从"belongs_to"形式创建两个相关模型.一个(导轨) [英] Create both associated models from the form of the "belongs_to" one (rails)

问题描述

希望我的连续提问对任何人都不成问题，我想请您提供有关如何从一种形式创建两个模型的帮助.

两个关联的模型是

class Employee < ActiveRecord::Base
  attr_accessible :name

  belongs_to :company
  attr_accessible :company_id
end

class Company < ActiveRecord::Base
  attr_accessible :name

  has_many :employees
end

，我想要的是在创建员工并且输入公司不存在时创建公司.没有当公司不存在时"的要求，这是我的代码:

employees/_form.html.erb

<%= simple_form_for(@employee) do |f| %>
  <%= simple_form_for(@company) do |cf| %>
    <%= f.input :name, label: 'Employee Name', :required => true %>
    <%= cf.input :title, label: 'Company Name', :required => true %>
  <% end %>
<% end %>

和employees_controller.rb

def new
  @employee = Employee.new
  @company = Company.new
end

[...]

def create
  @employee = Employee.new(params[:employee])
  @company = Company.new(params[:company])
  @employee.company_id = params[:company_id]

  respond_to do |format|
    if @employee.save
      format.html { redirect_to @employee, notice: 'Employee was successfully created.' }
      format.json { render json: @employee, status: :created, location: @employee }
    else
      format.html { render action: "new" }
      format.json { render json: @employee.errors, status: :unprocessable_entity }
    end
  end
end

这种员工与公司之间的关联(员工持有"公司ID的关联)，但是它并不能创建(或者，如果我理解得很好，实际上并不能保存)公司. /p>

如果我继续并在ID分配之前添加@company.save，一切似乎都还好.是吗?我不应该渲染new company form并在提交之后保存所有内容吗?

我整天都在网上搜索解决方案，但是在每种情况下，实施方式都是相反的:如何从新公司形式中创建一堆员工.

解决方案

好的，经过大量的实验，我得出以下结论:

employees/_form.html.erb

<%= simple_form_for(@employee) do |f| %>
  <%= simple_fields_for(@company) do |cf| %>
    <%= f.input :name, label: 'Employee Name', :required => true %>
    <%= cf.input :title, label: 'Company Name', :required => true %>
  <% end %>
<% end %>

employees_controller.rb

def create
  @employee = Employee.new(params[:employee])

  @company = Customer.find_or_create_by_name(params[:company][:name])
  @company.employees << @employee
  @company.save

  @employee.save
end

它比@RadBrad提供的答案稍微优雅一点，但也受到它的影响.

如果您需要了解如何实际填写company模型的所有属性，请遵循

employees/_form.html.erb

<%= simple_form_for(@employee) do |f| %>
  <%= simple_form_for(@company) do |cf| %>
    <%= f.input :name, label: 'Employee Name', :required => true %>
    <%= cf.input :title, label: 'Company Name', :required => true %>
  <% end %>
<% end %>

and employees_controller.rb

def new
  @employee = Employee.new
  @company = Company.new
end

[...]

def create
  @employee = Employee.new(params[:employee])
  @company = Company.new(params[:company])
  @employee.company_id = params[:company_id]

  respond_to do |format|
    if @employee.save
      format.html { redirect_to @employee, notice: 'Employee was successfully created.' }
      format.json { render json: @employee, status: :created, location: @employee }
    else
      format.html { render action: "new" }
      format.json { render json: @employee.errors, status: :unprocessable_entity }
    end
  end
end

This some kind of association between the employee and the company (that of the employee "holding" the company id) but it doesn't create (or, if I understand well, doesn't actually save) the company.

If I go on and add @company.save before the id assignment, everything seems okay. Is it, however? Shouldn't I render the new company form and have everything saved after that is submitted?

I have been searching online all day for the solution but in every case the implementation was performed the opposite way: How to create a bunch of employees from a new company form.

解决方案

Okay, after a lot of experimenting, I 've came down to this:

employees/_form.html.erb

<%= simple_form_for(@employee) do |f| %>
  <%= simple_fields_for(@company) do |cf| %>
    <%= f.input :name, label: 'Employee Name', :required => true %>
    <%= cf.input :title, label: 'Company Name', :required => true %>
  <% end %>
<% end %>

employees_controller.rb

def create
  @employee = Employee.new(params[:employee])

  @company = Customer.find_or_create_by_name(params[:company][:name])
  @company.employees << @employee
  @company.save

  @employee.save
end

It is slightly more elegant than the answer provided by @RadBrad but also influenced by it.

if you need to know how to actually fill in all the attributes of the company model, follow this

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