我有一个脚手架'Customer.rb'模型和一个'Invoice.rb'模型。我希望人们从客户模型中选择现有客户，并在发票视图中添加所选选项的一些属性。
这是我的Invoice＃new 中的代码（@customer = Invoice_controller中的Customer.all）
<%= @customer.select(:company_name) do |f| %>
<h4>Customer:</h4>
<div class="well">
<address>
<strong class="text-dark"><%= f.company_name %></strong><br/>
<%= f.first_name + f.last_name if f.first_name.present? && f.last_name.present?%><br/>
<%= f.address_line_1 %><br/>
<%= f.address_line_2 if present? %>
</address>
</div>
<% end %>
</div>
发票控制器
class InvoicesController < ApplicationController
before_action :set_invoice, only: [:show, :edit, :update, :destroy]
# GET /invoices
# GET /invoices.json
def index
@invoices = Invoice.all
end
# GET /invoices/1
# GET /invoices/1.json
def show
end
# GET /invoices/new
def new
@invoice = Invoice.new
@customer = Customer.all
end
# GET /invoices/1/edit
def edit
end
# POST /invoices
# POST /invoices.json
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
# PATCH/PUT /invoices/1
# PATCH/PUT /invoices/1.json
def update
respond_to do |format|
if @invoice.update(invoice_params)
format.html { redirect_to @invoice, notice: 'Invoice was successfully updated.' }
format.json { render :show, status: :ok, location: @invoice }
else
format.html { render :edit }
format.json { render json: @invoice.errors, status: :unprocessable_entity }
end
end
end
# DELETE /invoices/1
# DELETE /invoices/1.json
def destroy
@invoice.destroy
respond_to do |format|
format.html { redirect_to invoices_url, notice: 'Invoice was successfully destroyed.' }
format.json { head :no_content }
end
end
private
# Use callbacks to share common setup or constraints between actions.
def set_invoice
@invoice = Invoice.find(params[:id])
end
# Never trust parameters from the scary internet, only allow the white list through.
def invoice_params
params.require(:invoice).permit(:number, :currency, :date, :duedate, :btwtotal, :subtotal, :total, :footer)
end
end
这显示了正确的信息，但它显示了Customers表中的所有列。 我不想让人们选择一个特定的专栏。比如让我们说;有人选择'可口可乐有限公司'从下拉列表中只看到可口可乐有限公司的信息（f.company_name：可口可乐有限公司等）
The Invoice.rb model contains 'has_one :customer'
The Customer.rb model contains 'belongs_to :invoice'
我尝试了导轨上的红宝石所有东西，但我似乎没有得到它。任何帮助都将很多赞赏
更新
发票#_form
<%= form_for(@invoice) do |f| %>
<% if @invoice.errors.any? %>
<div id="error_explanation">
<h2><%= pluralize(@invoice.errors.count, "error") %> prohibited this invoice from being saved:</h2>
<ul>
<% @invoice.errors.full_messages.each do |message| %>
<li><%= message %></li>
<% end %>
</ul>
</div>
<% end %>
<div class="container-fluid container-fullw">
<div class="row">
<div class="col-md-8">
<div class="panel panel-white">
<div class="panel-body">
<div class="invoice">
<div class="row invoice-logo">
<div class="col-sm-6">
<img alt="" src="">
</div>
<div class="col-sm-6">
<p class="text-dark">
<%= @invoice.number %> <small class="text-light"> 23-07-2016 </small>
</p>
</div>
</div>
<hr>
<div class="row">
<div class="col-sm-4">
<%= f.select :customer, :customer_id, options_for_select(@customers.map{ |customer| [customer.company_name, customer.id, {"data-some-field" => customer.company_name}] },
id: "my_select") %>
<h4>Klant:</h4>
<div class="well">
<address>
<strong class="text-dark"></strong><br/>
<%= f.text_field :company_name, id: "my_field" %>
<br>
<abbr title="Phone">P:</abbr> (123) 456-7890
</address>
<address>
<strong class="text-dark">E-mail:</strong>
<a href="mailto:#"> info@customer.com </a>
</address>
</div>
</div>
<div class="col-sm-4 pull-right">
<h4>Gegevens:</h4>
<ul class="list-unstyled invoice-details padding-bottom-30 padding-top-10 text-dark">
<li>
<strong>BTW #:</strong> 233243444
</li>
<li>
<strong>Bedrijfsnaam:</strong> Company B.V
</li>
<li>
<strong>IBAN:</strong> 1233F4343ABCDEW
</li>
<li>
<strong>Factuurdatum:</strong> 01/01/2016
</li>
<li>
<strong>Te betalen voor:</strong> 11/02/2016
</li>
</ul>
</div>
</div>
<div class="row">
<div class="col-sm-12">
<table class="table table-striped">
<thead>
<tr>
<th> # </th>
<th> Item </th>
<th class="hidden-480"> Description </th>
<th class="hidden-480"> Quantity </th>
<th class="hidden-480"> Unit Cost </th>
<th> Total </th>
</tr>
</thead>
<tbody>
<tr>
<td> 1 </td>
<td> Lorem </td>
<td class="hidden-480"> Drem psum dolor </td>
<td class="hidden-480"> 12 </td>
<td class="hidden-480"> $35 </td>
<td> $1152 </td>
</tr>
<tr>
<td> 2 </td>
<td> Ipsum </td>
<td class="hidden-480"> Consectetuer adipiscing elit </td>
<td class="hidden-480"> 21 </td>
<td class="hidden-480"> $469 </td>
<td> $6159 </td>
</tr>
<tr>
<td> 3 </td>
<td> Dolor </td>
<td class="hidden-480"> Olor sit amet adipiscing eli </td>
<td class="hidden-480"> 24 </td>
<td class="hidden-480"> $144 </td>
<td> $8270 </td>
</tr>
<tr>
<td> 4 </td>
<td> Sit </td>
<td class="hidden-480"> Laoreet dolore magna </td>
<td class="hidden-480"> 194 </td>
<td class="hidden-480"> $317 </td>
<td> $966 </td>
</tr>
</tbody>
</table>
</div>
</div>
<div class="row">
<div class="col-sm-12 invoice-block">
<ul class="list-unstyled amounts text-small">
<li>
<strong>Subtotaal:</strong>
<div class="field">
<%= f.text_field :subtotal %>
</div>
</li>
<!-- <li>
<strong>Discount:</strong>
</li> -->
<li>
<strong>BTW:</strong>
<div class="field">
<%= f.text_field :btwtotal %>
</div>
</li>
<li class="text-extra-large text-dark margin-top-15">
<strong >Totaal:</strong>
<div class="field">
<%= f.text_field :total %>
</div>
</li>
</ul>
<br>
</div>
</div>
</div>
<div class="panel-footer">
<%= @invoice.footer.present? ? @invoice.footer : "We verzoeken u vriendelijk het bovenstaande bedrag van
€ #{@invoice.total} voor #{@invoice.duedate} te voldoen op onze bankrekening onder vermelding van het
factuurnummer #{@invoice.number}. Voor vragen kunt u contact opnemen per e-mail." %>
</div>
</div>
</div>
</div>
<div class="col-md-4">
<div class="panel panel-white">
<div class="panel-body">
<div class="form-group">
<div class="field">
<%= f.label :Factuurnummer %><br>
<%= f.text_field :number, placeholder: '2016-0001' %>
</div>
<div class="form-group">
<%= f.label :Munteenheid %><br>
<%= f.select(:currency, [[' €', 1, title: 'Euro', value: 'EURO'], [' $', 2, title: 'US Dollar', value: 'USD'],
[' £', 3, title: 'GBP Pound', value: 'GBP']]) %>
</div>
<div class="field">
<%= f.label :factuurdatum %><br>
<%= f.date_select :date %>
</div>
<div class="field">
<%= f.label 'te betalen voor' %><br>
<%= f.date_select :duedate %>
</div>
<div class="field">
<%= f.label :footer %><br>
<%= f.text_area :footer %>
</div>
<div class="actions">
<%= f.submit 'opslaan', class: 'btn btn-primary btn-success' %>
<%= link_to 'annuleren', invoices_path, class: 'btn btn-primary btn-info' %>
<a onclick="javascript:window.print();" class="btn btn-primary float-right"> print <i class="fa fa-print"></i></a>
</div>
<% end %>
</div>
</div>
</div>
</div>
</div>
</div>
<!-- end: INVOICE -->
<script>
$("#my_select").change(function() {
var selection = $(this).find(":selected");
alert(selection.data("data-some-field"));
});
</script>
答案 0 :(得分：1)
你想要的比你想象的要复杂得多。任何时候你想要动态的东西，你将不得不依赖脚本。该视图在很大程度上是惰性的 - 它只显示控制器提供给它的信息，因此您需要JavaScript和可能的AJAX提供帮助。
首先，在invoice#new中复制您的字段名称，以便为查看代码的用户节省可能的混淆。
@customer = Customer.all
应该是：
@customers = Customer.all
通过这种方式，您可以清楚地指出一个集合而不是一个记录。
然后使用以下内容替换视图中的select：
<%= f.select :customer, options_for_select(@customers.map { | cust | [cust.name, cust.id, 'data-some-field' => cust.some_field] }), { id: "my_select" } %>
您在此处执行的操作是传递使用HTML数据属性的select和options_for_select来传递其他信息。您将不得不修改invoice#new来构建此信息，这是我留给您的练习，因为我不知道您希望显示什么。
在视图中添加文本字段以显示新信息：
text_field_tag (:some_field, id: "my_field")
然后，您必须使用以下JavaScript修改invoice.js资产：
$("#my_select").change(function()
{
var selection = $(this).find(":selected");
getElementById("my_field").value = selection.data("data-some-field");
});
答案 1 :(得分：1)
我想说你应该将两者都与一个联接表联系起来..联接表将保留客户和发票ID的记录，例如
session.acclevel然后在发票和客户创建行动
class Customer < ApplicationRecord
has_many :join_table
has_many :invoices, :through => :join_table
end
class Invoice < ApplicationRecord
has_many :join_table
has_many :customers, :through => :join_table
end
class JoinTable < ApplicationRecord
belongs_to :invoice
belongs_to :customer
end
结束
这将创建连接表对象，将每个客户与发票及其ID链接
然后调整join_table.rb模型
def create
@invoice = Invoices.new(invoice_params)
if @invoice.save
@invoice.customers << Customer.all
redirect_to @invoice
else
render new
end
然后您应该在发票显示页面中有一个所有客户的列表，并将join_table记录显示为虚拟但相同的值