Ruby-on-rails Rails 选择标记选定值
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Rails select tag selected value
提问by Yogzzz
My tag:
我的标签：
<%= select_tag(:option, options_for_select([['All', 1], ['Co', 2], ['Bought', 3], ['View', 4], ['Top API', 5], :selected => :option ])) %>
How do I set the selected value to which option is selected. For example, if I select ['Bought', 3], and submit, ['All', 1]option is selected. How can I display the selected value after the form is submitted.
如何将选定的值设置为选择的选项。例如，如果我选择['Bought', 3]并提交，['All', 1]则选择了选项。提交表单后如何显示选定的值。
回答by gabrielhilal
You did everything right, just close the options ]before the :selected => :option:
你做的一切都对，只需关闭]之前的选项:selected => :option：
instead of ...], selected: :option ])), change to ...]], selected: :option ))
而不是...], selected: :option ]))，改为...]], selected: :option ))
So, your code should be:
所以，你的代码应该是：
<%= select_tag(:option, options_for_select([['All', 1], ['Co', 2], ['Bought', 3], ['View', 4], ['Top API', 5]], selected: :option )) %>
回答by Jonathan MacDonald
Try this:
尝试这个：
<%= select_tag(:option, options_for_select([['All', 1], ['Co', 2], ['Bought', 3], ['View', 4], ['Top API', 5]], :selected => params[:option])) %>
This works perfectly in rails 4.2
这在 rails 4.2 中完美运行
回答by Gabriel Lucuy
In case you want to add a class to the tag:
如果您想向标签添加一个类：
<%= select_tag(:option, options_for_select([["Option 1",1],["Option 2",2],["Option 3",3]], params[:option] ), class:"select") %>
Worrking in rails 5.
5. 在轨道上工作
