ViewComponents\EloquentDataProcessing

Eloquent ORM support for ViewComponents

Table of Contents

• Requirements
• Installation
• Usage
• Contributing
• Testing
• Security
• License

Requirements

• PHP 5.5+ (hhvm & php7 are supported)

Installation

The recommended way of installing the component is through Composer.

Run following command:

composer require view-components/eloquent-data-processing

Usage

Creating Data Provider

EloquentDataProvider supports 3 types of data sources:

• Illuminate\Database\Eloquent\Builder instance (database query builder created from model)
• Illuminate\Database\Query\Builder instance (standard database query builder, don't know about models)
• Class name of Eloquent model

Using Class Name of Eloquent Model as Data Source

use MyApp\UserModel;
use ViewComponents\Eloquent\EloquentDataProvider;
$provider = new EloquentDataProvider(UserModel::class);

If you use class name of Eloquent model as data source, the only way to modify database query is specifying data provider operations:

use ViewComponents\ViewComponents\Data\Operation\FilterOperation;

$provider->operations()->add(
    new FilterOperation('role', FilterOperation::OPERATOR_EQ, 'Manager')
);

Using Illuminate\Database\Eloquent\Builder as Data Source

use ViewComponents\Eloquent\EloquentDataProvider;

$provider = new EloquentDataProvider((new MyApp\UserModel)->newQuery());

It's possible to specify query parts before creating EloquentDataProvider but note that some parts of query may be changed by data provider operations.

use ViewComponents\Eloquent\EloquentDataProvider;

$query = MyApp\UserModel
            ::where('role', '=', 'Manager')
            ->where('company', '=', 'Facebook')
            ->orderBy('id');

$provider = new EloquentDataProvider($query);

Using Illuminate\Database\Query\Builder as Data Source

It's possible to use EloquentDataProvider if you not deal with Eloquent models.

use DB;
use ViewComponents\Eloquent\EloquentDataProvider;

$provider = new EloquentDataProvider(
    DB::table('users')->where('name', '=', 'David')
);

Data Provider Operations

Eloquent Data provider modifies database query when it has operations.

Use operations() method for accessing operations collection.

Documentation related to collections can be found here.

Example of adding operation:

$provider
    ->operations()
    ->add(new SortOperation('id', SortOperation::ASC));

Also operations can be specified on data provider creation:

use MyApp\UserModel;
use ViewComponents\Eloquent\EloquentDataProvider;
use ViewComponents\ViewComponents\Data\Operation\FilterOperation;

$provider = new EloquentDataProvider(
    UserModel::class
    [
        new FilterOperation('role', FilterOperation::OPERATOR_EQ, 'Manager')
        new SortOperation('id', SortOperation::DESC),
    ]
);

Extracting data

Data providers implements IteratorAggregate interface, so you can iterate it like array:

use MyApp\UserModel;
use ViewComponents\Eloquent\EloquentDataProvider;

$provider = new EloquentDataProvider(UserModel::class);
foreach ($provider as $user) {
   var_dump($user); // instance of UserModel
}

Data provider executes DB query when getIterator() method is called or when iteration begins in case if data is not loaded yet, i. e. calling getIterator() twice will not produce 2 database queries. But changing operations collection will cause resetting cache:

use MyApp\UserModel;
use ViewComponents\Eloquent\EloquentDataProvider;
use ViewComponents\ViewComponents\Data\Operation\FilterOperation;

$provider = new EloquentDataProvider(UserModel::class);
// databse query will be executed 
$provider->getIterator();

// databse query will not be executed again, iterating over same data 
$provider->getIterator();

$provider->operations->add(
  new FilterOperation('id', FilterOperation::OPERATOR_LTE, 5)
)
// databse query will be executed again
$provider->getIterator();

Contributing

Please see Contributing Guidelines and Code of Conduct for details.

Testing

This package bundled with unit tests (PHPUnit).

To run tests locally, you must install this package as stand-alone project with dev-dependencies:

composer create-project view-components/eloquent-data-processing

Command for running tests:

composer test

Security

If you discover any security related issues, please email [email protected] instead of using the issue tracker.

License

© 2015 — 2016 Vitalii Stepanenko

Licensed under the MIT License.

Please see License File for more information.