If you ever have to do multiple actions with activerecord, you should group it into a transaction like so:
Post.transaction do posts.each do |post| post = Post.new(:body=>'Whatever') post.save! end end
This will rollback too if the save fails.
Here is a cool way you can update columns in a table without writing any SQL using ActiveRecord. Suppose you have a form with checkboxes that are for deleting posts for the ones that are checked:
<input type="checkbox" name="posts[]" value="<%= post.id %>">
Now you can update this in the method of your controller that this form posts to:
Post.update_all({:removed=>true}, {:id=>params[:posts]})
ActiveRecord will take of the fact that you want to update 1 record or multiple!
