README

This package provides methods to conveniently convert PHP classes to array data prepared for use on the frontend Vue component, Vue Multiselect (2.4.1).

Please note this utility package is independent of and not endorsed by https://vue-multiselect.js.org/.

Table of Contents:

1. Installation
   • 1.1. Laravel
2. The Multiselectable Trait
   • 2.1. toMultiselectOption()
3. Eloquent Collection Methods
   • 3.1. multiselect()
   • 3.2. disbaleOptionsBy()
4. Eloquent Query Builder Methods
   • 4.1. multiselect()

# 1. Installation

Install using Composer:

$ composer require zachgilbert/vue-multiselect

Apply the trait Multiselectable to any PHP object (such as an Eloquent model, in Laravel) that you wish to convert to an option for use on the <vue-multiselect /> Vue component:

<?php

use ZachGilbert\VueMultiselectable\Traits\Multiselectable;

class User
{
    use Multiselectable;

    // ...
}

# 1.1. Laravel

To extend Eloquent collections in laravel, be sure to register the following provider in config/app.php:

<?php

return [
    // ...

    'providers' => [
        // ...

		\ZachGilbert\VueMultiselectable\Laravel\Providers\MultiselectProvider::class,
    ],
];

# 2. The Multiselectable Trait

# 2.1. toMultiselectOption()

The toMultiselectOption() method converts any given class instance to an option formatted for use on the <vue-multiselect /> Vue component.

toMultiselectOption() accepts five arguments: $trackByAttribute, $labelAttribute, $trackByKey, $labelKey, and $isDisabled.

• $trackByAttribute and $labelAttribute are the attributes on the class that should be used for the value and the label on the multiselect option:

   <?php
   $user->toMultiselectOption('id', 'name');
   // ['value' => 1, 'name' => 'John McEnroe']

  Note that $trackByAttribute is the only required argument. Provided on its own, ->toMultiselectOption() will just return the attribute value:

   <?php
   $user->toMultiselectOption('name');
   // 'John McEnroe'

• $trackByKey and $labelKey set how the attributes should be keyed:

   <?php
   $user->toMultiselectOption('id', 'name', 'user_id', 'user_name');
   // ['user_id' => 1, 'user_name' => 'John McEnroe']

• $isDisabled, if provided, will set a key with a boolean value for whether the option should be disabled:

   <?php
   $user->toMultiselectOption('id', 'name', 'value', 'label', true);
   // ['value' => 1, 'name' => 'John McEnroe', '$isDisabled' => true]

# 3. Eloquent Collection Methods

In Larvel, collections of PHP objects that use the Multiselectable trait can be easily converted to a JSON-serializable array of options.

Make sure to register the provider MultiselectProvider in config/app.php).

# 3.1. multiselect()

The multiselect() method converts each item in the collection to an array of options.

multiselect() accepts four arguments: $trackByAttribute, $labelAttribute, $trackByKey, and $labelKey:

• $trackByAttribute and $labelAttribute are the attributes on each item in the collection that should be used for the value and the label on the multiselect option:

   <?php
   $collection->multiselect('id', 'name')->toJson();
   // '[{"value": 1, "name": "John McEnroe"}, {"value": 2, "name": "Dr Eggman"}]''

  Note that if only the first argument is provided, the resultant collection will be an array of that attribute's values:

   <?php
   $collection->multiselect('name')->toJson();
   // '["John McEnroe", "Dr Eggman"]'

• By default, the Vue multiselect component assumes the value and label on each option will be keyed by 'value' and 'label'. Using $trackByKey and $labelKey can set how the attributes should be keyed:

   <?php
   $collection->multiselect('id', 'name', 'user_id', 'user_name')->toJson();
   // '[{"user_id": 1, "user_name": "John McEnroe"}, {"user_id": 2, 	"user_name": "Dr Eggman"}]'

# 3.2. disbaleOptionsBy()

The disableOptionsBy() method disables options for the multiselect based on a callback (the return value of which is evaluated as true or false). Any items that pass the truth test will have $isDisabled = true set; any items that fail will have $isDisabled = false set.

<?php

$options = $collection->disableOptionsBy(function ($item, $key) {
    return strpos($item->name, 'John') === 0;
});

$options->multiselect('id', 'name')->toJson();

// '[{"value": 1, "label": "John McEnroe", "$isDisabled": true}, {"value": 2, "label": "Dr Eggman"}]'

Note that disabling multiselect options is only applicable to options which can be converted to objects in JSON (i.e. arrays).

# 4. Eloquent Query Builder Methods

Using Laravel's Eloquent query builder, we can obtain database records in a multiselect-ready format. Note this does not require any classes using the Multiselectable trait.

# 4.1. multiselect()

The multiselect() method selects two columns, with aliases, ready for use on the multiselect component. It accepts four arguments: $trackBySelect, $labelSelect, $trackByAlias, and $labelAlias:

• $trackBySelect and $labelSelect are the raw SQL columns/statements to select, that should be used for the value and the label on the multiselect:

   <?php
  
   $users = User::query()
       ->multiselect('users.id', 'CONCAT(users.name, " - ", companies.name)')
       ->join('companies', 'users.company_id', '=', 'companies.id');
  
   // SELECT `users`.`id` AS `value`, CONCAT(`users`.name`, " - ", `companies`.`name`) AS `label`
   // ...
  
   $users->get()->toJson();
  
   // '[{"value": "1", "label": "John McEnroe - Tennis Co."}]'

• $trackByAlias and $labelAlias set the column names for the selects:

   <?php
  
   $users = User::query()
       ->multiselect(
           'users.id', 'CONCAT(users.name, " - ", companies.name)',    'employee_id', 'employee_name'
       )
       ->join('companies', 'users.company_id', '=', 'companies.id');
  
   // SELECT `users`.`id` AS `employee_id`, CONCAT(`users`.name`, " - ", `companies`.`name`) AS `employee_name`
   // ...
  
   $users->get()->toJson();
  
   // '[{"employee_id": 1, "employee_name": "John McEnroe - Tennis Co."}]'