save an active records array

Question

I have an array like this

a = []

a << B.new(:name => "c")
a << B.new(:name => "s")
a << B.new(:name => "e")
a << B.new(:name => "t")

How i can save it at once?

Answer 1

a.each(&:save)

This will call B#save on each item in the array.

Answer 2

B.transaction do
  a.each(&:save)
end

This will create a transaction that loops through each element of the array and calls element.save on it.

You can read about ActiveRecord Transactions and the each method in the Rails and Ruby APIs.