saad/fractal

Wraper for spatie fractal package

1.2.0 2018-08-10 23:55 UTC

Requires

• spatie/laravel-fractal: ^5.0

MIT

• Ahmed Saad

• api
• transform
• laravel
• fractal
• spatie
• lumen
• laravel-fractal

README

Spatie/Fractal

Install

You can pull in the package via composer:

	composer require saad/fractal

The package will automatically register itself.

Laravel Version

this package is compatible with laravel versions >= 5.5

Changelog

V 1.2.0

1. Add Strict Mode, so for null resources instead of returning empty array it will return null, By Default strict mode is Enabled

use

Exactly as spatie except that this package is automatically parse includes or excludes from parameters first if defined, otherwise it will look for query string includes and excludes

Default serializer is ArraySerializer

Console Generator

you can generate a new transformer class using the following command

the following command will create "App\Transformers\UserTransformer.php"

	php artisan make:transformer 'App\User'

to create in nested folders "App\Transformers\Sub1\Sub2\UserTransformer.php"

	php artisan make:transformer 'App\User' --nest='Sub1\Sub2'
	
	# Nest Name could be:
	
	# Sub1/Sub2
	# /Sub1/Sub2/
	# Sub1\\Sub2

Request Includes

will include defined includes from availableIncludes array

	
	// assume that Request Url = /countries?include=name,code,iso
	
	$couintries = Country::all();
	$transformed_data = \Saad\Fractal\Fractal::create($countries, new CountryTransformer());
	
	// CountryTransformer will include name, code and iso
	

Force Includes

we could also pass includes to create method as the 4th argument which will have the heighest periority than request include will include defined includes from availableIncludes array

	
	// assume that Request Url = /countries?include=name,code,iso
	
	$couintries = Country::all();
	$transformed_data = \Saad\Fractal\Fractal::create($countries, new CountryTransformer(), null, 'name,iso');
	
	// CountryTransformer will include only name and iso
	

Request Excludes

will exclude defined includes from defaultIncludes array

	
	// assume that Request Url = /countries?exclude=name,code
	
	$couintries = Country::all();
	$transformed_data = \Saad\Fractal\Fractal::create($countries, new CountryTransformer());
	
	// CountryTransformer will exclude name and code from default includes
	

Force Excludes

we could also pass excludes to create method as the 5th argument which will have the heighest periority than request include will include defined includes from defaultIncludes array

	
	// assume that Request Url = /countries?exclude=name,code,iso
	
	$couintries = Country::all();
	$transformed_data = \Saad\Fractal\Fractal::create($countries, new CountryTransformer(), null, null, 'name');
	
	// CountryTransformer will exclude only name from defaultIncludes
	

Transformer Abstract Class

this package has a base abstract Transformer Class Saad\Fractal\Transformers\TransformerAbstract you could use as the base class of your transformers, this class is based on extends League\Fractal\TransformerAbstract and adds the following features:

TransformerAbstract::strictMode(bool)

This mode added since V 1.2.0

null resources is returning empty array, when enable strict mode it will return NULL instead. By default strict mode is enabled

To control strict mode you could call one of these methods in one of the service providers boot method:

Enable Strict Mode (Enabled By Default):
TransformerAbstract::strictMode(true)
TransformerAbstract::enableStrictMode()

Disable Strict Mode:
TransformerAbstract::strictMode(false)
TransformerAbstract::disableStrictMode()

    // Assume we have this transformer
    class CountryTransformer extends TransformerAbstract {
        ...
        
        includeRegions(Country $country) {
            // assume there are no regions
            return $this->null();
        }
    }
    
	$transformer = new CountryTransformer();
	
	$output = Fractal::create($country, $transformer);
	
	// output when strict mode is enabled (default status)
	[
	    ...
		'regions' => null,
	]
	
	
	// Disable Strict Mode
	TransformerAbstract::disableStrictMode();
	
	$output = Fractal::create($country, $transformer);
    	
    // output when strict mode is disabled
    [
        ...
        'regions' => [],
    ]
	

transform() replaced by transforWithDefault()

you should use transforWithDefault() methodcinstead of transform() method this is because the new addEexternal feature

addExternal($key, $value)

you can add external value to output

	$transformer = new CountryTransformer();
	
	$output = Fractal::create($country, $transformer);
	
	// assume this output of country is 
	[
		'name' => 'Egypt',
		'iso' => 'EG' 
	]
	
	
	// If we want to add another key to output
	
	$transformer->addExternal('new_key', 'Iam New Value');
	$output = Fractal::create($country, $transformer);
	
	// Then output of country will be
	[
		'name' => 'Egypt',
		'iso' => 'EG',
		'new_key' => 'Iam New Value',
	]
	
	
	// We can also add external which have a calculated value depends on transformed object
	// assume we want to add new key to output named 'name_iso' which its value is the concatenation of both 'name' and 'iso' properies
	
	$transformer->addExternal('name_iso', function ($country_object) {
		return $country_object->name . '_' . $country_object->iso;
	});
	
	$output = Fractal::create($country, $transformer);
	
	// Then output of country will be
	[
		'name' => 'Egypt',
		'iso' => 'EG',
		'name_iso' => 'Egypt_EG',
	]
	
	

addDefaultInclude(string|array $defaults_to_add)

will add provided keys to defaultIncludes array

	// assume that defaultIncludes are ['id', 'name']
	$transformer = new CountryTransformer();
	$transformer->addDefaultInclude(['iso']);
	
	$output = Fractal::create($country, $transformer);
	
	// assume this output of country is 
	[
		'id' => 1,
		'name' => 'Egypt',
		
		'iso' => 'EG' // added to defaultIncludes
	]

Fractal Request Parser Singletone

this package also contains a singletone Saad\Fractal\FractalRequestParser which is a helper class that provides usefull methods about Request includes and excludes with the following methods :

Saad\Fractal\FractalRequestParser::includesHas($key_path)

Saad\Fractal\FractalRequestParser::excludesHas($key_path)

assume we have the following request URI ?include=name,sub.name:lang(ar),sub.country

 	$parser = Saad\Fractal\FractalRequestParser::getInstance();
 
 	// we can check the following
 	$parser->includesHas('name');  // true
 	$parser->includesHas('sub');  // true
 	$parser->includesHas('sub.name');  // true
 	$parser->includesHas('sub.country');  // true
 	
 	$parser->includesHas('iso');  // false
 	$parser->includesHas('sub.country.name');  // false

the same for excludesHas()