Many To Many (many-2-many) implementation for Yii PHP Framework 2

Overview

Many2ManyBehavior is a Yii PHP Framework 2 behavior that facilitates managing many-2-many relationships between models. It automatically handles the insertion, update, and deletion of related models.

Installation

The preferred way to install this extension is through composer.

Either run

composer require thtmorais/yii2-many-2-many "*"

or add

"thtmorais/yii2-many-2-many": "*"

to the require section of your composer.json file.

Usage

Attach Many2ManyBehavior to your model:

use thtmorais\many2many\Many2ManyBehavior;

class Model extends \yii\db\ActiveRecord
{
    public function behaviors()
    {
        return [
            [
                'class' => Many2ManyBehavior::class,
                'id' => 'id',
                'attribute' => 'relations',
                'relatedModel' => RelatedModel::class,
                'relatedModelId' => 'id',
                'relatedModelAttribute' => 'model_id',
                'relatedModelValidate' => true
            ],
        ];
    }
}

Properties

Property	Type	Description
id	string	Primary key of the source model. Defaults to 'id'.
attribute	string	Attribute containing the relationships to be saved.
relatedModel	string	Class name of the related model.
relatedModelId	string	Primary key of the related model. Defaults to 'id'.
relatedModelAttribute	string	Foreign key in the related model referencing the source model.
relatedModelValidate	bool	Whether to validate the related model before saving. Defaults to true.

Events Handled

• EVENT_AFTER_INSERT: Saves related models after the source model is inserted.
• EVENT_AFTER_UPDATE: Updates related models when the source model is updated.
• EVENT_AFTER_DELETE: Deletes related models when the source model is deleted.

Methods

afterInsert()

Handles the insertion of related models when the source model is inserted.

afterUpdate()

Handles the update of related models when the source model is updated.

afterDelete()

Deletes related models when the source model is deleted.

Example Usage

$model = new Model();

$model->relations = [
    ['id' => 1, 'name' => 'Item 1'],
    ['id' => 2, 'name' => 'Item 2']
];

$model->save();