In todays video we will be building a fully functioning and dynamic app that implements some advanced pagination. I will be using React, Express and MongoDB for this project. Pagination is a important topic in web development as it improves websites loading time as well as overall user experience. So i made a video for you guys covering everything you need to know.
0:00:00 Intro & Demo
0:02:07 Project Folder Setup
0:09:16 Backend Part of Project
0:34:58 Backend Pagination
0:45:26 Frontend Part of Project
1:10:11 Frontend Pagination
1:32:24 Last touches and demo
In this post I will show you pagination example in laravel, as we all know pagination is very common feature in all websites, if we want to display specific number of details or images then we can use pagination.
aravel provide paginate method and it will automatically takes care of setting the proper limit and offset based on the current page being viewed by the user.here i will show you how to use pagination in laravel, So I have try paginate method in laravel.
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This project is based on the need for a private message system for ging / social_stream. Instead of creating our core message system heavily dependent on our development, we are trying to implement a generic and potent messaging gem.
After looking for a good gem to use we noticed the lack of messaging gems and functionality in them. Mailboxer tries to fill this void delivering a powerful and flexible message system. It supports the use of conversations with two or more participants, sending notifications to recipients (intended to be used as system notifications “Your picture has new comments”, “John Doe has updated his document”, etc.), and emailing the messageable model (if configured to do so). It has a complete implementation of a
Mailbox object for each messageable with
The gem is constantly growing and improving its functionality. As it is used with our parallel development ging / social_stream we are finding and fixing bugs continously. If you want some functionality not supported yet or marked as TODO, you can create an issue to ask for it. It will be great feedback for us, and we will know what you may find useful in the gem.
Mailboxer was born from the great, but outdated, code from lpsergi / acts_as_messageable.
We are now working to make exhaustive documentation and some wiki pages in order to make it even easier to use the gem to its full potential. Please, give us some time if you find something missing or ask for it. You can also find us on the Gitter room for this repo. Join us there to talk.
Add to your Gemfile:
$ bundle install
Run install script:
$ rails g mailboxer:install
And don't forget to migrate your database:
$ rake db:migrate
You can also generate email views:
$ rails g mailboxer:views
If upgrading from 0.11.0 to 0.12.0, run the following generators:
$ rails generate mailboxer:namespacing_compatibility $ rails generate mailboxer:install -s
Then, migrate your database:
$ rake db:migrate
We are now adding support for sending emails when a Notification or a Message is sent to one or more recipients. You should modify the mailboxer initializer (/config/initializer/mailboxer.rb) to edit these settings:
Mailboxer.setup do |config| #Enables or disables email sending for Notifications and Messages config.uses_emails = true #Configures the default `from` address for the email sent for Messages and Notifications of Mailboxer config.default_from = "email@example.com" ... end
You can change the way in which emails are delivered by specifying a custom implementation of notification and message mailers:
Mailboxer.setup do |config| config.notification_mailer = CustomNotificationMailer config.message_mailer = CustomMessageMailer ... end
If you have subclassed the Mailboxer::Notification class, you can specify the mailers using a member method:
class NewDocumentNotification < Mailboxer::Notification def mailer_class NewDocumentNotificationMailer end end class NewCommentNotification < Mailboxer::Notification def mailer_class NewDocumentNotificationMailer end end
Otherwise, the mailer class will be determined by appending 'Mailer' to the mailable class name.
Users must have an identity defined by a
name and an
#Returning any kind of identification you want for the model def name return "You should add method :name in your Messageable model" end
#Returning the email address of the model if an email should be sent for this object (Message or Notification). #If no mail has to be sent, return nil. def mailboxer_email(object) #Check if an email should be sent for that object #if true return "define_email@on_your.model" #if false #return nil end
These names are explicit enough to avoid colliding with other methods, but as long as you need to change them you can do it by using mailboxer initializer (/config/initializer/mailboxer.rb). Just add or uncomment the following lines:
Mailboxer.setup do |config| # ... #Configures the methods needed by mailboxer config.email_method = :mailboxer_email config.name_method = :name config.notify_method = :notify # ... end
You may change whatever you want or need. For example:
config.email_method = :notification_email config.name_method = :display_name config.notify_method = :notify_mailboxer
Will use the method
notification_email(object) instead of
Using default or custom method names, if your model doesn't implement them, Mailboxer will use dummy methods so as to notify you of missing methods rather than crashing.
In your model:
class User < ActiveRecord::Base acts_as_messageable end
You are not limited to the User model. You can use Mailboxer in any other model and use it in several different models. If you have ducks and cylons in your application and you want to exchange messages as if they were the same, just add
acts_as_messageable to each one and you will be able to send duck-duck, duck-cylon, cylon-duck and cylon-cylon messages. Of course, you can extend it for as many classes as you need.
class Duck < ActiveRecord::Base acts_as_messageable end
class Cylon < ActiveRecord::Base acts_as_messageable end
Version 0.8.0 sees
Messageable#unread renamed to
is_(un)read. This may break existing applications, but
read is a reserved name for Active Record, and the best pratice in this case is simply avoid using it.
#alfa wants to send a message to beta alfa.send_message(beta, "Body", "subject")
As a messageable, what you receive are receipts, which are associated with the message itself. You should retrieve your receipts for the conversation and get the message associated with them.
This is done this way because receipts save the information about the relation between messageable and the messages: is it read?, is it trashed?, etc.
#alfa gets the last conversation (chronologically, the first in the inbox) conversation = alfa.mailbox.inbox.first #alfa gets it receipts chronologically ordered. receipts = conversation.receipts_for alfa #using the receipts (i.e. in the view) receipts.each do |receipt| ... message = receipt.message read = receipt.is_unread? #or message.is_unread?(alfa) ... end
#alfa wants to reply to all in a conversation #using a receipt alfa.reply_to_all(receipt, "Reply body") #using a conversation alfa.reply_to_conversation(conversation, "Reply body")
#alfa wants to reply to the sender of a message (and ONLY the sender) #using a receipt alfa.reply_to_sender(receipt, "Reply body")
#delete conversations forever for one receipt (still in database) receipt.mark_as_deleted #you can mark conversation as deleted for one participant conversation.mark_as_deleted participant #Mark the object as deleted for messageable #Object can be: #* A Receipt #* A Conversation #* A Notification #* A Message #* An array with any of them alfa.mark_as_deleted conversation # get available message for specific user conversation.messages_for(alfa)
#alfa wants to retrieve all his conversations alfa.mailbox.conversations #A wants to retrieve his inbox alfa.mailbox.inbox #A wants to retrieve his sent conversations alfa.mailbox.sentbox #alfa wants to retrieve his trashed conversations alfa.mailbox.trash
You can use Kaminari to paginate the conversations as normal. Please, make sure you use the last version as mailboxer uses
select('DISTINCT conversations.*') which was not respected before Kaminari 0.12.4 according to its changelog. Working correctly on Kaminari 0.13.0.
#Paginating all conversations using :page parameter and 9 per page conversations = alfa.mailbox.conversations.page(params[:page]).per(9) #Paginating received conversations using :page parameter and 9 per page conversations = alfa.mailbox.inbox.page(params[:page]).per(9) #Paginating sent conversations using :page parameter and 9 per page conversations = alfa.mailbox.sentbox.page(params[:page]).per(9) #Paginating trashed conversations using :page parameter and 9 per page conversations = alfa.mailbox.trash.page(params[:page]).per(9)
You can take a look at the full documentation for Mailboxer in rubydoc.info.
If you need a GUI you should take a look at these links:
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