Question

undefined local variable or method `comment' for #<#<Class:0xb6d2fd0>:0xc077dd8>

这就是我的_comment.html.erb部分看起来像

<div class="media">
<%= link_to '#', class: 'pull-left' do %>
    <%= image_tag(comment.user.avatar.small.url) if comment.user.avatar? %>
<% end %>
<div class="media-body">
    <small>
        <%= comment.user.name %> commented <%= time_ago_in_words(comment.created_at) %> ago
        <% if policy(comment).destroy? %>
            | <%= link_to "Delete", [@topic, @post, comment], method: :delete %>
        <% end %>
    </small>
</div>

我的comments_controller.rb的创建部分

def create
@post = Post.find(params[:post_id])
@comment = current_user.comments.build(comment_params)
@comment.post = @post 
authorize @comment 

if @comment.save
    redirect_to @post, notice: "Comment was saved successfully."
else
    flash[:error] = "Error creating comment. Please try again."
    render :new
end

结束

以及我在帖子中的呈现方式#show view

<div>
    <%= render :partial => "comments/comment", local: {comment: @comment} %>
</div>

Answer 1

您没有将任何本地人传递给此部分：

<%= render :partial => "comments/comment" %>

你想要这样做：

<%= render :partial => "comments/comment", :locals => { :comment => @comment } %>

或使用快捷方式：

<%= render 'comments/comment', :comment => @comment %>

Answer 2

您在comment部分声明了名为_comment.html.erb的本地变量。

您需要从控制器传递@comment，如下所示：

<%= render :partial => "comments/comment", locals: { comment: @comment } %>

请查看Layouts and Rendering Rails指南以获取更多信息。

未定义的局部变量或方法`comment'for＃＆lt;＃<class：0xb6d2fd0>：0xc077dd8＆gt; </class：0xb6d2fd0>

2 个答案: