在窗体中的Rails选择标签不会在编辑视图中填充值 [英] Rails select tag in form doesn't populate with value in the edit view

问题描述

我使用脚手架为成员模型生成了典型的rails _form。对于param：状态，我使用了一个select标签：

I have the typical rails _form generated by scaffold for a member model. For the param :state I am using a select tag:

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

使用辅助方法（美国州）：

Using a helper method (us states):

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

而对于parammember_since，我使用了select_year帮助器：

And for the param "member_since" I am using the select_year helper:

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

现在，这两种选择都可以创建新记录，但这两个字段都不会预先填入编辑记录视图。任何想法？

Now both of these selects work to create a new record, but neither field is pre-filled in the edit record view. Any thoughts?

推荐答案

<%= 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"} )   %>

UPDATE：

由于member_since是字符串，您需要将它转换为日期：

Since member_since is a string, you will need to convert it to date:

 <%= 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"} )   %>

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