How to use nested_fields with auto increment number
imrasp opened this issue · comments
April commented
I would like to use nested_fields with auto increment number in a hidden field
currently, my code is
<%= f.nested_fields_for(:gate_directions) do |p| %>
<div class="row" style="margin-top:15px;">
<div class="col-sm-4">
<%= p.text_field :name, class: "form-control" %>
</div>
<div class="col-sm-3">
<%= p.hidden_field :idx %>
</div>
<div class="col-sm-1" style="margin-top: 5px;font-size: 18px;">
<%= p.remove_nested_fields_link '<i class="fa fa-trash"></i>'.html_safe%>
</div>
</div>
<% end %>
<%= f.add_nested_fields_link :products, "<i class='fa fa-plus'></i> product".html_safe%>
I want idx = 1 when first field created then 2 for the second one and so on. I have no idea to achieve this requirement, could you please give me some example or suggestion to implement this.
Nico Ritsche commented
Hi, you can use the Index replacement string for this:
<%= p.hidden_field "id__nested_field_for_replace_with_index__", value: "__nested_field_for_replace_with_index__" %>
It is also mentioned in the readme.