rails 添加发送消息时显示 ActiveRecord_Associations 错误 link

Question

我有一个 rails 应用程序，用户可以在其中添加 post，其他用户可以对其发表评论我正在尝试向发表评论的用户添加直接消息 link，我按照关于 Whosebug

的建议尝试了这样的事情

_form.html.erb

<%= form_for :conversation, url: :conversations, html: { class: "" } do |f| %>
<div class="form-group">
  <%= f.label :recipients %>
  <%= hidden_field_tag(:recipient_id, "#{@user.id}") %></div>
<div class="form-group">
  <%= f.label :subject %>
  <%= f.text_field :subject, placeholder: "Subject", class: "form-control" %>
</div>
<div class="form-group">
  <%= f.label :message %>
  <%= f.text_area :body, class: 'form-control',placeholder: "Type your message here", rows: 4  %>
</div>

<%= f.submit "Send Message", class: "btn btn-success" %>

<% end %>

show.html.erb

<%= link_to 'Send Message', new_conversation_path(:recipient_id => @post.comments.user.id), class: 'send-message-icon' %>

**conversation_controller.rb**
def new
    @user = User.find_by(id: params[:recipient_id])
  end

   def create
    recipients = User.find_by(id: params[:recipient_id])
    conversation = current_user.send_message(recipients, conversation_params[:body], conversation_params[:subject]).conversation
    flash[:success] = "Your message was successfully sent!"
    respond_to do |format|
      format.html {redirect_to conversation_path(conversation)}
      format.js
    end
  end

但是出现以下错误

undefined method `user' for #<Comment::ActiveRecord_Associations_CollectionProxy:0x93b1018>

我正在使用邮箱 gem 来实现消息传递功能。

Answer 1

假设您有一个 comments table，其中有一列 user_id

<% @post.comments.each do |comment| %>
  <%= link_to 'Send Message', new_conversation_path(recipient_id: comment.user_id) %>

rails 添加发送消息时显示 ActiveRecord_Associations 错误 link

rails showing ActiveRecord_Associations error while adding a send message link

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