相关领域无法从数据库

我想获得一个嵌套的属性，形成检测已经加载到数据库中的值装载值，任何人都可以看到什么是错这个代码相关领域无法从数据库

控制器

def edit 
    @merchant = Merchant.find(params[:id]) 
    @states = State.form_selector 
    @merchant.build_address if @merchant.address1.nil? 
    @merchant.build_account if @merchant.bsb.nil? 
    @products = Product.all 
    end

查看

= form.fields_for :address do |address_fields| 
    = address_fields.hidden_field :address_type_id, value: 4 
    = address_fields.hidden_field :default, value: true 
    .mdl-textfield.mdl-js-textfield.mdl-textfield--floating-label.mdl-cell.mdl-cell--12-col 
     = address_fields.text_field :address1, class: 'mdl-textfield__input' 
     = address_fields.label :address1, class: 'mdl-textfield__label' 
    .mdl-textfield.mdl-js-textfield.mdl-textfield--floating-label.mdl-cell.mdl-cell--12-col 
     = address_fields.text_field :address2, class: 'mdl-textfield__input' 
     = address_fields.label :address2, class: 'mdl-textfield__label' 
    .mdl-textfield.mdl-js-textfield.mdl-textfield--floating-label.mdl-cell.mdl-cell--6-col 
     = address_fields.text_field :city, class: 'mdl-textfield__input' 
     = address_fields.label :city, class: 'mdl-textfield__label' 
    .mdl-textfield.mdl-js-textfield.mdl-textfield--floating-label.mdl-cell.mdl-cell--2-col 
     = address_fields.text_field :zip_code, class: 'mdl-textfield__input', :pattern => '^(0[289][0-9]{2})|([1345689][0-9]{3})|(2[0-8][0-9]{2})|(290[0-9])|(291[0-4])|(7[0-4][0-9]{2})|(7[8-9][0-9]{2})$' 
     = address_fields.label :zip_code, class: 'mdl-textfield__label' 
     %span.mdl-textfield__error= t('.postcode_error') 
    .mdl-textfield.mdl-js-textfield.mdl-textfield--floating-label.mdl-cell.mdl-cell--3-col 
     = address_fields.select :state_id, @states, :include_blank => true 
     = address_fields.label :state_id, class: 'mdl-textfield__label'

来源

2016-08-15 Paul ' Whippet' McGuane

你在你的Merchant模型中有'accep_nested_attributes_for：address'吗？ – coorasse

是的数据被提交到数据库，但是当你去编辑那个元素时，它从来没有被保存过 –

但是它叫做地址1还是地址？你猜他们混淆我猜：'@ merchant.build_address if @ merchant.address1.nil？' – coorasse

@merchant.address返回一个集合，即使null返回一个数组。

@merchant.address # [] 
@merchant.address.nil? # false 
@merchant.address.blank? # true 

def edit 
    @merchant = Merchant.find(params[:id]) 
    @states = State.form_selecto 
    @merchant.build_address if @merchant.address.blank? 
    @merchant.build_account if @merchant.bsb.blank? 
    @products = Product.all 
end

但我更喜欢在视图中使用这种方式。因为这样你删除了很多你的控制器操作代码#edit #new #update #create

view 
- form.object.build_address if form.object.blank? 
= form.fields_for :address do |address_fields| 
    = address_fields.hidden_field :address_type_id, value: 4

来源

2016-08-15 09:23:14

使用.blank仍然让我得到相同的结果 –

显示您的模型'merchant.rb' –

你知道这宝石吗？ https://github.com/charliesome/better_errors –

相关领域无法从数据库

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