ruby-on-rails - 表单中的 Rails 选择标记不会填充编辑 View 中的值

Question

我有由脚手架为成员模型生成的典型rails _form。对于参数 :state 我使用选择标签:

 <%= f.select :state, options_for_select(us_states),  { :include_blank=>true, :prompt =>  'State' }, { :class => 'form-control' } %>

使用辅助方法(美国国家):

def us_states
[
['AK', 'AK'],
['AL', 'AL'], #etc

对于参数“member_since”，我使用 select_year 助手:

<%= select_year(0, {:start_year => 2013, :end_year => 1920, :field_name => 'member_since', :prompt => 'Choose year', prefix: :member}, {:class => "form-control"} )   %>

现在，这两个选择都可以创建新记录，但两个字段都没有在编辑记录 View 中预先填充。有什么想法吗？

Answer 1

<%= f.select :state, us_states,  { :include_blank=>true, :prompt =>  'State' }, { :class => 'form-control' } %>

和

<%= select_year(f.object.member_since, {:start_year => 2013, :end_year => 1920, :field_name => 'member_since', :prompt => 'Choose year', prefix: :member}, {:class => "form-control"} )   %>

更新:

由于member_since是一个字符串，因此您需要将其转换为日期:

 <%= select_year(Date.new(f.object.member_since.to_i), {:start_year => 2013, :end_year => 1920, :field_name => 'member_since', :prompt => 'Choose year', prefix: :member}, {:class => "form-control"} )   %>