Rails find_each不起作用

Question

Currently, I'm triggering a SuckerPunch Job via clockwork in my Rails app.

User.find_each do |user|
    puts "Found user: #{user.name}!"
end

# Doesn't work, too.
User.all.each do |user|
    puts "Found user: #{user.name}!"
end

However, the execution stucks when searching for the users. When printing the Enumerator ( User.find_each.inspect ) to the console it shows the users. Why won't the block run? May there be a Rails context missing?

It's been driving me crazy for hours. I'm deploying to Heroku, btw.

EDIT: I figured out, there's an error: Primary key not included in the custom select clause .

Thanks in advance!

Answer 1

I suspect you're hitting some sort of limit due to the number of Users in the db. Have you tried using find_in_batch instead?

http://apidock.com/rails/ActiveRecord/Batches/find_each (uses find_in_batch with a default batch_size of 1000) http://apidock.com/rails/ActiveRecord/Batches/find_in_batches (note the last post)