Ruby on Rails

On 9 October 2013 09:05, gamov <gama...@gmail.com> wrote:
> I also don't understand what they mean since the example seems to contradict
> it...

Exactly which bit of
http://guides.rubyonrails.org/association_basics.html#bi-directional-associations
seems to be a contradiction?  Unless you explain /exactly/ what you do
not understand it is difficult to help.

Colin

>
>
> On Tuesday, November 13, 2012 5:24:16 PM UTC+8, Paul Leader wrote:
>>
>> It is useful in a small number of situations, mostly where you need to
>> ensure that two different references to the same object actually refer to
>> the same instance.  I've only needed to use it twice, both times were where
>> we have callbacks updating multiple related objects based on data held in
>> each other.
>>
>> Anyway, if anyone else does understand what that caveat actually means I'd
>> appreciate an explanation.
>>
>> On Tuesday, November 13, 2012 4:17:22 AM UTC, Greg Donald wrote:
>>>
>>> On Mon, Nov 12, 2012 at 4:09 AM, Paul Leader <pa...@paulleader.co.uk>
>>> wrote:
>>> > Perhaps I'm bing a bit thick and missing something obvious (possible),
>>> > but I
>>> > found the caveats listed in section 3.5 of the Associations Rails Guide
>>> > badly worded and confusing.
>>> >
>>> > The section gives an example with a has_many <-> belongs_to
>>> > relationship is
>>> > setup with inverse associations on both side, but then states the
>>> > caveat
>>> > "For belongs_to associations, has_many inverse associations are
>>> > ignored."
>>> >
>>> > Could someone actually explain what that means in concrete terms? The
>>> > example and the caveat appear to be contradictory. If the caveat is
>>> > correct
>>> > then I'm not sure I understand how the example works.
>>>
>>> I've never needed :inverse_of.  Looks like academic masturbation to me.
>>>
>>>
>>> --
>>> Greg Donald
>
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