Comment module

makes every entity of your application commentable. Features:

• Create, Update, Delete comments with ajax
• Gravatar support
• define multiple models that can be commented
• Events raised on new, update, delete
• more coming soon...

If there is something missing here, or you think one step should be described more detailed, please report it. Thanks!

Requirements

• Tested with Yii 1.1.8, should work in earlier versions
• yii-gravatar extension for gravatar support

Resources

• Found a bug or want a feature? Report it on github
• Code on github
• E-Mail the author: CeBe [mail@cebe.cc](https://github.com/yiiext/comment-module/blob/master/mailto:mail@cebe.cc)
• demo on http://demo.cebe.cc/comment-module

Download

There are two ways to get this extension working:

1. Clone repo:

   • Go to your application baseDir (protected in default yii webapp).
   • git clone https://github.com/yiiext/comment-module.git extensions/comment-module
     • If your project is in a git repository you can alternatively add comment-module as a submodule like this:
     • git submodule add https://github.com/yiiext/comment-module.git protected/extensions/comment-module
   • go to new comment-modules base dir and run git submodule update --init to get the gravatar extension that's included.

2. Download latest release and put all the files into extensions/comment-module under your application baseDir (protected in default yii webapp). To be able to use Gravatar support you have to copy YiiGravatar.php into extensions/comment-module/extensions/gravatar.

Quickstart

Add module to your application config (optional config values are commented):

<?php
    // ...
    'modules'=>array(
        // ...
        'comment'=>array(
            'class'=>'ext.comment-module.CommentModule',
            'commentableModels'=>array(
                // define commentable Models here (key is an alias that must be lower case, value is the model class name)
                'post'=>'Post'
            ),
            // set this to the class name of the model that represents your users
            'userModelClass'=>'User',
            // set this to the username attribute of User model class
            'userNameAttribute'=>'username',
            // set this to the email attribute of User model class
            'userEmailAttribute'=>'email',
            // you can set controller filters that will be added to the comment controller {@see CController::filters()}
//          'controllerFilters'=>array(),
            // you can set accessRules that will be added to the comment controller {@see CController::accessRules()}
//          'controllerAccessRules'=>array(),
            // you can extend comment class and use your extended one, set path alias here
//          'commentModelClass'=>'comment.models.Comment',
        ),
        // ...
    ),
    // ...

Create database tables: You can use the database migration provieded by this extension or create a table (example for mysql):

    CREATE TABLE IF NOT EXISTS `comments` (
      `id`         int(11) UNSIGNED NOT NULL AUTO_INCREMENT,
      `message`    text COLLATE utf8_unicode_ci,
      `userId`     int(11) UNSIGNED DEFAULT NULL,
      `createDate` datetime DEFAULT NULL,
      PRIMARY KEY (`id`),
      KEY `fk_comments_userId` (`userId`)
    ) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;

You might also want to add a foreign key for userId column that references you user tables pk.

Create a database table for every commentable Model relation:

    CREATE TABLE IF NOT EXISTS `posts_comments_nm` (
      `postId`    int(11) UNSIGNED NOT NULL,
      `commentId` int(11) UNSIGNED NOT NULL,
      PRIMARY KEY (`postId`,`commentId`),
      KEY `fk_posts_comments_comments` (`commentId`),
      KEY `fk_posts_comments_posts` (`postId`)
    ) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;

You might want to add foreign keys here too.

Add commentable behavior to all Models you want to be commented.

<?php
    // ...
    public function behaviors() {
        return array(
            'commentable' => array(
                'class' => 'ext.comment-module.behaviors.CommentableBehavior',
                // name of the table created in last step
                'mapTable' => 'posts_comments_nm',
                // name of column to related model id in mapTable
                'mapRelatedColumn' => 'postId'
            ),
       );
    }

Finally add comments to your view template of the commentable model:

<h1>comments</h1>

<?php $this->renderPartial('comment.views.comment.commentList', array(
    'model'=>$model
)); ?>

Extending Comment-Module

Comment module raises events to which you can attach event handlers to handle them. See The Definitive Guide to Yii on how to do this.

You can also attach behaviors to CommentModule by setting 'behaviors'=>array(/* ... */) in the module config described above. See CModule::behaviors on how to add behaviors to a module.

onNewComment

This event is raised when a new comment has been saved. The following attributes are available on the $event given as the first parameter to the event handler:

• $event->comment is the ActiveRecord instance of the currently added comment.
• $event->commentedModel is the model the comment was added to.

Possible use cases:

• Send an E-Mail-Notification

onUpdateComment

This event is raised when a user edited a comment. The following attributes are available on the $event given as the first parameter to the event handler:

• $event->comment is the ActiveRecord instance of the updated comment.

onDeleteComment

This event is raised when a user deleted a comment. The following attributes are available on the $event given as the first parameter to the event handler:

• $event->comment is the ActiveRecord instance of the deleted comment.