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编辑1：当我检查unfollow提交按钮的元素并将url末尾的变量更改为一个我知道是一个关系行ID它会删除正确的行但后来告诉我，找不到具有该ID的用户将我重定向到。所以我认为它是发送用户id到destroy方法，如果没有该id的行存在会引发错误，或者如果退出时删除错误的关系。然后它使用相同的变量将您重新路由回您正在查看的用户配置文件。无法删除特定表中的特定行
edit2：通过向视图中的form_tag添加（@关系）已解决了取消关注部分。现在关系控制器'redirect_to user_path params [：id]'中的重定向正在寻找用户控制器中的索引方法，因为我想我希望它查找show方法，所以我现在想要找出那部分
我正在关注rails教程并遇到问题。从评论的教程代码是错误的，所以我想知道如果有人在这里可以指向我的解决方案，所以我可以继续本教程的其余部分
我有用户谁可以创建帖子（ribbits）。用户可以关注其他用户。我正在尝试使用取消关注功能。有一个关系表，其中包含字段id，follower_id，followed_id和时间戳。
关系创建方法工作正常，所有字段正确填充。当我点击取消关注我收到以下错误
的ActiveRecord :: RecordNotFound在RelationshipsController＃破坏 无法找到ID关系= 2
它指向这个代码从relationships_controller行::销毁方法
@relationship = Relationship.find(params[:id])
我不确定params [：id]是来自它还是为什么它被使用。从我可以告诉跟随者的用户ID被传递给destroy方法没有实际关系ID
这里是代码的其余部分
relationshipsController
class RelationshipsController < ApplicationController
def create
@relationship = Relationship.new
@relationship.followed_id = params[:followed_id]
@relationship.follower_id = current_user.id
if @relationship.save
redirect_to User.find params[:followed_id]
else
flash[:error] = "Couldn't Follow"
redirect_to root_url
end
end
def destroy
@relationship = Relationship.find(params[:id])
@relationship.destroy
redirect_to user_path params[:id]
end
end
用户模型
class User < ActiveRecord::Base
before_save :create_avatar_url
has_secure_password
has_many :ribbits
has_many :follower_relationships, class_name: "Relationship", foreign_key: "followed_id"
has_many :followed_relationships, class_name: "Relationship", foreign_key: "follower_id"
has_many :followers, through: :follower_relationships
has_many :followeds, through: :followed_relationships
validates :name, presence: true
validates :username, uniqueness: true, presence: true
validates :email, uniqueness: true, presence: true, format: { with: /\A[\w.+-][email protected]([\w]+.)+\w+\z/ }
before_validation :prep_email
def create_avatar_url
self.avatar_url = "http://www.gravatar.com/avatar/#{Digest::MD5.hexdigest(self.email)}?s=50"
end
def following? user
self.followeds.include? user
end
def follow user
Relationship.create follower_id: self.id, followed_id: user.id
end
private
def prep_email
self.email = self.email.strip.downcase if self.email
end
end
用户控制器
class UsersController < ApplicationController
def new
@user = User.new
end
def create
@user = User.new(user_params)
if @user.save
session[:user_id] = @user.id
redirect_to @user, notice: "Thank you for signing up for Ribbit!"
else
render 'new'
end
end
def show
@user = User.find(params[:id])
@ribbit = Ribbit.new
@relationship = Relationship.where(
follower_id: current_user.id,
followed_id: @user.id
).first_or_initialize if current_user
end
private
def user_params
params.require(:user)
.permit(:avatar_url, :email, :name, :password, :password_confirmation, :username)
end
end
show.html.erb
<% if current_user %>
<div id="createRibbit" class="panel right">
<h1>Create a Ribbit</h1>
<p>
<%= form_for @ribbit do |f| %>
<%= f.text_area :content, class: 'ribbitText' %>
<%= f.submit "Ribbit!" %>
<% end %>
</p>
</div>
<% end %>
<div id="ribbits" class="panel left">
<h1>Your Ribbit Profile</h1>
<div class="ribbitWrapper">
<img class="avatar" src="<%= @user.avatar_url %>">
<span class="name"><%= @user.name %></span> @<%= @user.username %>
<p>
<%= @user.ribbits.size %> Ribbits
<span class="spacing"><%= @user.followers.count %> Followers</span>
<span class="spacing"><%= @user.followeds.count %> Following</span>
</p>
<% if current_user and @user != current_user %>
<% if current_user.following? @user %>
<%= form_tag relationship_path, method: :delete do %>
<%= submit_tag "Unfollow" %>
<% end %>
<% else %>
<%= form_for @relationship do %>
<%= hidden_field_tag :followed_id, @user.id %>
<%= submit_tag "Follow" %>
<% end %>
<% end %>
<% end %>
</div>
</div>
<div class="panel left">
<h1>Your Ribbits</h1>
<% @user.ribbits.each do |ribbit| %>
<div class="ribbitWrapper">
<img class="avatar" src="<%= @user.avatar_url %>">
<span class="name"><%= @user.name %></span>
@<%= @user.username %>
<span class="time"><%= time_ago_in_words(ribbit.created_at) %></span>
<p> <%= ribbit.content %> </p>
</div>
<% end %>
</div>
感谢这大多解决了这个问题，但是当这部分'redirect_to user_path params [：followed_id]'重定向时，它会查找索引方法，当我想让它查找show方法时 – Ir1sh