I have been trying to figure out the best way to pass an array back and forth between a hidden field in a form and a controller. I am working on an app that the user can add group members to and decided the best and most user friendly is to show the user a text field to input the name of the member. This field has auto complete on it. When they submit the member is added to an array in the controller until the whole form is complete (it is possible for 10,000 members to be available and having a multiselect box is not pretty that big). The adding of members to the group happens at group creation. Currently I am converting the array to a string seperated by commas and than taking that string once submitted and parsing it into an array. It works however I am not happy with the solution as it seems like extra work that doesn''t need to be done. Is it possible to put an array in a hidden field, I have tried and failed but could be doing something wrong? Or is there another way to do what I am trying to do that is easier and better than what I am doing now? Thanks Andrew