Tuesday, July 24, 2018
Hello all,
I'm currently working on upgrading our application to Rails 4.1 and am running into the following scenario.
We have an existing model named `Transaction` which conflicts with the ActiveRecord instance method of the same name when we refer to this model in a `belongs_to` association like this:
```
class Transaction < ActiveRecord::Base
end
class Thing < ActiveRecord::Base
belongs_to :transaction
end
```
This will trigger this error: "You tried to define an association named transaction on the model Thing, but this will conflict with a method transaction already defined by Active Record. Please choose a different association name."
As far as I can tell, the `transaction` instance method has existed in ActiveRecord since Rails 3.x but this error was added in 4.1.0.rc1 as shown here: https://github.com/rails/rails/pull/13896
My question is twofold:
1) Is there a convenient way to rename an association like this without having to change the model name, db table name, etc?
2) Why is `ActiveRecord::Base#transaction` available as an instance method in the first place? Seems like this is best implemented as a class method and in fact the instance method version in ActiveRecord just calls the class method version anyway (see here: https://github.com/rails/rails/blob/master/activerecord/lib/active_record/transactions.rb#L299-L302).
The word "Transaction" seems as though it would be a commonly used model name for many Rails applications so I'm just trying to gain an understanding of why this would be taken by ActiveRecord.
Thanks,
Jason
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