I want to display each thumbnail image in a file_field of a dynamic form where rails can post multiple images.

<%@[email protected][i]%>← Count by one each time the add button is pressed

<div class="fieldwork_field">

  <div class="file">
      <%=f.file_field:work_image, accept: 'image/*'%>
      <%@gallery.works.find do | work | %>
        <%@[email protected][0]%>** I want this number to be 0 for the first form, 1 for the second form, and 2 for the third form.**
        <%[email protected][email protected]_image?%>** Preview here**

      <%end%>
      <%=f.hidden_field:work_image_cache%>
  </div><br>

      <%=f.text_field:work_title, class: 'text_field', placeholder: "Picture Title" %><br>

    <%=f.hidden_field: id%>

    <%=link_to_remove_field("Delete", f, {class:'remove_field'})%>
<script>
    $('input[type=file]').iPreview();
</script>

#coffeescript
$(document).on 'ready page:load', ->



  # When the Add button is pressed
  $('form') .on 'click', '.add_field', (event)->
    # Get current time in milliseconds
    time = new Date().getTime()
    # Replace helper-generated index values with ↑
    regexp = newRegExp($(this).data('id'), 'g')
    # Insert fields (HTML) passed from helper
    $(this).before($(this).data('fields').replace(regexp,time))
    event.preventDefault()

  # When the Delete button is pressed
  $('form') .on 'click', '.remove_field', (event)->



# Set the field to _destroy=true when you press the delete button.
$(this).prev('input[name*=_destroy]').val('true')
# hide a field with a delete button pressed
$(this).close('div').empty()
event.preventDefault()