How to update all when you need callbacks fired?

ruby-on-rails ruby-on-rails-3 activerecord callback update-all
Andrew picture Andrew · Aug 3, 2011 · Viewed 32.3k times · Source

Let's say I've got 15 user ids in an array called user_ids.

If I want to, say, change all of their names to "Bob" I could do:

users = User.find(user_ids)
users.update_all( :name => 'Bob' )

This doesn't trigger callbacks, though. If I need to trigger callbacks on these records saving, to my knowledge the only way is to use:

users = User.find(user_ids)
users.each do |u|
  u.name = 'Bob'
  u.save
end

This potentially means a very long running task in a controller action, however.

So, my question is, is there any other better / higher performance / railsier way to trigger a batch update to a set of records that does trigger the callbacks on the records?

Answer

untitled picture untitled · Jul 12, 2017

Instead of using each/find_each, try using update method instead:

models.update(column: value)

Which is just a wrapper for the following:

models.each{|x| x.update(column: value)}

Related questions

Check if record exists from controller in Rails

In my app a User can create a Business. When they trigger the index action in my BusinessesController I want to check if a Business is related to the current_user.id: If yes: display the business. If no: redirect …

Read More
Can you do greater than comparison on a date in a Rails 3 search?

I have this search in Rails 3: Note.where(:user_id => current_user.id, :notetype => p[:note_type], :date => p[:date]).order('date ASC, created_at ASC') But I need the :date => p[:date] condition to be …

Read More
How to chain scope queries with OR instead of AND?

I'm using Rails3, ActiveRecord Just wondering how can I chain the scopes with OR statements rather than AND. e.g. Person.where(:name => "John").where(:lastname => "Smith") That normally returns: name = 'John' AND lastname = 'Smith' but I'd like: `…

Read More