CODEWITHSUNDEEP
ruby-on-railsnotificationsmessage
Sasha
Sasha

Reputation: 3281

how to send a notification a user received a private message

i created a messaging model where a user can send a private message to another user. however im not sure how to go about notifying the user he/she got a new message. does anyone have a way to go about doing this? or if there was a simple solution?

    def create
       @message = current_user.messages.build
       @message.to_id = params[:message][:to_id]
       @message.user_id = current_user.id
       @message.content = params[:message][:content]
       if @message.save
          flash[:success ] = "Private Message Sent"
       end
       redirect_to user_path(params[:message][:to_id])
    end

i can tell the sender that a private message was sent, but im not sure how i can notify the receiver a new private message was created.

help would be appreciated. thanks = )

Upvotes: 3

Views: 2365

Answers (2)

Erik Escobedo
Erik Escobedo

Reputation: 2803

First, you can improve your controller like this:

def create
  @message = current_user.messages.new(params[:message])

  if @message.save
    flash[:message] = "Private Message Sent"
  end
  redirect_to user_path(@message.to_id)
end

Then, in your models:

# app/models/message.rb
class Message < ActiveRecord::Base
  belongs_to :user
  belongs_to :recipient, class_name: 'User', foreign_key: :to_id
  has_many :notifications, as: :event

  after_create :send_notification

private
  def send_notification(message)
    message.notifications.create(user: message.recipient)
  end
end

# app/models/user.rb
class User < ActiveRecord::Base
  has_many :messages
  has_many :messages_received, class_name: 'Message', foreign_key: :to_id
  has_many :notifications
end

# app/models/notification.rb
class Notification < ActiveRecord::Base
  belongs_to :user
  belongs_to :event, polymorphic: true
end

This Notification model allows you to store a user's notifications for different "events". You can even store whether a notification has been read or not, or set an after_create callback in order to send an email to the notified user.

The migration for this Notification model would be:

# db/migrate/create_notifications.rb
class CreateNotifications < ActiveRecord::Migration
  def self.up
    create_table :notifications do |t|
      t.integer :user_id
      t.string  :event_type
      t.string  :event_id
      t.boolean :read, default: false

      t.timestamps
    end
  end

  def self.down
    drop_table :notifications
  end
end

You can read about the Rails associations options here.

Upvotes: 4

Andrew Gorcester
Andrew Gorcester

Reputation: 19983

There are any number of ways to notify the recipient. You could have a worker process that sends out email notifications, or include an "inbox" on your site that shows how many messages someone has waiting.

You could also show a "flash" message to the recipient. You would do this by for instance including on a base template some code to check if there are any unread messages that have not had a notification delivered yet; if there aren't, nothing happens, and if there are, then a notification is displayed and the fact that the notif was displayed is recorded so that it won't be displayed a second time.

Upvotes: 1

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