Rails Form Builder - 如何放置 html 属性答案

【问题标题】：Rails Form Builder - How to place html attributesRails Form Builder - 如何放置 html 属性
【发布时间】：2017-10-18 16:42:08
【问题描述】：

我有一个 server_form 迭代，我在其中放置了 class: 'form-control' 它工作正常，除了最后一次迭代|spec_fields|

= form_for @server do |server_form|
  = server_form.label :hostname
  = server_form.text_field :hostname, class: 'form-control'

  = server_form.label :description
  = server_form.text_field :description, class: 'form-control'

  = server_form.fields_for :spec do |spec_fields|
    Count of CPUs  : #{spec_fields.text_field :cpucount}
    RAM (GB): #{spec_fields.text_field :ram_gb}
    HD (GB): #{spec_fields.text_field :hd_gb}
    HD used (GB): #{spec_fields.text_field :hdused_gb}

我的问题是：如何将form-control 类也放入|spec_fields|

【问题讨论】：

标签： ruby-on-rails nested-forms

【解决方案1】：

当您在 fields_for 块之外执行此操作时：

= form_for @server do |server_form|
  = server_form.label      :hostname
  = server_form.text_field :hostname,    class: 'form-control'
  = server_form.label      :description
  = server_form.text_field :description, class: 'form-control'

  = server_form.fields_for :spec do |spec_fields|
    Count of CPUs  : #{ spec_fields.text_field :cpucount,  class: 'form-control' }
    RAM (GB):        #{ spec_fields.text_field :ram_gb,    class: 'form-control' }
    HD (GB):         #{ spec_fields.text_field :hd_gb,     class: 'form-control' }
    HD used (GB):    #{ spec_fields.text_field :hdused_gb, class: 'form-control' }

【讨论】：

【解决方案2】：

从docs 你必须在块之前传递它，所以......

= server_form.fields_for :spec, class: 'form-control' do |spec_fields|
    Count of CPUs  : #{spec_fields.text_field :cpucount}
    RAM (GB): #{spec_fields.text_field :ram_gb}
    HD (GB): #{spec_fields.text_field :hd_gb}
    HD used (GB): #{spec_fields.text_field :hdused_gb}

应该有效

【讨论】：