传递数组到select_tag

Question

我现在有这个作为搜索：

<%= form_tag users_path, :controller => 'users', :action => 'townsearch', :method => 'get' do %> 
    <%= select_tag :county, params[:county] %> 
    <%= submit_tag 'search'%> 
<% end %> 

我在我的用户模型下表：

COUNTY_OPTIONS = [ "Avon", "Bedfordshire", "Berkshire", "Borders", "Buckinghamshire", "Cambridgeshire","Central", 
       "Cheshire", "Cleveland", "Clwyd", "Cornwall", "County Antrim", "County Armagh", "County Down", 
       "County Fermanagh", "County Londonderry", "County Tyrone", "Cumbria", "Derbyshire", "Devon", 
       "Dorset", "Dumfries and Galloway", "Durham", "Dyfed", "East Sussex", "Essex", "Fife", "Gloucestershire", 
       "Grampian", "Greater Manchester", "Gwent", "Gwynedd County", "Hampshire", "Herefordshire", "Hertfordshire", 
       "Highlands and Islands", "Humberside", "Isle of Wight", "Kent", "Lancashire", "Leicestershire", "Lincolnshire", 
       "Lothian", "Merseyside", "Mid Glamorgan", "Norfolk", "North Yorkshire", "Northamptonshire", "Northumberland", 
       "Nottinghamshire", "Oxfordshire", "Powys", "Rutland", "Shropshire", "Somerset", "South Glamorgan", "South Yorkshire", 
       "Staffordshire", "Strathclyde", "Suffolk", "Surrey", "Tayside", "Tyne and Wear", "Warwickshire", "West Glamorgan", 
       "West Midlands", "West Sussex", "West Yorkshire", "Wiltshire", "Worcestershire"] 

我不知道该怎么办我所有的county_options列表进入下拉菜单？

Answer 1

查看API documentation的select_tag。

它说：

select_tag(name, option_tags = nil, options = {}) 

哪里option_tags是一个包含选择框的选项标签的字符串。您可以使用其他帮助器方法将容器转换为一串选项标签。

第一个例子：

select_tag "people", options_from_collection_for_select(@people, "id", "name") 
# <select id="people" name="people"><option value="1">David</option></select> 

这产生从特定模型数据选择标记。你可以使用options_for_select。

<%= form_tag users_path, :controller => 'users', :action => 'townsearch', :method => 'get' do %> 
    <%= select_tag :county, options_for_select(User::COUNTY_OPTIONS) %> 
    <%= submit_tag 'search'%> 
<% end %> 

Answer 2

我相信你想使用collection_select帮手。

http://api.rubyonrails.org/classes/ActionView/Helpers/FormOptionsHelper.html#M001593

另请参阅相关的：Drop down box in Rails