Monkey patching a gem (rails_admin, with Rails 3)

rubyonrails-talk
1

Hi.

I’m trying to monkey patch the rails_admin gem.

First, I tried to add a file in config/initializers containing:

RailsAdmin::MainController.class_eval do

def get_sort_hash

CODE HERE…

end

end

It was only loaded once, and then the method from the gem was always executed instead of mine.

I also tried to add the code in lib/ with the correct line in config/application.rb to load all files in lib/. But in this case it does not work at all.

Each time I defined my method using the following blocks:

RailsAdmin::MainController.class_eval do end

::RailsAdmin::MainController.class_eval do end

Any idea? Thanks.

2

Hi.

I'm trying to monkey patch the rails_admin gem.

Not entirely answering the question, but why not just fork it on github? Bundler makes it super easy to install gems from your own git repo

Fred

3

You’re probably right, but I would not lose rails_admin features.

But as nobody answered my problem on the plugin’s mailing list I think I’m gonna try other backend tools.

4

Hi.

I’m trying to monkey patch the rails_admin gem.

First, I tried to add a file in config/initializers containing:

RailsAdmin::MainController.class_eval do

def get_sort_hash

CODE HERE…

end

end

It was only loaded once, and then the method from the gem was always executed instead of mine.

I also tried to add the code in lib/ with the correct line in config/application.rb to load all files in lib/. But in this case it does not work at all.

Each time I defined my method using the following blocks:

RailsAdmin::MainController.class_eval do end

::RailsAdmin::MainController.class_eval do end

Any idea? Thanks.

What are you trying to do exactly?

-Conrad

5

I want to be able to sort a view of a model that has nested belongs to:

Checkin belongs to a Program that belongs to a User

So I want to sort the checkins according to the linked users.

6

OMG I feel ashame, I discovered that what I want to do at the relationship level can be done with a has_one :through… Never thought of using this!

BTW I modified the admin_data plugin to tweak the sorting order and add scopes, could be useful for other nested associations.