Resolving Class Name Conflicts in a Rails Application

Question

I am creating a Rails application that performs accounting functions. As part of this, I have a model with the Transaction class name. So far so good, I have been creating this functionality for a month or so, and everything works as expected.

Still...

I just discovered some old reporting features that were developed a few months ago when the Ruport library stopped working. It seems that Ruport when creating PDF files requires a library that also has a class / module called Transaction .

 TypeError in Admin/team reportsController#generate Transaction is not a module ... This error occurred while loading the following files: pdf/writer transaction/simple 

So, I am looking for a quick solution. One of them, which, I hope, does not involve renaming my Transaction model and refactoring code in the last few weeks.

Looking forward to some smart suggestions :)

Answer 1

I believe the problem is with Ruport, which requires creating a PDF :: Writer file, which in turn requires Transaction :: Simple gem, which defines the Transaction module.

ActiveRecord has a #transaction method, but I don't think Rails has a Transaction module or class. I will be glad if he corrects you.

Moving names is usually best practice to avoid name conflicts this way. For example.

 module Account class Transaction < ActiveRecord::Base .... end end 

However, modeling named ActiveRecord instances can cause other problems.

Like a lot of time, renaming your transaction model may be the best choice.

You can still save the existing transaction transaction table if you want, so your migrations do not need to be changed by placing self.table_name = "transactions" inside your model.

Your associations with other models may also still be called "transaction (s)" by specifying the class name in the association call. For example.

 class User < ActiveRecord::Base has_many :transactions, :class_name => "AccountTransaction" end 

These two suggestions may or may not save you some time.

Answer 2

The old one already answered, but I came here with the same problem, but I solved it differently.

I have two models named Pull and Query. Attempting to reference Query.some_static_method() in a method in Pull led to resolving the query to ActiveRecord::AttributeMethods::Query:Module .

Solved it by putting an empty namespace in front of it ::Query.some_static_method()

Answer 3

Your problem may arise because Transaction is also a reserved word in Rails ...