Question

我正在尝试使用下拉菜单修改表单，该菜单中填充了来自名为teacher_occupations的表的值。

在整个过程中，我从另一个表单下拉菜单中获得灵感，使用区域做同样的事情。

以下是表单代码：

<div class="row">
  <div class="col-md-12">
    <div class="form-group">
      <%= form.label :region_id, class: 'form-label form-label--required' %>
      <%= form.collection_select :region_id, available_regions, :id, :name, { prompt: true }, class: 'form-control form-control--select dropdownSelect' %>
    </div>
  </div>
</div>

<div class="row">
  <div class="col-md-12">
    <div class="form-group">
      <%= form.label :teacher_occupation_id, class: 'form-label form-label--required' %>
      <%= form.collection_select :teacher_occupation_id, available_teacher_occupations, :id, :name, {prompt: true}, class: 'form-control form-control--select dropdownSelect' %>
    </div>
  </div>
</div>

但是当我运行网页时，我有一个未定义的方法`teacher_occupation_id'用于＃错误。

我尝试使用 TeacherCoordinates.new.methods - Object.new.methods 输出视图的实例方法我可以看到region_id，teacher_occupation，但没有teacher_occupation_id。

我错过了什么？

Answer 1

你应该改变

HttpWebRequest myReq = (HttpWebRequest)WebRequest.Create(FilePath);
using (HttpWebResponse myResp = (HttpWebResponse)myReq.GetResponse()) {
    using (Stream stream = myResp.GetResponseStream()) {
    HttpResponse resp = HttpContext.Current.Response;
    resp.Clear();
    resp.ContentType = "Application/msword";
    resp.AddHeader("Content-Disposition", "attachment; filename=xyz.doc");
    int count = 0;
                do
                {
                    byte[] buf = new byte[10240];
                    count = stream.Read(buf, 0, 10240);
                    resp.OutputStream.Write(buf, 0, count);
                    resp.Flush();
                } while (stream.CanRead && count > 0);
    }
}

到

<%= form.label :teacher_occupation_id, class: 'form-label form-label--required' %>
<%= form.collection_select :teacher_occupation_id, available_teacher_occupations, :id, :name, {prompt: true}, class: 'form-control form-control--select dropdownSelect' %>

未定义的方法问题

1 个答案: