Ruby on rails 未定义的方法';合并';至于;测试“:字符串-Rails 3.1
我有一个集合\u选择:Ruby on rails 未定义的方法';合并';至于;测试“:字符串-Rails 3.1,ruby-on-rails,ruby-on-rails-3,ruby-on-rails-3.1,Ruby On Rails,Ruby On Rails 3,Ruby On Rails 3.1,我有一个集合\u选择: <%= form_for(@feedback) do |f| %> <div class="field"> <%= f.label :poster_id %><br /> <%= f.collection_select :feedback, :poster_id, @users, :id, @user.username, :prompt => "Select your username" %><br
<%= form_for(@feedback) do |f| %>
<div class="field">
<%= f.label :poster_id %><br />
<%= f.collection_select :feedback, :poster_id, @users, :id, @user.username, :prompt => "Select your username" %><br />
<%= f.number_field :poster_id %>
</div>
<% end %>
“选择您的用户名”%>
这是错误消息:
ActionView::Template::Error (undefined method `merge' for "test":String):
15:
16: <div class="field">
17: <%= f.label :poster_id %><br />
18: <%= f.collection_select :feedback, :poster_id, @users, :id, @user.username %><br />
19: <%= f.number_field :poster_id %>
20: </div>
21: <div class="field">
app/views/feedbacks/_form.html.erb:18:in `block in _app_views_feedbacks__form_html_erb__3181571289116259961_2154876620'
app/views/feedbacks/_form.html.erb:3:in `_app_views_feedbacks__form_html_erb__3181571289116259961_2154876620'
ActionView::Template::Error(未定义“test”的“merge”方法:String):
15:
16:
17:
18:
19:
20:
21:
app/views/feedbacks/_form.html.erb:18:in`block in_app_views_feedbacks_form_html_erb_3181571289116259961_2154876620'
app/views/feedbacks/_-form.html.erb:3:in`_-app\u-views\u-feedbacks\u-form\u-html\u-erb\u 3181571289116259961\u 2154876620'
“test”是由@user.username
返回的用户名
如何解决此问题?所选集合的签名为:
def collection_select method, collection, value_method, text_method, options = {}, html_options = {}
我不确定你想做什么,也许这就是你想要的:
<%= f.collection_select :poster_id, @users, :id, :username, :prompt => "Select your username" %><br />
“选择您的用户名”%>
我必须以这种方式思考输入,才能让它在我的头脑中有意义
集合\选择“模型字段”、“下拉菜单中的选项集合”、“值的模型字段”、“要在菜单中显示的模型字段”
这让我明白了这正是我想要的。我很难理解
collection\u select
的定义。谢谢你的帮助。我如何设置默认值。例如,假设我希望它自动选择@user.id
(假设该值正确)。我该怎么做?我尝试在末尾添加:default=>@user.id
标志,但没有成功。