Question

我是Rails 5中的第一个应用程序（Ruby 2.4.0），我有几个问题;最大的（目前）是从嵌套表格中检索参数。

我的问题以及下面的文件：

1）首先，这是创建模型嵌套表单并在连接表中写入的正确方法吗？

2）如何从嵌套表单中的select中获取params：我无法检索city_id（来自app / models / link_patient_address_city.rb中）并将其存储在link_patient_address_cities表中。

3）如何才能获得刚刚创建的患者ID，以便在link_patient_address_cities表中写入？

感谢。

我有3张桌子：

患者（：id，：姓名）
一个JOIN表link_patient_address_cities（：id，：patient_id，：city_id）
cities（：id，：name）

当我创建新患者时，我想将city_id和新创建的patient_id存储在link_patient_address_cities表中。

这些是我的模型，控制器和表单文件：

应用/模型/ patient.rb

class Patient < ApplicationRecord
has_many :link_patient_address_cities
has_many :cities, :through => :link_patient_address_cities
has_many :phone_contacts
has_many :patient_emails
def
link_patient_address_cities_attributes=(attributes)
    # Process the attributes hash
  end
end

app / models / link_patient_address_city.rb

class LinkPatientAddressCity < ApplicationRecord
belongs_to :patient #, index: true
belongs_to :city #, index: true

    def self.insert_recapito(p)
    l=LinkPatientAddressCity.new
    l.city_id=p[:link_patient_address_cities_attributes[:city_id]]
    l.patient_id=2
    l.save
    end
end

app / controllers / link_patient_address_cities_controller.rb

class LinkPatientAddressCitiesController < ApplicationController
  before_action :set_link_patient_address_city, only: [:show, :edit, :update, :destroy]

  # GET /link_patient_address_cities
  # GET /link_patient_address_cities.json
  def index
    @link_patient_address_cities = LinkPatientAddressCity.all
  end

  # GET /link_patient_address_cities/1
  # GET /link_patient_address_cities/1.json
  def show
  end

  # GET /link_patient_address_cities/new
  def new
    @link_patient_address_city = LinkPatientAddressCity.new
  end

  # GET /link_patient_address_cities/1/edit
  def edit
  end

  # POST /link_patient_address_cities
  # POST /link_patient_address_cities.json
  def create
    @link_patient_address_city = LinkPatientAddressCity.new(link_patient_address_city_params)

    respond_to do |format|
      if @link_patient_address_city.save
        format.html { redirect_to @link_patient_address_city, notice: 'Link patient address city was successfully created.' }
        format.json { render :show, status: :created, location: @link_patient_address_city }
      else
        format.html { render :new }
        format.json { render json: @link_patient_address_city.errors, status: :unprocessable_entity }
      end
    end
  end

  # PATCH/PUT /link_patient_address_cities/1
  # PATCH/PUT /link_patient_address_cities/1.json
  def update
    respond_to do |format|
      if @link_patient_address_city.update(link_patient_address_city_params)
        format.html { redirect_to @link_patient_address_city, notice: 'Link patient address city was successfully updated.' }
        format.json { render :show, status: :ok, location: @link_patient_address_city }
      else
        format.html { render :edit }
        format.json { render json: @link_patient_address_city.errors, status: :unprocessable_entity }
      end
    end
  end

  # DELETE /link_patient_address_cities/1
  # DELETE /link_patient_address_cities/1.json
  def destroy
    @link_patient_address_city.destroy
    respond_to do |format|
      format.html { redirect_to link_patient_address_cities_url, notice: 'Link patient address city was successfully destroyed.' }
      format.json { head :no_content }
    end
  end

  private
    # Use callbacks to share common setup or constraints between actions.
    def set_link_patient_address_city
      @link_patient_address_city = LinkPatientAddressCity.find(params[:id])
    end

    # Never trust parameters from the scary internet, only allow the white list through.
    def link_patient_address_city_params
      params.require(:link_patient_address_city).permit(:last_address)
    end
end

应用/模型/ city.rb

class City < ApplicationRecord
    belongs_to :province #, index: true
    has_many :link_patient_address_cities
    has_many :patients, :through => :link_patient_address_cities
end

/app/views/patients/_form.html.erb

<%= form_for(patient) do |f| %>
<%= f.label : name %>
<%= f.text_field : name %>
<%= f.fields_for :link_patient_address_cities do |lpac_form| %>
<%= lpac_form.collection_select :city_id, City.order(:city_name), :city_code, :city_name, {include_blank:"Select one..."}, {class: "form-control"} %>
<% end %>
<% f.submit %>
<% end %>

生成的选择标记为：

<select class="form-control" name="patient[link_patient_address_cities_attributes][0][city_id]" id="patient_link_patient_address_cities_attributes_0_city_id">

写入连接表从嵌套表单

0 个答案: