CODEWITHSUNDEEP
ruby-on-railshas-manyeager-loading
whitehat
whitehat

Reputation: 2391

How to specify eager loading of associations in rails model

class A < ActiveRecord::Base
  has_many :Bs
  has_many :Cs
  ...
end

I wish to load all of B's and C's whenever I do a query on A, say A.where(name: :abc), with a single query, instead of multiple calls to database.

I don't wish to specify .includes for every query I run. How do I specify eager loading in the model itself?

I looked many similar question and tried do this but it does not work:

default_scope :include => [:Bs, :Cs]

Upvotes: 0

Views: 385

Answers (1)

nbermudezs
nbermudezs

Reputation: 2844

default_scope { includes(:Bs, :Cs) } should do it.

As far as I know the scope takes a block as argument not a hash of options. I just tried it in the rails console and seems to work.

Upvotes: 5

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