类设备has_many :equipment_maintenances
和accepts_nested_attributes_for : equipment_maintenances, allow_destroy: true
类设备维护has_many :equipment_maintenanceitems
和accepts_nested_attributes_for : equipment_maintenanceitems, allow_destroy: true
以下表单可以正确生成HTML以更新孙子(即name="equipment[equipment_maintenance_attributes][0][equipment_maintenanceitems_attributes][1][active]"
,如下所示:
<%= form_for @equipments do |equipment| %>
<% @equipment_maintenances.each do |equipment_maintenance| %>
<%= equipment.fields_for :equipment_maintenance do |em| %>
<%= em.fields_for :equipment_maintenanceitems do |f| %>
<%= f.check_box :active %>
<%= f.text_field :order %>
<%# equipment_maintenanceitem.name %>
<%= f.select :frequenc, [3,4,6,12] %>
<% end %>
<% end %>
<% end %>
<%= equipment.submit %>
<% end %>
但是,我没有找到适当的语法来引用孙equipment_maintenanceitem.name
更新在原始问题得到妥善回答的同时,问题未得到充分说明。 EquipmentMaintenanceItem belongs_to :ordinary_maintenanceitem
,目标是获得equipment_maintenanceitem.ordinary_maintenanceitem.name
答案 0 :(得分:0)
<%= form_for @equipments do |equipment| %>
<% @equipment_maintenances.each do |equipment_maintenance| %>
<%= equipment.fields_for :equipment_maintenance do |em| %>
<%= em.fields_for :equipment_maintenanceitems do |f| %>
<%= f.check_box :active %>
<%= f.text_field :order %>
<%= f.label :name %>
<%= f.select :frequenc, [3,4,6,12] %>
<% end %>
<% end %>
<% end %>
<%= equipment.submit %>
<% end %>
一种简单的方法是使用label来显示equipment_maintenanceitems的名称
答案 1 :(得分:0)
根据问题的原始表述,答案是:
<%= f.object.name %>
在更新的背景下,答案是:
<%= OrdinaryMaintenanceItem('id = ?',f.object.maintenanceitem_id).pluck("name") %>
效率不高,需要清理数组和字符串符号...