have a situation where I'd like a change to an AR object's
>>> attribute to conditionally cause another attribute change.
>>>
>>> For instance, class Person has attributes
>>>
>>> varchar name
>>> varchar email
>>> datetime email_last_sent
>>>
>>> If the person's email address changes, I want to zero-out the
>>> email_last_sent date.
>>>
>>> I can think of two places to do this: a before_save filter, or
>>> in the actual "email=" accessor. I'd prefer to use the
>>> accessor, since if I use before_save, my objects will be "incorrect"
>>> until I do a save()
>>>
>>> Two questions:
>>>
>>> 1) is my rationale regarding not wanting to use a before_save filter
>>> reasonable?
>>>
>>> 2) I can't figure out how to create a modified accessor that basically
>>> wraps the normal ActiveRecord-provided accessor. I want something
>>> like:
>>>
>>> def email=(address)
>>> ar_supplied_email= (address)
>>> if self.changed.member?("email") # or any other way of knowing if it
>>> changed
>>> self.email_last_sent = nil
>>> end
>>> end
>>>
>>> But how do I get at "ar_supplied_email="? I tried it with "self.email="
>>> but that not too surprisingly overflowed the stack :-)
>>>
>>> Thanks!
>>>
>>> -glenn
>>>
>>>
>>>
>>>
>>
>>
>>
>
> >
>
--
Jordan A. Fowler
2621 First Ave Apt 5
San Diego, CA 92103
E-mail: [EMAIL PROTECTED]
Website: http://www.jordanfowler.com
Phone: (619) 339-6752
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