Ruby-on-rails 如何根据不同的用户角色默认选中单选按钮？
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How to make radio button checked by default based on different user role?
提问by logesh
<% if role.name == "Administrator" %>
<%= f.radio_button:status,'available', :checked => (params[:status] == nil ? true : params[:status]) %><label>Available</label>
<%= f.radio_button:_status,'not available' %><label>Not Available</label>
<% else %>
<%= f.radio_button:_status,'available' %><label>Available</label>
<%= f.radio_button:_status,'not available' %><label>Not Available</label>
<% end %>
By default i want the availableradio button to be checked in case of administrator and not availableradio button for rest of user. But he can change it and when viewing for editing it should show the one he/she has selected and not the default one.
默认情况下，我希望在available管理员和not available其他用户的单选按钮的情况下选中单选按钮。但是他可以更改它，并且在查看以进行编辑时，它应该显示他/她选择的那个而不是默认的。
How can i do this? please help me.
我怎样才能做到这一点？请帮我。
回答by Bachan Smruty
Try the following code.
试试下面的代码。
<%= f.radio_button:_status,'available', :checked => (role.name == "Administrator") %><label>Available</label>
<%= f.radio_button:_status,'not available', :checked => (role.name != "Administrator") %><label>Not Available</label>
回答by Rodrigo Garcia
If you take a look at the documentation for rails radio_button_tagyou would see it accepts the following params:
如果您查看 rails radio_button_tag的文档，您会看到它接受以下参数：
radio_button_tag(name, value, checked = false, options = {})
So it would be enough the following code
所以下面的代码就足够了
<%= f.radio_button:_status,'available', role.name == "Administrator" %><label>Available</label>
<%= f.radio_button:_status,'not available', role.name != "Administrator" %><label>Not Available</label>
Without the need of adding a "checked" property that might result in an unwanted behaviour
无需添加可能导致不良行为的“已检查”属性
