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Laravel 5 - Repositories to abstract the database layer

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Laravel 5 Repositories

Laravel 5 Repositories is used to abstract the data layer, making our application more flexible to maintain.

Latest Stable Version Total Downloads Latest Unstable Version License Analytics Code Climate

See versions: 1.0.* / 2.0.*

Migrate to: 2.0 / 2.1

You want to know a little more about the Repository pattern? Read this great article.

Table of Contents

Installation

Composer

Execute the following command to get the latest version of the package:

composer require prettus/l5-repository

Laravel

>= laravel5.5

ServiceProvider will be attached automatically

Other

In your

config/app.php
add
Prettus\Repository\Providers\RepositoryServiceProvider::class
to the end of the
providers
array:
'providers' => [
    ...
    Prettus\Repository\Providers\RepositoryServiceProvider::class,
],

If Lumen

$app->register(Prettus\Repository\Providers\LumenRepositoryServiceProvider::class);

Publish Configuration

php artisan vendor:publish --provider "Prettus\Repository\Providers\RepositoryServiceProvider"

Methods

Prettus\Repository\Contracts\RepositoryInterface

  • all($columns = array('*'))
  • first($columns = array('*'))
  • paginate($limit = null, $columns = ['*'])
  • find($id, $columns = ['*'])
  • findByField($field, $value, $columns = ['*'])
  • findWhere(array $where, $columns = ['*'])
  • findWhereIn($field, array $where, $columns = [*])
  • findWhereNotIn($field, array $where, $columns = [*])
  • findWhereBetween($field, array $where, $columns = [*])
  • create(array $attributes)
  • update(array $attributes, $id)
  • updateOrCreate(array $attributes, array $values = [])
  • delete($id)
  • deleteWhere(array $where)
  • orderBy($column, $direction = 'asc');
  • with(array $relations);
  • has(string $relation);
  • whereHas(string $relation, closure $closure);
  • hidden(array $fields);
  • visible(array $fields);
  • scopeQuery(Closure $scope);
  • getFieldsSearchable();
  • setPresenter($presenter);
  • skipPresenter($status = true);

Prettus\Repository\Contracts\RepositoryCriteriaInterface

  • pushCriteria($criteria)
  • popCriteria($criteria)
  • getCriteria()
  • getByCriteria(CriteriaInterface $criteria)
  • skipCriteria($status = true)
  • getFieldsSearchable()

Prettus\Repository\Contracts\CacheableInterface

  • setCacheRepository(CacheRepository $repository)
  • getCacheRepository()
  • getCacheKey($method, $args = null)
  • getCacheMinutes()
  • skipCache($status = true)

Prettus\Repository\Contracts\PresenterInterface

  • present($data);

Prettus\Repository\Contracts\Presentable

  • setPresenter(PresenterInterface $presenter);
  • presenter();

Prettus\Repository\Contracts\CriteriaInterface

  • apply($model, RepositoryInterface $repository);

Prettus\Repository\Contracts\Transformable

  • transform();

Usage

Create a Model

Create your model normally, but it is important to define the attributes that can be filled from the input form data.

namespace App;

class Post extends Eloquent { // or Ardent, Or any other Model Class

protected $fillable = [
    'title',
    'author',
    ...
 ];

 ...

}

Create a Repository

namespace App;

use Prettus\Repository\Eloquent\BaseRepository;

class PostRepository extends BaseRepository {

/**
 * Specify Model class name
 *
 * @return string
 */
function model()
{
    return "App\\Post";
}

}

Generators

Create your repositories easily through the generator.

Config

You must first configure the storage location of the repository files. By default is the "app" folder and the namespace "App". Please note that, values in the

paths
array are acutally used as both namespace and file paths. Relax though, both foreward and backward slashes are taken care of during generation.
    ...
    'generator'=>[
        'basePath'=>app()->path(),
        'rootNamespace'=>'App\\',
        'paths'=>[
            'models'       => 'Entities',
            'repositories' => 'Repositories',
            'interfaces'   => 'Repositories',
            'transformers' => 'Transformers',
            'presenters'   => 'Presenters',
            'validators'   => 'Validators',
            'controllers'  => 'Http/Controllers',
            'provider'     => 'RepositoryServiceProvider',
            'criteria'     => 'Criteria',
        ]
    ]

You may want to save the root of your project folder out of the app and add another namespace, for example

    ...
     'generator'=>[
        'basePath'      => base_path('src/Lorem'),
        'rootNamespace' => 'Lorem\\'
    ]

Additionally, you may wish to customize where your generated classes end up being saved. That can be accomplished by editing the

paths
node to your liking. For example:
    'generator'=>[
        'basePath'=>app()->path(),
        'rootNamespace'=>'App\\',
        'paths'=>[
            'models'=>'Models',
            'repositories'=>'Repositories\\Eloquent',
            'interfaces'=>'Contracts\\Repositories',
            'transformers'=>'Transformers',
            'presenters'=>'Presenters'
            'validators'   => 'Validators',
            'controllers'  => 'Http/Controllers',
            'provider'     => 'RepositoryServiceProvider',
            'criteria'     => 'Criteria',
        ]
    ]

Commands

To generate everything you need for your Model, run this command:

php artisan make:entity Post

This will create the Controller, the Validator, the Model, the Repository, the Presenter and the Transformer classes. It will also create a new service provider that will be used to bind the Eloquent Repository with its corresponding Repository Interface. To load it, just add this to your [email protected] method:

    $this->app->register(RepositoryServiceProvider::class);

You can also pass the options from the

repository
command, since this command is just a wrapper.

To generate a repository for your Post model, use the following command

php artisan make:repository Post

To generate a repository for your Post model with Blog namespace, use the following command

php artisan make:repository "Blog\Post"

Added fields that are fillable

php artisan make:repository "Blog\Post" --fillable="title,content"

To add validations rules directly with your command you need to pass the

--rules
option and create migrations as well:
php artisan make:entity Cat --fillable="title:string,content:text" --rules="title=>required|min:2, content=>sometimes|min:10"

The command will also create your basic RESTfull controller so just add this line into your

routes.php
file and you will have a basic CRUD:
 Route::resource('cats', CatsController::class);

When running the command, you will be creating the "Entities" folder and "Repositories" inside the folder that you set as the default.

Now that is done, you still need to bind its interface for your real repository, for example in your own Repositories Service Provider.

App::bind('{YOUR_NAMESPACE}Repositories\PostRepository', '{YOUR_NAMESPACE}Repositories\PostRepositoryEloquent');

And use

public function __construct({YOUR_NAMESPACE}Repositories\PostRepository $repository){
    $this->repository = $repository;
}

Alternatively, you could use the artisan command to do the binding for you.

php artisan make:bindings Cats

Use methods

namespace App\Http\Controllers;

use App\PostRepository;

class PostsController extends BaseController {

/**
 * @var PostRepository
 */
protected $repository;

public function __construct(PostRepository $repository){
    $this->repository = $repository;
}

....

}

Find all results in Repository

$posts = $this->repository->all();

Find all results in Repository with pagination

$posts = $this->repository->paginate($limit = null, $columns = ['*']);

Find by result by id

$post = $this->repository->find($id);

Hiding attributes of the model

$post = $this->repository->hidden(['country_id'])->find($id);

Showing only specific attributes of the model

$post = $this->repository->visible(['id', 'state_id'])->find($id);

Loading the Model relationships

$post = $this->repository->with(['state'])->find($id);

Find by result by field name

$posts = $this->repository->findByField('country_id','15');

Find by result by multiple fields

$posts = $this->repository->findWhere([
    //Default Condition =
    'state_id'=>'10',
    'country_id'=>'15',
    //Custom Condition
    ['columnName','>','10']
]);

Find by result by multiple values in one field

$posts = $this->repository->findWhereIn('id', [1,2,3,4,5]);

Find by result by excluding multiple values in one field

$posts = $this->repository->findWhereNotIn('id', [6,7,8,9,10]);

Find all using custom scope

$posts = $this->repository->scopeQuery(function($query){
    return $query->orderBy('sort_order','asc');
})->all();

Create new entry in Repository

$post = $this->repository->create( Input::all() );

Update entry in Repository

$post = $this->repository->update( Input::all(), $id );

Delete entry in Repository

$this->repository->delete($id)

Delete entry in Repository by multiple fields

$this->repository->deleteWhere([
    //Default Condition =
    'state_id'=>'10',
    'country_id'=>'15',
])

Create a Criteria

Using the command

php artisan make:criteria My

Criteria are a way to change the repository of the query by applying specific conditions according to your needs. You can add multiple Criteria in your repository.

use Prettus\Repository\Contracts\RepositoryInterface;
use Prettus\Repository\Contracts\CriteriaInterface;

class MyCriteria implements CriteriaInterface {

public function apply($model, RepositoryInterface $repository)
{
    $model = $model->where('user_id','=', Auth::user()->id );
    return $model;
}

}

Using the Criteria in a Controller

namespace App\Http\Controllers;

use App\PostRepository;

class PostsController extends BaseController {

/**
 * @var PostRepository
 */
protected $repository;

public function __construct(PostRepository $repository){
    $this->repository = $repository;
}


public function index()
{
    $this->repository->pushCriteria(new MyCriteria1());
    $this->repository->pushCriteria(MyCriteria2::class);
    $posts = $this->repository->all();
    ...
}

}

Getting results from Criteria

$posts = $this->repository->getByCriteria(new MyCriteria());

Setting the default Criteria in Repository

use Prettus\Repository\Eloquent\BaseRepository;

class PostRepository extends BaseRepository {

public function boot(){
    $this->pushCriteria(new MyCriteria());
    // or
    $this->pushCriteria(AnotherCriteria::class);
    ...
}

function model(){
   return "App\\Post";
}

}

Skip criteria defined in the repository

Use

skipCriteria
before any other chaining method
$posts = $this->repository->skipCriteria()->all();

Popping criteria

Use

popCriteria
to remove a criteria
$this->repository->popCriteria(new Criteria1());
// or
$this->repository->popCriteria(Criteria1::class);

Using the RequestCriteria

RequestCriteria is a standard Criteria implementation. It enables filters to perform in the repository from parameters sent in the request.

You can perform a dynamic search, filter the data and customize the queries.

To use the Criteria in your repository, you can add a new criteria in the boot method of your repository, or directly use in your controller, in order to filter out only a few requests.

Enabling in your Repository

use Prettus\Repository\Eloquent\BaseRepository;
use Prettus\Repository\Criteria\RequestCriteria;


class PostRepository extends BaseRepository {

/**
 * @var array
 */
protected $fieldSearchable = [
    'name',
    'email'
];

public function boot(){
    $this->pushCriteria(app('Prettus\Repository\Criteria\RequestCriteria'));
    ...
}

function model(){
   return "App\\Post";
}

}

Remember, you need to define which fields from the model can be searchable.

In your repository set $fieldSearchable with the name of the fields to be searchable or a relation to fields.

protected $fieldSearchable = [
    'name',
    'email',
    'product.name'
];

You can set the type of condition which will be used to perform the query, the default condition is "="

protected $fieldSearchable = [
    'name'=>'like',
    'email', // Default Condition "="
    'your_field'=>'condition'
];

Enabling in your Controller

    public function index()
    {
        $this->repository->pushCriteria(app('Prettus\Repository\Criteria\RequestCriteria'));
        $posts = $this->repository->all();
        ...
    }

Example the Criteria

Request all data without filter by request

http://prettus.local/users
[
    {
        "id": 1,
        "name": "John Doe",
        "email": "[email protected]",
        "created_at": "-0001-11-30 00:00:00",
        "updated_at": "-0001-11-30 00:00:00"
    },
    {
        "id": 2,
        "name": "Lorem Ipsum",
        "email": "[email protected]",
        "created_at": "-0001-11-30 00:00:00",
        "updated_at": "-0001-11-30 00:00:00"
    },
    {
        "id": 3,
        "name": "Laravel",
        "email": "[email protected]",
        "created_at": "-0001-11-30 00:00:00",
        "updated_at": "-0001-11-30 00:00:00"
    }
]

Conducting research in the repository

http://prettus.local/users?search=John%20Doe

or

http://prettus.local/users?search=John&searchFields=name:like

or

http://prettus.local/[email protected]&searchFields=email:=

or

http://prettus.local/users?search=name:John Doe;email:[email protected]

or

http://prettus.local/users?search=name:John;email:[email protected]&searchFields=name:like;email:=
[
    {
        "id": 1,
        "name": "John Doe",
        "email": "[email protected]",
        "created_at": "-0001-11-30 00:00:00",
        "updated_at": "-0001-11-30 00:00:00"
    }
]

By default RequestCriteria makes its queries using the OR comparison operator for each query parameter.

http://prettus.local/users?search=age:17;email:[email protected]

The above example will execute the following query:

sql
SELECT * FROM users WHERE age = 17 OR email = '[email protected]';

In order for it to query using the AND, pass the searchJoin parameter as shown below:

http://prettus.local/users?search=age:17;email:[email protected]&searchJoin=and

Filtering fields

http://prettus.local/users?filter=id;name
[
    {
        "id": 1,
        "name": "John Doe"
    },
    {
        "id": 2,
        "name": "Lorem Ipsum"
    },
    {
        "id": 3,
        "name": "Laravel"
    }
]

Sorting the results

http://prettus.local/users?filter=id;name&orderBy=id&sortedBy=desc
[
    {
        "id": 3,
        "name": "Laravel"
    },
    {
        "id": 2,
        "name": "Lorem Ipsum"
    },
    {
        "id": 1,
        "name": "John Doe"
    }
]

Sorting through related tables

http://prettus.local/users?orderBy=posts|title&sortedBy=desc

Query will have something like this

...
INNER JOIN posts ON users.post_id = posts.id
...
ORDER BY title
...

http://prettus.local/users?orderBy=posts:custom_id|posts.title&sortedBy=desc

Query will have something like this

...
INNER JOIN posts ON users.custom_id = posts.id
...
ORDER BY posts.title
...

Sorting multiple columns same sortedBy

http://prettus.local/users?orderBy=name;created_at&sortedBy=desc

Result will have something like this

   [
       {
           "id": 1,
           "name": "Laravel",
           "created_at": "-0001-11-29 00:00:00"
       },
       {
           "id": 3,
           "name": "Laravel",
           "created_at": "-0001-11-28 00:00:00"
       },
       {
           "id": 2,
           "name": "John Doe",
           "created_at": "-0001-11-30 00:00:00"
       }
   ]

Sorting multiple columns difference sortedBy

http://prettus.local/users?orderBy=name;created_at&sortedBy=desc;asc

Result will have something like this

   [
       {
           "id": 3,
           "name": "Laravel",
           "created_at": "-0001-11-28 00:00:00"
       },
       {
           "id": 1,
           "name": "Laravel",
           "created_at": "-0001-11-29 00:00:00"
       },
       {
           "id": 2,
           "name": "John Doe",
           "created_at": "-0001-11-30 00:00:00"
       }
   ]

Add relationship

http://prettus.local/users?with=groups

Overwrite params name

You can change the name of the parameters in the configuration file config/repository.php

Cache

Add a layer of cache easily to your repository

Cache Usage

Implements the interface CacheableInterface and use CacheableRepository Trait.

use Prettus\Repository\Eloquent\BaseRepository;
use Prettus\Repository\Contracts\CacheableInterface;
use Prettus\Repository\Traits\CacheableRepository;

class PostRepository extends BaseRepository implements CacheableInterface {

use CacheableRepository;

...

}

Done , done that your repository will be cached , and the repository cache is cleared whenever an item is created, modified or deleted.

Cache Config

You can change the cache settings in the file config/repository.php and also directly on your repository.

config/repository.php

'cache'=>[
    //Enable or disable cache repositories
    'enabled'   => true,

//Lifetime of cache
'minutes'   => 30,

//Repository Cache, implementation Illuminate\Contracts\Cache\Repository
'repository'=> 'cache',

//Sets clearing the cache
'clean'     => [
    //Enable, disable clearing the cache on changes
    'enabled' => true,

    'on' => [
        //Enable, disable clearing the cache when you create an item
        'create'=>true,

        //Enable, disable clearing the cache when upgrading an item
        'update'=>true,

        //Enable, disable clearing the cache when you delete an item
        'delete'=>true,
    ]
],
'params' => [
    //Request parameter that will be used to bypass the cache repository
    'skipCache'=>'skipCache'
],
'allowed'=>[
    //Allow caching only for some methods
    'only'  =>null,

    //Allow caching for all available methods, except
    'except'=>null
],

],

It is possible to override these settings directly in the repository.

use Prettus\Repository\Eloquent\BaseRepository;
use Prettus\Repository\Contracts\CacheableInterface;
use Prettus\Repository\Traits\CacheableRepository;

class PostRepository extends BaseRepository implements CacheableInterface {

// Setting the lifetime of the cache to a repository specifically
protected $cacheMinutes = 90;

protected $cacheOnly = ['all', ...];
//or
protected $cacheExcept = ['find', ...];

use CacheableRepository;

...

}

The cacheable methods are : all, paginate, find, findByField, findWhere, getByCriteria

Validators

Requires prettus/laravel-validator.

composer require prettus/laravel-validator

Easy validation with

prettus/laravel-validator

For more details click here

Using a Validator Class

Create a Validator

In the example below, we define some rules for both creation and edition

use \Prettus\Validator\LaravelValidator;

class PostValidator extends LaravelValidator {

protected $rules = [
    'title' => 'required',
    'text'  => 'min:3',
    'author'=> 'required'
];

}

To define specific rules, proceed as shown below:

use \Prettus\Validator\Contracts\ValidatorInterface;
use \Prettus\Validator\LaravelValidator;

class PostValidator extends LaravelValidator {

protected $rules = [
    ValidatorInterface::RULE_CREATE => [
        'title' => 'required',
        'text'  => 'min:3',
        'author'=> 'required'
    ],
    ValidatorInterface::RULE_UPDATE => [
        'title' => 'required'
    ]

];

}

Enabling Validator in your Repository
use Prettus\Repository\Eloquent\BaseRepository;
use Prettus\Repository\Criteria\RequestCriteria;

class PostRepository extends BaseRepository {

/**
 * Specify Model class name
 *
 * @return mixed
 */
function model(){
   return "App\\Post";
}

/**
 * Specify Validator class name
 *
 * @return mixed
 */
public function validator()
{
    return "App\\PostValidator";
}

}

Defining rules in the repository

Alternatively, instead of using a class to define its validation rules, you can set your rules directly into the rules repository property, it will have the same effect as a Validation class.

use Prettus\Repository\Eloquent\BaseRepository;
use Prettus\Repository\Criteria\RequestCriteria;
use Prettus\Validator\Contracts\ValidatorInterface;

class PostRepository extends BaseRepository {

/**
 * Specify Validator Rules
 * @var array
 */
 protected $rules = [
    ValidatorInterface::RULE_CREATE => [
        'title' => 'required',
        'text'  => 'min:3',
        'author'=> 'required'
    ],
    ValidatorInterface::RULE_UPDATE => [
        'title' => 'required'
    ]

];

/**
 * Specify Model class name
 *
 * @return mixed
 */
function model(){
   return "App\\Post";
}

}

Validation is now ready. In case of a failure an exception will be given of the type: Prettus\Validator\Exceptions\ValidatorException

Presenters

Presenters function as a wrapper and renderer for objects.

Fractal Presenter

Requires Fractal.

composer require league/fractal

There are two ways to implement the Presenter, the first is creating a TransformerAbstract and set it using your Presenter class as described in the Create a Transformer Class.

The second way is to make your model implement the Transformable interface, and use the default Presenter ModelFractarPresenter, this will have the same effect.

Transformer Class
Create a Transformer using the command
php artisan make:transformer Post

This will generate the class beneath.

Create a Transformer Class
use League\Fractal\TransformerAbstract;

class PostTransformer extends TransformerAbstract { public function transform(\Post $post) { return [ 'id' => (int) $post->id, 'title' => $post->title, 'content' => $post->content ]; } }

Create a Presenter using the command
php artisan make:presenter Post

The command will prompt you for creating a Transformer too if you haven't already.

Create a Presenter
use Prettus\Repository\Presenter\FractalPresenter;

class PostPresenter extends FractalPresenter {

/**
 * Prepare data to present
 *
 * @return \League\Fractal\TransformerAbstract
 */
public function getTransformer()
{
    return new PostTransformer();
}

}

Enabling in your Repository
use Prettus\Repository\Eloquent\BaseRepository;

class PostRepository extends BaseRepository {

...

public function presenter()
{
    return "App\\Presenter\\PostPresenter";
}

}

Or enable it in your controller with

$this->repository->setPresenter("App\\Presenter\\PostPresenter");
Using the presenter after from the Model

If you recorded a presenter and sometime used the

skipPresenter()
method or simply you do not want your result is not changed automatically by the presenter. You can implement Presentable interface on your model so you will be able to present your model at any time. See below:

In your model, implement the interface

Prettus\Repository\Contracts\Presentable
and
Prettus\Repository\Traits\PresentableTrait
namespace App;

use Prettus\Repository\Contracts\Presentable; use Prettus\Repository\Traits\PresentableTrait;

class Post extends Eloquent implements Presentable {

use PresentableTrait;

protected $fillable = [
    'title',
    'author',
    ...
 ];

 ...

}

There, now you can submit your Model individually, See an example:

$repository = app('App\PostRepository');
$repository->setPresenter("Prettus\\Repository\\Presenter\\ModelFractalPresenter");

//Getting the result transformed by the presenter directly in the search $post = $repository->find(1);

print_r( $post ); //It produces an output as array

...

//Skip presenter and bringing the original result of the Model $post = $repository->skipPresenter()->find(1);

print_r( $post ); //It produces an output as a Model object print_r( $post->presenter() ); //It produces an output as array

You can skip the presenter at every visit and use it on demand directly into the model, for it set the

$skipPresenter
attribute to true in your repository:
use Prettus\Repository\Eloquent\BaseRepository;

class PostRepository extends BaseRepository {

/**
* @var bool
*/
protected $skipPresenter = true;

public function presenter()
{
    return "App\\Presenter\\PostPresenter";
}

}

Model Class
Implement Interface
namespace App;

use Prettus\Repository\Contracts\Transformable;

class Post extends Eloquent implements Transformable { ... /** * @return array */ public function transform() { return [ 'id' => (int) $this->id, 'title' => $this->title, 'content' => $this->content ]; } }

Enabling in your Repository

Prettus\Repository\Presenter\ModelFractalPresenter
is a Presenter default for Models implementing Transformable
use Prettus\Repository\Eloquent\BaseRepository;

class PostRepository extends BaseRepository {

...

public function presenter()
{
    return "Prettus\\Repository\\Presenter\\ModelFractalPresenter";
}

}

Or enable it in your controller with

$this->repository->setPresenter("Prettus\\Repository\\Presenter\\ModelFractalPresenter");

Skip Presenter defined in the repository

Use skipPresenter before any other chaining method

$posts = $this->repository->skipPresenter()->all();

or

$this->repository->skipPresenter();

$posts = $this->repository->all();

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