简化select_tag/form

来源：互联网发布：webclient没执行js 编辑：程序博客网时间：2024/06/05 07:45

在model里新建

  CHANNEL_TYPES = {     '信号源': :signal_source,    '直播轮播': :live_and_rotate,    '我的': :my_channel,    'C 频道': :c_channel  }

并增加方法

  def channel_type_human    CHANNEL_TYPES.invert[channel_type.to_sym]  end

在view/form里可以直接用

      <div class="form-group">        <%= f.label :channel_type,"频道类型", class: "col-sm-2 control-label" %>        <div class="col-sm-2">          <%= f.select :channel_type, options_for_select(LauncherChannel::CHANNEL_TYPES, @launcher_channel.channel_type),            {}, class: "form-control" %>        </div>      </div>

之前没有加{}，由于默认是四个参数的，最后一个才是html_option

Wraps ActionView::Helpers::FormOptionsHelper#select for form builders:<%= form_for @post do |f| %>  <%= f.select :person_id, Person.all.collect { |p| [ p.name, p.id ] }, include_blank: true %>  <%= f.submit %><% end %>Please refer to the documentation of the base helper for details.Source: hide | on GitHub# File actionview/lib/action_view/helpers/form_options_helper.rb, line 776def select(method, choices = nil, options = {}, html_options = {}, &block)  @template.select(@object_name, method, choices, objectify_options(options), @default_options.merge(html_options), &block)endsubmit(value=nil, options={})

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