ruby-on-rails – javascript函数无法在jquery-ajax中运行rails

var showDatePickers = function() {
  $('[data-field-type="date"]').datepicker({
    dateFormat: "yy-mm--dd",showOn: "both",buttonImageOnly: true,buttonImage: "/assets/blue-calendar-icon.png",buttonText: "Calendar"
  });
}

$(showDatePickers);

我只是在我的视图中发布了我的datepicker字段,

<div class="field">
  <%= f.label :Renewal_Date %>
  <%= f.text_field :Renewal_Date,readonly: 'readonly',data: {field_type: date}}
</div>

我将上述函数调用为单独的javascript文件.

$(function() {
  if ($('html.asset_contracts').length == 1) {
    $(document.body).on('ajax:success','.new_asset_contract,.edit_asset_contract',showDatePickers);
  }
});

当页面加载,编辑和新操作时,它工作正常.但是当rails验证错误显示datepicker函数不起作用时.它显示空白text_field.

仅供参考：这是一个ajax页面,新的,创建,更新和编辑操作作为ajax页面工作.所以,我在我的表单中添加了remote：true,我有new.js,edit.js,create.js和update.js

这是我的控制器,

def create
     @contract = Asset::Contract.new(params[:asset_contract])

     respond_to do |format|
       if @contract.save
         format.html { redirect_to asset_contracts_path,notice: "Successfully Created" }
         format.js
         format.json { render json: @contract,status: :created,location: @contract }
       else
         format.html { render action: "new" }
         format.js
         format.json { render json: @contract.errors,status: :unprocessable_entity }
       end
     end
   end



   def update
     @contract = Asset::Contract.find(params[:id])

     respond_to do |format|
       if @contract.update_attributes(params[:asset_contract])
         format.html { redirect_to asset_contracts_path,notice: "Succesfully Updated" }
         format.js
         format.json { head :no_content }
       else
         format.html { render action: "edit" }
         format.js
         format.json { render json: @contract.errors,status: :unprocessable_entity }
       end             
     end
   end

谢谢