从Rails应用程序中的ruby中所有用户的索引中保留当前用户

Question

I am working away at one of my first Ruby on Rails CRUD type apps.

It is an Instagram like application with users accounts (Devise) and pictures uploaded and owned by users.

I would like to create an index of users, a Discover Other Users feature. I have done this, but the output includes the currently logged in User. I wish to omit the current user from the index of users under Discover Other Users.

User Controller Code with the code I tried, unsuccessfully, commented out.

 class UsersController < ApplicationController def show @user = User.find(params[:id]) end def new end def index @users = User.all #@users = User.where("user_id != ?", current_user.id) end end 

User View Code

 <div class="booyah-box col-xs-6 col-xs-offset-3"> <% @users.each do |user| %> <%= link_to public_profile_path(user) do %> <%= image_tag user.avatar, :class => "smallPlate" %> <% end %> <% end %> </div> 

and the Error

 ActiveRecord::StatementInvalid in Users#index Showing /vagrant/src/platewarz/app/views/users/index.html.erb where line #2 raised: PG::UndefinedColumn: ERROR: column "user_id" does not exist LINE 1: SELECT "users".* FROM "users" WHERE (user_id != 9) ^ : SELECT "users".* FROM "users" WHERE (user_id != 9) Extracted source (around line #2): 1 2 3 4 5 <div class="booyah-box col-xs-6 col-xs-offset-3"> <% @users.each do |user| %> <%= link_to public_profile_path(user) do %> <%= image_tag user.avatar, :class => "smallPlate" %> <% end %> Rails.root: /vagrant/src/platewarz Application Trace | Framework Trace | Full Trace app/views/users/index.html.erb:2:in `_app_views_users_index_html_erb___484529272__626771048' 

Answer 1

If you are using Rails 4:

@users = User.where.not(id: current_user.id)

else

 @users = User.where('id != ?', current_user.id)

Something off the topic:

Better create a scope in your 
  #user.rb: 
   scope :all_except_current, ->(user) { where.not(id: user) }

 #now use this scope in your controller & get all your users except current_uesr 
 def index 
   @users = User.all_except_current(current_user)  
 end