Question

我试图使用activerecord查询获取特定行内的行的值。我已经完成了所有的rails文档，但似乎无法找到出路。

因此，我所谈论的表格包含这些行：

id，flaggable_type，flaggable_id，flagger_type，reason，created_at， updated_at和flag_processed_at

我试图通过以下方式获取flag_processed_at的值：

<% flagged_unprocessed = current_message_flaggings.find(resource.id).flag_processed_at%>

我有这个错误

11:37:18 web.1    | ActionView::Template::Error (undefined method `flag_processed_at' for #<Enumerator: [237]:find(238)>):
11:37:18 web.1    |     1: <% flagged = current_message_flaggings.include?(resource.id) %>
11:37:18 web.1    |     2: <% flagged_unprocessed = current_message_flaggings.find(resource.id).flag_processed_at%>
11:37:18 web.1    |     3: 
11:37:18 web.1    |     4: <% if resource.archived_by?(current_user) %>
11:37:18 web.1    |     5:   <%= render partial: 'app/messages/message/archived', locals: { message: resource } %>
11:37:18 web.1    |   app/views/app/messages/_message.html.erb:2:in `_app_views_app_messages__message_html_erb__2724530553012578480_69900141016240'
11:37:18 web.1    |   app/views/app/conversations/show.html.erb:20:in `block in _app_views_app_conversations_show_html_erb__3548922752939129799_69900161876900'
11:37:18 web.1    |   app/views/app/conversations/show.html.erb:17:in `_app_views_app_conversations_show_html_erb__3548922752939129799_69900161876900'
11:37:18 web.1    | 
11:37:18 web.1    |

Answer 1

当您从数组中调用 find 时，

Rails会返回枚举器类：

YourModel.where(id: xxx).to_a.find(xxx)

返回枚举器

确保您的 current_message_flaggings var不是数组

如何从具有条件的视图中获取行的值

1 个答案: