Class: ActiveRecord::QueryCache

Inherits:
Object
  • Object
show all
Defined in:
activerecord/lib/active_record/query_cache.rb

Overview

Active Record Query Cache

Defined Under Namespace

Modules: ClassMethods

Instance Method Summary collapse

Constructor Details

#initialize(app) ⇒ QueryCache

Returns a new instance of QueryCache.



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# File 'activerecord/lib/active_record/query_cache.rb', line 27

def initialize(app)
  @app = app
end

Instance Method Details

#call(env) ⇒ Object 



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# File 'activerecord/lib/active_record/query_cache.rb', line 31

def call(env)
  enabled       = ActiveRecord::Base.connection.query_cache_enabled
  connection_id = ActiveRecord::Base.connection_id
  ActiveRecord::Base.connection.enable_query_cache!

  response = @app.call(env)
  response[2] = Rack::BodyProxy.new(response[2]) do
    restore_query_cache_settings(connection_id, enabled)
  end

  response
rescue Exception => e
  restore_query_cache_settings(connection_id, enabled)
  raise e
end