How to access model in environment configuration?

Question

I have a multi-tenant application where each tenants information is stores in the database.

I have some variables in the environment configs (development.rb, production.rb) which I want to populate with data from the DB.

Trying to call the model doesn't seem to work.

Is there a way to call a model in the application initializer?

Edit:

Here is the code:

# production.rb
Rails.application.configure do {
  config.custom_variable = MyModel.myattribute
}

This returns a ActiveRecord::ConnectionNotEstablished error

@SergioTulentsev Trying to access a model gives a `undefined local variable or method` error — user3188544, Aug 11 '15 at 07:03
What if you called `ActiveRecord::Base.establish_connection!` there? — Sergio Tulentsev, Aug 11 '15 at 07:16
`method_missing': undefined method 'establish_connection!' for ActiveRecord::Base:Class (NoMethodError)` — user3188544, Aug 11 '15 at 07:17
http://apidock.com/rails/ActiveRecord/Base/establish_connection/class — Sergio Tulentsev, Aug 11 '15 at 07:31
Remember that your database connection settings are also part of the environment configuration. So you want to read from the db when its connections have not been setup yet. It might be better to read the configuration from text files. — zwippie, Aug 11 '15 at 07:48
refer this [link](https://stackoverflow.com/questions/22680047/how-to-call-app-model-in-initializers-with-ruby-on-rails*emphasized text*) — Syed Shahid, Aug 07 '18 at 20:02

score 1 · Answer 1 · answered Aug 11 '15 at 08:41

1

Initializers run before ActiveRecord is loaded, so you'll need to wait for ActiveRecord before accessing it.

Wrapping your code in an ActiveSupport#on_load block should work.

# production.rb
Rails.application.configure do {
  ActiveSupport.on_load(:active_record) do
     config.custom_variable = MyModel.myattribute
  end
}

answered Aug 11 '15 at 08:41

fylooi

I get a `undefined local variable or method 'config' for ActiveRecord::Base:Class (NameError)` – user3188544 Aug 11 '15 at 14:56
Try `.configure do |config|` and take out the curly braces. That was based on your earlier code. – fylooi Aug 12 '15 at 06:53

1 Answers1