edit model using selectbox nested_form gem

问题

I have a nested form gem issue and can't figure it out for days.

When "edit" model, why my selectbox not filled with current value from database?

my "customize" view :

<%= nested_form_for @order_detail, :url => create_customize_cart_path do |f| %>
    # some field here
    <%= f.fields_for :order_customs do |builder| %>
      <%= render "order_customs_form", :f => builder %>
    <% end %>
    <%= f.link_to_add "Add Order Customize", :order_customs %>
    <%= f.submit %>  
<%end%>

my partial view (as nested) :

<%= f.label :pressed_position, "Position" %>
<%= f.select :pressed_position, options_for_select(PRESSED_POSITION), {:include_blank => '-- Select Position --'} %>
<%= f.link_to_remove "Remove Customize" %>

PRESSED POSITION as CONSTANT and data store "string" value

PRESSED_POSITION = [
  ["Top", "top"],
  ["Center","center"],
  ["Bottom","bottom"],
  ["Right", "right"],
  ["Left", "left"],
  ["Top Left", "top left"],
  ["Top Center", "top center"],
  ["Top Right", "top right"],
  ["Center Left", "center left"],
  ["Center Center", "center center"],
  ["Center Right", "center right"],
  ["Bottom Left", "bottom left"],
  ["Bottom Center", "bottom center"],
  ["Bottom Right", "bottom right"]
]

For textfield it works (filled with current data), but if i using selectbox it doesn't

in my controller :

def customize
  @order_detail = OrderDetail.find_by_id(decrypting_id(params[:id])) rescue nil
  if @order_detail.present?
    if (current_user == @order_detail.order.user || temporary_user == @order_detail.order.temp_user_id) && @order_detail.order.order_status_id == 1 
      1.times{@order_detail.order_customs}
    else
      # else going here
    end
  else
    # else going here
  end    
end

Can You guys tell me what should I do to solve this problem? Realy appreciate it, thank you

回答1:

I can't test it right now, but I would do it like this:

your view EDITED

<%= nested_form_for @order_detail, :url => create_customize_cart_path do |f| %>
    # some field here
  <% @order_detail.order_customs.each do |order_custom| %>
    <%= f.fields_for :order_customs, order_custom do |builder| %>
      <%= render "order_customs_form", :f => builder, :order_custom => order_custom %>
    <% end %> 
  <% end %>
  <%= f.link_to_add "Add Order Customize", :order_customs %>
  <%= f.submit %>  
<%end%>

We have to pass the order_custom object to the partial

The partial

<%= f.label :pressed_position, "Position" %>
<%= f.select :pressed_position, options_for_select(PRESSED_POSITION, PRESSED_POSITION.index{|element| element.last==order_custom.pressed_position), {:include_blank => '-- Select Position --'} %>
<%= f.link_to_remove "Remove Customize" %>

This line

PRESSED_POSITION.index{|element| element.last==order_custom.pressed_position)

will return the index of the PRESSED_POSITION array where the last element is equal to the pressed_position attribute of the object order_custom.

I hope it helps :)

来源：https://stackoverflow.com/questions/19242056/edit-model-using-selectbox-nested-form-gem

标签

ruby-on-rails

nested-forms

nested-attributes