我已经设置了一个嵌套表单,并且可以将表单保存到我的数据库中,但是当我尝试在show / edit操作中呈现表单数据时,表单字段为空。
以下是我的模特
invoice.rb
class Invoice < ActiveRecord::Base
has_many :items
accepts_nested_attributes_for :items
end
item.rb
class Item < ActiveRecord::Base
belongs_to :invoice
accepts_nested_attributes_for :invoice
end
我的控制器
def index
@invoices = Invoice.all
end
def show
@invoice = Invoice.find(params[:id])
@item = @invoice.items.build
end
# GET /invoices/new
def new
@invoice = Invoice.new
@invoice.items.build #
end
# GET /invoices/1/edit
def edit
@invoice.items.build #
end
def create
@invoice = Invoice.new(invoice_params)
respond_to do |format|
if @invoice.save
format.html { redirect_to @invoice, notice: 'Invoice was successfully created.' }
format.json { render :show, status: :created, location: @invoice }
else
format.html { render :new }
format.json { render json: @invoice.errors, status: :unprocessable_entity }
end
end
end
private
def set_invoice
@invoice = Invoice.find(params[:id])
end
def invoice_params
params.require(:invoice).permit(:amount, :company, :contragent, :currency, :date, items_attributes: [ :item_name, :item_description, :item_cost, :item_quantity, :item_price ])
end
end
这是我的表格
<%= simple_form_for(@invoice) do |f| %>
<%= f.input_field :amount, class: "form-control" %>
<%= f.input_field :company, class: "form-control" %>
<%= f.input_field :currency, class: "form-control" %>
<%= f.input_field :contragent, class: "form-control" %>
<%= f.label :date, required: false %>
<%= f.fields_for :items do |h| %>
<%= h.error_notification %>
<%= h.label :item_name %>
<%= h.input_field :item_name, class: "form-control" %>
<%= h.label :item_description %>
<%= h.input_field :item_description, class: "form-control" %>
<%= h.label :item_cost %>
<%= h.input_field :item_cost, class: "form-control" %>
<%= h.label :item_quantity %>
<%= h.input_field :item_quantity, class: "form-control" %>
<%= h.label :item_price %>
<%= h.input_field :item_price, class: "form-control" %>
</br>
<% end %>
<%= f.button :submit, 'Submit Payment', class: 'btn btn-warning btn-sm', id: "submit_invoice" %>
<% end %>
保存表单后,我在我的rails控制台中得到了这个
2.1.1 :018 > p = Invoice.where(id: 38).limit(1)
Invoice Load (0.1ms) SELECT "invoices".* FROM "invoices" WHERE "invoices"."id" = ? LIMIT 1 [["id", 38]]
=> #<ActiveRecord::Relation [#<Invoice id: 38, amount: #<BigDecimal:7f8b6994b000,'0.875E3',9(18)>, company: "Alex", contragent: "Hi", currency: "NZD", date: "2016-02-17", created_at: "2016-01-18 22:23:36", updated_at: "2016-01-18 22:23:36">]>
2.1.1 :026 > p = Item.where(id: 7).limit(1)
Item Load (0.1ms) SELECT "items".* FROM "items" WHERE "items"."id" = ? LIMIT 1 [["id", 7]]
=> #<ActiveRecord::Relation [#<Item id: 7, item_name: "Test", item_description: "This is a test", item_cost: "200", item_quantity: "1", item_price: "400", created_at: "2016-01-18 22:23:36", updated_at: "2016-01-18 22:23:36", invoice_id: 38>]>
2.1.1 :027 >
因此,在项目记录中设置了发票ID,如何在显示和编辑操作中将其连接到发票?
答案 0 :(得分:1)
您需要嵌套资源:
NSExtension.NSExtensionMainStoryboard: Main
这将允许您的路由器访问发票中的项目:
Main.storyboard
详细了解嵌套资源:Rails Routing from the Outside In: Nested Resources。