Ar Chron wrote:
> Pito Salas wrote:
>> Here's an example:
>> 
>> class LineItem < ActiveRecord::Base
>>   belongs_to :order
>> end
>> 
>> class Order < ActiveRecord::Base
>>   has_many :line_items
>> end
>> 
>> my_line_item = LineItem.find(:zipcode => "12345")
>> 
>> Order.find_by_line_item(my_line_item) # doesn't work
>> 
>> Order.find_by_line_item_id (my_line_item) # does work
>> 
> 
> Probably not explaining this clearly enough (I blame the distillery 
> masters at Lagavulin), but:

Wish I was there! Which of their Beer is available in the US?

> 
> find_by_line_item fails - my_line_item is an instance of the class (an 
> object) that does not have a 'line_item' attribute you indicated, it 
> *is* a LineItem

It kind of does, in that Order has_many :line_items, no? And so that's 
an ActiveRecord method on Order called line_items?

By the way, my_order.find_by_line_item fails with "no such method", not 
just by returning [].

I wonder if my_order.find_by_line_items would work?

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