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Informations about the package yii2-many-to-many

Yii 2 Many-to-many

Implementation of Many-to-many relationship for Yii 2 framework.

Latest Stable Version Total Downloads Latest Unstable Version License

Installation

The preferred way to install this extension is through composer.

Either run

or add

to the require section of your composer.json file.

Features

Creating editable attribute

Simply add public property to your ActiveRecord model like this:

It will store primary keys of related records during update.

Attaching and configuring behavior

First way is to explicitly specify all parameters:

But more often we also need to display related models, so it's better to define relation for that and use it for both display and behavior configuration. Both ways ( and ) are considered valid:

Using :

Using (requires additional model for junction table):

Order is not required.

Then just pass the name of this relation and all other parameters will be fetched automatically.

Additional many-to-many relations can be added exactly the same. Note that even for one relation you should declare it as a part of relations section.

Filling relations

By default, editableAttribute of each found model will be populated with ids of related models (eager loading is used). If you want more manual control, prevent extra queries, disable autoFill option:

and fill it only when it's needed, for example in update action of controller. This is recommended way of using.

Alternatively you can specify conditions of filling in closure:

Even it's possible to do something like this:

but it's not recommended for usage because model is not appropriate place for handling routes.

Saving relations without massive assignment

When creating model:

When updating model ('autoFill' => true):

When updating model ('autoFill' => false, manual filling):

When updating model ('autoFill' => false, without manual filling):

In this case many-to-many relations will stay untouched.

Adding attribute as safe

Add editable attribute to model rules for massive assignment.

Either mark it as safe at least:

Or use custom validator:

Validator checks list for being array and containing only primary keys presented in related model. It can not be used without attaching ManyToManyBehavior.

Adding control to view

Add control to view for managing related list. Without extensions it can be done with multiple select:

Example of getList() method contents (it needs to be placed in User model):

Relation features

You can access many-to-many relation like so:

users can be value of either name or table relation property specified in config.

You can fill editableAttribute with ids of related records like so:

You can get added and deleted primary keys of related models for specific relation like so:

Note that they are only available after the model was saved so you can access it after $model->save() call or in afterSave() event handler.

Running tests

Install dependencies:

Add database config (tests/config/db-local.php file) with following contents:

You can change dbname, username and password how you want. Make sure create database and user before running tests.

Run tests:


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