Ruby on rails 为什么我在用户索引错误(RubyonRails)中遇到了命名错误
我看了很多其他的线程,在过去的几个小时里都在看,但我还是没能弄明白 我正在使用另一个视图页面中的同一行代码 以下是错误:Ruby on rails 为什么我在用户索引错误(RubyonRails)中遇到了命名错误,ruby-on-rails,ruby,ruby-on-rails-3,Ruby On Rails,Ruby,Ruby On Rails 3,我看了很多其他的线程,在过去的几个小时里都在看,但我还是没能弄明白 我正在使用另一个视图页面中的同一行代码 以下是错误: app/views/users/_user.html.erb其中第4行出现: undefined method `microposts' for nil:NilClass 这是来自Rubytutorial演示应用程序,如果您熟悉的话。这段代码曾在views\users\show.html.erb中使用过,我试图看看它是否能在views\users\u user.html.e
app/views/users/_user.html.erb
其中第4行出现:
undefined method `microposts' for nil:NilClass
这是来自Rubytutorial演示应用程序,如果您熟悉的话。这段代码曾在views\users\show.html.erb
中使用过,我试图看看它是否能在views\users\u user.html.erb
上运行,但我发现了错误
我正在重用的代码是:
<%= @user.microposts.count %>
下面是调用分部函数的完整视图(_user.html.erb)
<li>
<%= gravatar_for user, size: 52 %>
<%= link_to user.name, user %>
<%- if @user %>
<%= @user.microposts.count %>
<%- else %>
THIS IS THE ERROR, THERE IS NO USER ON @user
<%- end %>
<% if current_user.admin? && !current_user?(user) %>
| <%= link_to "delete", user, method: :delete, confirm: "You sure?" %>
<% end %>
</li>
这就是错误所在,@USER上没有用户
|
导致此错误的原因是\@USER上没有用户。这意味着根据rorra的评论,\@user不存在,那么我应该在哪里解决这个问题
class UsersController < ApplicationController
before_filter :signed_in_user,
only: [:index, :edit, :update, :destroy, :following, :followers]
before_filter :correct_user, only: [:edit, :update]
before_filter :admin_user, only: :destroy
def index
@users = User.paginate(page: params[:page])
end
def show
@user = User.find(params[:id])
@microposts = @user.microposts.paginate(page: params[:page])
end
def new
@user = User.new
end
def create
@user = User.new(params[:user])
if @user.save
sign_in @user
flash[:success] = "Welcome to Sample App!"
redirect_to root_url
else
render 'new'
end
end
def edit
end
def update
if @user.update_attributes(params[:user])
sign_in @user
flash[:success] = "Profile updated"
redirect_to @user
else
render 'edit'
end
end
def destroy
User.find(params[:id]).destroy
flash[:success] = "User destroyed"
redirect_to users_path
end
private
def correct_user
@user = User.find(params[:id])
redirect_to root_path unless current_user?(@user)
end
def admin_user
redirect_to root_path unless current_user.admin?
end
end
class UsersController
以下是views\users\index.html.erb
<% provide(:title, 'Users') %>
<h1>Users</h1>
<%= will_paginate %>
<ul class="users">
<%= render @users %>
</ul>
<%= will_paginate %>
使用者
下面是views\users\show.html.erb
<% provide(:title, @user.name) %>
<div class="row">
<aside class="span4">
<section>
<h1>
<%= gravatar_for @user %>
<%= @user.name %>
</h1>
</section>
<section>
<%= render 'shared/stats' %>
</section>
<br>
</aside>
<div class="span10">
<%= render 'follow_form' if signed_in? %>
<% if @user.microposts.empty? %>
<h3>Microposts (<%= @user.microposts.count %>)</h3>
<% end %>
<% if @user.microposts.any? %>
<h3>Microposts (<%= @user.microposts.count %>)</h3>
<ol class="microposts">
<%= render @microposts %>
</ol>
<%= will_paginate @microposts %>
<% end %>
</div>
</div>
微孔()
微孔()
使用以下代码更新部分(\views\users\\u user.html.erb):
<%- if @user %>
<%= @user.microposts.count %>
<%- else %>
THIS IS THE ERROR, THERE IS NO USER ON @user
<%- end %>
是的,用户模型和Micropost模型有关联吗?我对RoR很陌生。你能进一步解释一下怎么做吗?这是用户模型的开始,它有微操作。class User
<%= user.microposts.count %>
<%= render partial: '/views/users/user', object: @my_user %>
<%= render @user %>
<%= render partial: '/views/users/user', collection: @users %>
<li>
<%= gravatar_for user, size: 52 %>
<%= link_to user.name, user %>
<%= user.microposts.count %>
<% if current_user.admin? && !current_user?(user) %>
| <%= link_to "delete", user, method: :delete, confirm: "You sure?" %>
<% end %>
</li>
<%= render @users %>
@users = User.paginate(page: params[:page]).all