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Ruby Building Social Features in Ruby on Rails Using AJAX Implementing AJAX: Part 3

ddd ddd
ddd ddd
56 Points

Browser won't display 'edit relationship' button. Totally stuck!

I'm not sure what the problem is here to know what exactly I'm asking but I'll give it my best shot. I've been following these videos for ages and it's all gone smoothly until now.

I'm working with ajax for the first time. In the app a user(1) searches for user(2), upon finding user(2) user(1) can click a button 'add relationship' which sends a relationship request to user(2). the button 'add relationship' should change to 'relationship requested' straight away and then upon refreshing the page, the button should change to 'edit relationship'.

'add relationship' = no relationship exists yet 'relationship requested' = pending relationship exists, acts like a success flash message 'edit relationship' = pending relationship exists or accepted relationship exists

It's all working except the last part where the button should change to 'edit relationship' upon refreshing the browser page. 'add relationship' appears instead

Any ideas this 'edit relationship' button wont appear? I am using state machine, draper and js-routes gems.


where upon searching for user(2) their name appears and the button to 'add relationship', 'edit relationship' or 'relationship requested' buttons appear next to the name

the if statement here is what's not working I think. Why isn't it finding the relationship based on if it is pending or accepted?

<% if logged_in? %>
        <% @users.each do |user| %>
                <%= user.name %>
                <div id="relationship-status">
                    <% if current_user.following.include?(user.id) || current_user.pending_following.include?(user.id) %>
                        <%= link_to "Edit Relationship", edit_relationship_path(followed_id: user.id), class: "btn btn-primary" %>
                    <% else %>
                        <%= link_to "Add Relationship", new_relationship_path(followed_id: user.id), class: "btn btn-primary", id: 'add-relationship', data: { followed_id: user.id.to_param } %>
                    <% end %>
        <% end %>
<% end %>   


  def index
    @users = User.search(params[:search])


$(document).ready(function() {

    $('#add-relationship').click(function(event) {
        var addRelationshipBtn = $(this);
            url: Routes.relationships_path({relationship: { followed_id: addRelationshipBtn.data('followedId') }}),
            dataType: 'json', 
            type: 'POST', 
            success: function(e) {
                $('#relationship-status').html("<a href='#' class='btn btn-success'>Relationship Requested</a>");


class User < ActiveRecord::Base
  has_one :profile, dependent: :destroy
  has_many :pending_relationships,  class_name:  "Relationship",
                                    foreign_key: "follower_id"
  has_many :active_relationships,   class_name:  "Relationship",
                                    foreign_key: "follower_id",
                                    dependent:   :destroy
  has_many :passive_relationships,  class_name:  "Relationship",
                                    foreign_key: "followed_id",
                                    dependent:   :destroy                                
  has_many :following, -> { where(relationships: { state: "accepted" } ) }, through: :active_relationships,  source: :followed
  has_many :followers, through: :passive_relationships, source: :follower                              
  has_many :pending_following, -> { where(relationships: { state: "pending" } ) }, through: :pending_relationships,  source: :followed


class RelationshipDecorator < Draper::Decorator

  decorates :relationship

  def relationship_state

  def sub_message
    case model.state
    when 'pending'
      "Relationship request pending"
    when 'accepted'
      "You are now connected with #{model.followed.name}"


class AddStateToRelationships < ActiveRecord::Migration
  def change
    add_column :relationships, :state, :string
    add_index :relationships, :state


class Relationship < ActiveRecord::Base
  belongs_to :follower, class_name: "User"
  belongs_to :followed, class_name: "User"
  validates :follower_id, presence: true
  validates :followed_id, presence: true

  after_destroy :delete_mutual_relationship!

  state_machine :state, initial: :pending do
    after_transition on: :accept, do: [:send_acceptance_email, :accept_mutual_relationship!]

    state :requested

    event :accept do
      transition any => :accepted

terminal output:

Started POST "/relationships?relationship%5Bfollowed_id%5D=25" for at 2014-11-06 16:35:26 +1100
Processing by RelationshipsController#create as JSON
  Parameters: {"relationship"=>{"followed_id"=>"25"}}
  User Load (0.4ms)  SELECT  "users".* FROM "users"  WHERE "users"."id" = 1 LIMIT 1
  User Load (0.3ms)  SELECT  "users".* FROM "users"  WHERE "users"."id" = ? LIMIT 1  [["id", 25]]
   (0.1ms)  begin transaction
  SQL (5.4ms)  INSERT INTO "relationships" ("created_at", "followed_id", "follower_id", "state", "updated_at") VALUES (?, ?, ?, ?, ?)  [["created_at", "2014-11-06 05:35:26.360104"], ["followed_id", 25], ["follower_id", 1], ["state", "pending"], ["updated_at", "2014-11-06 05:35:26.360104"]]
  SQL (0.2ms)  INSERT INTO "relationships" ("created_at", "followed_id", "follower_id", "state", "updated_at") VALUES (?, ?, ?, ?, ?)  [["created_at", "2014-11-06 05:35:26.368921"], ["followed_id", 1], ["follower_id", 25], ["state", "requested"], ["updated_at", "2014-11-06 05:35:26.368921"]]
  Relationship Load (0.1ms)  SELECT  "relationships".* FROM "relationships"  WHERE "relationships"."id" = ? LIMIT 1  [["id", 49]]
  User Load (0.1ms)  SELECT  "users".* FROM "users"  WHERE "users"."id" = ? LIMIT 1  [["id", 1]]
  User Load (0.1ms)  SELECT  "users".* FROM "users"  WHERE "users"."id" = ? LIMIT 1  [["id", 25]]
  Rendered user_mailer/relationship_requested.html.erb (0.2ms)

UserMailer#relationship_requested: processed outbound mail in 27.9ms

Sent mail to example-24@example.com (14.2ms)
Date: Thu, 06 Nov 2014 16:35:26 +1100
From: noreply@example.com
To: example-24@example.com
Message-ID: <545b089e6206e_6c313ff72cf9cf78434189f@example.local.mail>
Subject: Firstname Surname wants to follow you. Please log in to accept
 this request
Mime-Version: 1.0
Content-Type: text/html;
Content-Transfer-Encoding: 7bit

Hi example-24, 

Firstname Surname wants to follow you.

   (7.7ms)  commit transaction
Completed 200 OK in 71ms (Views: 0.3ms | ActiveRecord: 14.4ms)

1 Answer

Can you post your code from user_relationship controller? I think problem is in your edit method, but I have to see it.

Christopher Lovell
Christopher Lovell
1,244 Points

I had a similar issue in the user_relationship controller, it was down to leaving an extra redirect_to call inside respond_to do |format|