Symfony Serializer doesn't convert an array of objects from camelCase to snake_case

Question

Can someone help me with this? I'm trying to serialize an object to json using the Symfony Serializer, it does convert object to json but it doesnt convert an array of objects from camelCase to snake_case.

Im currently using the default Serializer with Symfony 3.3

Below is my code.

app/config/config.yml

 framework: 
  serializer:  
    enabled: true
    name_converter: 'serializer.name_converter.camel_case_to_snake_case'

app/config/services.yml

 services:
    get_set_method_normalizer:
        class:Symfony\Component\Serializer\Normalizer\GetSetMethodNormalizer
        public: true
        tags: [serializer.normalizer]

Persons.php

class Person{
     private $firstName;
     private $lastName;
     private $email;

     //setters and getters
}

PersonController.php

class PersonController extends Controller {
     /**
      * @Route("api/person")
      * @Method("POST")
      */
     public function person(){
         $person = new Person();
          $person->setFirstName("test");
          $person->setLastName("test");
          $person->setEmail("[email protected]");

         $person1 = new Person();
         $person1->setFirstName("test 1");
          $person1->setLastName("test 1");
          $person1->setEmail("[email protected]");
         $arr = array($person, $person1);
         $serializer = $this->get("serializer");
         return new Response($serializer->serialize($arr,"json"));
     }

}

Below is the current output.

[
  {
     "firstName":"test",
     "lastName":"test"
     "email":"[email protected]"
  },
  {
     "firstName":"test 1",
     "lastName":"test 1"
     "email":"[email protected]"
  }
]

Expected output would be:

 [
   {
      "first_name":"test",
      "last_name":"test",
      "email":"[email protected]"
   },
   {
      "first_name":"test 1",
      "last_name":"test 1",
      "email":"[email protected]"
   }
]

Using your code above, I get the expected output on my machine. You're sure you cleared the cache? Can you post the use Statements? — Chris
– Chris, Commented Nov 30, 2017 at 14:31
I have the same problem on Symfony 4. I gave up and switch to Jms Serializer. — Daniel
– Daniel, Commented Apr 22, 2018 at 14:09

Macr1408 · Accepted Answer · 2019-04-08 17:25:26Z

4

For symfony 4 this worked for me:

Symfony\Component\Serializer\Normalizer\GetSetMethodNormalizer:
    public: true
    arguments: ['@serializer.mapping.class_metadata_factory', '@serializer.name_converter.camel_case_to_snake_case']
    tags: [serializer.normalizer]

Put that code inside your app/config/services.yaml, inside the "services" section.

answered Apr 8, 2019 at 17:25

Macr1408

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FORTIS · Accepted Answer · 2018-06-18 22:10:58Z

2

try explicitly pass arguments for your service:

get_set_method_normalizer:
        class:Symfony\Component\Serializer\Normalizer\GetSetMethodNormalizer
        public: true
        arguments: ['@serializer.mapping.class_metadata_factory', '@serializer.name_converter.camel_case_to_snake_case']
        tags: [serializer.normalizer]

answered Jun 18, 2018 at 22:10

FORTIS

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fullpipe · Accepted Answer · 2018-07-16 08:26:09Z

1

It is easier to add an alias for camel_case_to_snake_case

services:
    ...
    Symfony\Component\Serializer\NameConverter\NameConverterInterface: '@serializer.name_converter.camel_case_to_snake_case'

answered Jul 16, 2018 at 8:26

fullpipe

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