Question

提前感谢谁试图或解决问题。

我无法添加多个选项..我有一个模型 PriestProfile 和区域都有多对多关系..所以我想要的是用户创建时一个新的PriestProfile应该能够选择多个区域但是没有这样做..

这是我的代码..

（应用程序/控制器/ priest_profiles_controller.rb）

class PriestProfilesController < ApplicationController
  before_action :set_priest_profile, only: [:show, :edit, :update, :destroy]
  before_action :set_areaids, only: [:create]
  def update_cities
    @areas = Area.where("city_id = ?", params[:city_id])

      respond_to do |format|
        format.js
      end

  end 
  # GET /priest_profiles
  # GET /priest_profiles.json
  def index
    @priest_profiles = PriestProfile.all
  end

  # GET /priest_profiles/1
  # GET /priest_profiles/1.json
  def show
     @listOfCities= City.all
  end

  # GET /priest_profiles/new
  def new
    @priest_profile = PriestProfile.new
    @cities = City.all.order(:name)
    @areas = Area.where("city_id = ?", City.first.id).order(:name)

  end

  # GET /priest_profiles/1/edit
  def edit
  end

  # POST /priest_profiles
  # POST /priest_profiles.json

  def create
    @priest_profile = PriestProfile.new(priest_profile_params)

    respond_to do |format|
      if @priest_profile.save
        @priest_profile.areas <<  @areaids

        format.html { redirect_to @priest_profile, notice: 'Priest profile was successfully created.' }
        format.json { render :show, status: :created, location: @priest_profile }
      else
        format.html { render :new }
        format.json { render json: @priest_profile.errors, status: :unprocessable_entity }
      end
    end
  end

  # PATCH/PUT /priest_profiles/1
  # PATCH/PUT /priest_profiles/1.json
  def update
    respond_to do |format|
      if @priest_profile.update(priest_profile_params)
        format.html { redirect_to @priest_profile, notice: 'Priest profile was successfully updated.' }
        format.json { render :show, status: :ok, location: @priest_profile }
      else
        format.html { render :edit }
        format.json { render json: @priest_profile.errors, status: :unprocessable_entity }
      end
    end
  end

  # DELETE /priest_profiles/1
  # DELETE /priest_profiles/1.json
  def destroy
    @priest_profile.destroy
    respond_to do |format|
      format.html { redirect_to priest_profiles_url, notice: 'Priest profile was successfully destroyed.' }
      format.json { head :no_content }
    end
  end

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

    def set_areaids
      x = params[:priest_profile][:area_id]
      x.shift(0) #due to hidden field one empty initial element
      @areaids = Area.find(x)
    end
    # Never trust parameters from the scary internet, only allow the white list through.
    def priest_profile_params
      params.require(:priest_profile).permit(:name, :phone_wrk, :phone_pr, :religion, :icon, :brief, :description, :area_ids, :area_id, :city_id)
    end
end

（应用/视图/ priest_profile / _form.html.erb）

<%= form_for(@priest_profile) do |f| %>
  <div class="field">
    <%= f.label :name %><br>
    <%= f.text_field :name %>
  </div>

  <div class="field">
    <%= f.label :phone_wrk %><br>
    <%= f.text_field :phone_wrk %>
  </div>
 <!--=================================================-->
  <h3> <%= f.select :city_id, options_for_select(@cities.collect { |city|
    [city.name.titleize, city.id] }), {include_blank: "(Select City)"}, { id: 'cities_select'} %>


    <%= f.select :area_id, options_for_select(@areas.collect { |area|
    [area.name.titleize, area.id] }, 0), {}, 
                                         {id: 'areas_select',multiple: true}%></h3>
 <!--=================================================-->
 <br />
  <div class="actions">
    <%= f.submit %>
  </div>
<% end %>

（应用/模型/ priest_profile.rb）

class PriestProfile < ActiveRecord::Base
    validates :phone_wrk,:name, presence: true
    has_many :priest_areaships
    has_many :areas, through: :priest_areaships
    attr_accessor :city_id, :area_id, :area_ids
end

Answer 1

创建一个新的PriestProfile应该能够选择多个区域

#app/controllers/priests_profiles_controller.rb
class PriestsProfilesController < ApplicationController
    def new
       @priest_profile = PriestProfile.new
       @cities         = City.all.order(:name)
       @areas          = @cities.first.areas.order(:name)
    end

    def create
       @priest_profile = PriestProfile.new profile_params
       @priest_profile.save
    end

    private

    def profile_params
        params.require(:priest_profile).permit(:name, :phone_wrk, :city_id, :area_ids)
    end
end

#app/views/priests_profiles/new.html.erb
<%= render "form", locals: { priest_profile: @priest_profile } %>

#app/views/priests_profiles/_form.html.erb
#Never use instance vars in partials; always pass locals
<%= form_for priest_profile do |f| %>
    <%= f.text_field :name %>
    <%= f.text_field :phone_wrk %>
    <%= f.collection_select :city_id, @cities, :id, :name,  { prompt: "(Select City)" }, { id: 'cities_select'} %>
    <%= f.collection_select :area_ids, @areas, :id, :name, {}, {id: 'areas_select', multiple: true } %>
    <%= f.submit %>
<% end %>

解决这个问题的方法有两个方面：

检查HTML表单是否正确呈现

检查是否正在发送正确的参数

因为Rails只是呈现HTML表单，所以您需要确保您的字段名称正确，并且您正在构建正确的表单控件。

使用collection_select可以大大简化当前设置 - 这应该使用控制器中定义的变量值自动填充选择框。

要注意的重点是city_id和area_ids - 如果它们是正确的，那么HTML表单应该足够了。

-

第二步是查看表单传递给控制器的参数。这可以通过控制台或开发日志/log/development.log完成 - 它将显示通过表单提交发送的参数。

如果你有正确的参数，它应该保存。我怀疑你没有允许合适的参数。我已经包含area_ids - 收集参数的标准Rails实践;这可能是错误的，但只有当你观察到哪些帕尔马已经通过时才能显示。

接受多个选项rails

1 个答案: