[英]How can i add form_select to some fixed drop-down in rails app
我使用下拉列表作为表单的输入，下拉列表取决于用户。 现在我想为每个用户添加“N/A”下拉列表。 在我现有的代码中我该怎么做？
<%= form.select :responsibility, options_for_select(@responsibilities.collect{ |responsibility| [responsibility.responsibility_matrix] }), { prompt: { responsibility: ' ' } } %>
这是你想要的？
<%= form.select :responsibility, options_for_select(@responsibilities.collect{ |responsibility| [responsibility.responsibility_matrix] }.unshift(['N/A', 'N/A'])), { prompt: { responsibility: ' ' } } %>
如何在Rails中向collection_select（下拉列表）添加/删除值？
[英]How do I add/remove values to a collection_select (Drop-Down List) in Rails?
如何将默认选择的“选择字段”选项添加到Rails的下拉菜单中？
[英]How can I add default selected Choose a field option to my drop-down in rails?
如何在表单中通过下拉菜单显示HABTM关系并选择添加更多内容？
[英]How do I present a HABTM relationship with a drop-down menu in a form and have an option to add more?
如何在Ruby on Rails中修复不显示任何项目的Navbar下拉菜单
[英]How can I fix a Navbar drop-down menu in Ruby on Rails that does not show any of the items
如何使用带硒的页面对象宝石（红宝石和黄瓜）单击div（下拉）
[英]How I can click on div(drop-down) using page-object gem with selenium (ruby-on-rails and cucumber)
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