How can I send JSON response in symfony2 controller

Question

I am using jQuery to edit my form which is built in Symfony   I am showing the form in jQuery dialog and then submitting it   Data is entering correctly in database   But I don t know whether I need to send some JSON back to jQuery  Actually I am bit confused with JSON thing   Suppose I have added a row in my table with   jQuery and when I submit the form then after data is submitted I want to send back those row data so that I can dynamically add the table row to show the data added   I am confused how can get that data back   This is my current code    editForm    this- gt createForm new StepsType     entity     request    this- gt getRequest      editForm- gt bindRequest  request    if   editForm- gt isValid           em- gt persist  entity        em- gt flush         return  this- gt render    success html twig                       This is just the template with success message

User · Accepted Answer

Symfony 2 1   response   new Response json encode array  name    gt   name      response- gt headers- gt set  Content-Type    application json     return  response      Symfony 2 2 and higher  You have special JsonResponse class  which serialises array to JSON   return new JsonResponse array  name    gt   name        But if your problem is How to serialize entity then you should have a look at JMSSerializerBundle  Assuming that you have it installed  you ll have simply to do   serializedEntity    this- gt container- gt get  serializer  - gt serialize  entity   json     return new Response  serializedEntity     You should also check for similar problems on StackOverflow      How to encode Doctrine entities to JSON in Symfony 2 0 AJAX application    Symfony 2 Doctrine export to JSON

User · Answer

If your data is already serialized   a  send a JSON response  public function someAction          response   new Response         response- gt setContent file get contents  path to file          response- gt headers- gt set  Content-Type    application json        return  response      b  send a JSONP response  with callback   public function someAction          response   new Response         response- gt setContent      FUNCTION CALLBACK NAME     file get contents  path to file                 response- gt headers- gt set  Content-Type    text javascript        return  response      If your data needs be serialized   c  send a JSON response  public function someAction          response   new JsonResponse         response- gt setData  some array        return  response      d  send a JSONP response  with callback   public function someAction          response   new JsonResponse         response- gt setData  some array         response- gt setCallback  FUNCTION CALLBACK NAME        return  response      e  use groups in Symfony 3 x x  Create groups inside your Entities   lt  php  namespace Mindlahus   use Symfony Component Serializer Annotation Groups          Some Super Class Name        ORM    able  table name       ORM Entity repositoryClass  SomeSuperClassNameRepository       UniqueEntity      fields   foo    boo        ignoreNull false          class SomeSuperClassName                   Groups   group1    group2                public  foo                  Groups   group1                public  date                   Groups   group3                public function getBar      is  methods are also supported               return  this- gt bar                        Normalize your Doctrine Object inside the logic of your application   lt  php  use Symfony Component HttpFoundation Response  use Symfony Component Serializer Mapping Factory ClassMetadataFactory     For annotations use Doctrine Common Annotations AnnotationReader  use Symfony Component Serializer Mapping Loader AnnotationLoader  use Symfony Component Serializer Serializer  use Symfony Component Serializer Normalizer ObjectNormalizer  use Symfony Component Serializer Encoder JsonEncoder         repository    this- gt getDoctrine  - gt getRepository  Mindlahus SomeSuperClassName     SomeSuperObject    repository- gt findOneById  id     classMetadataFactory   new ClassMetadataFactory new AnnotationLoader new AnnotationReader       encoder   new JsonEncoder     normalizer   new ObjectNormalizer  classMetadataFactory    callback   function   dateTime        return  dateTime instanceof  DateTime            dateTime- gt format  m-d-Y                     normalizer- gt setCallbacks array  date    gt   callback     serializer   new Serializer array  normalizer   array  encoder     data    serializer- gt normalize  SomeSuperObject  null  array  groups    gt  array  group1        response   new Response     response- gt setContent  serializer- gt serialize  data   json      response- gt headers- gt set  Content-Type    application json    return  response

User · Answer

To complete  thecatontheflat answer I would recommend to also wrap your action inside of a try     catch block  This will prevent your JSON endpoint from breaking on exceptions  Here s the skeleton I use   public function someAction         try               Your logic here             return new JsonResponse                success    gt  true               data       gt        Your data here                    catch   Exception  exception             return new JsonResponse                success    gt  false               code       gt   exception- gt getCode                 message    gt   exception- gt getMessage                           This way your endpoint will behave consistently even in case of errors and you will be able to treat them right on a client side

User · Answer

Symfony 2 1 has a JsonResponse class   return new JsonResponse array  name    gt   name      The passed in array will be JSON encoded the status code will default to 200 and the content type will be set to application json   There is also a handy setCallback function for JSONP

User · Answer

Since Symfony 3 1 you can use JSON Helper http   symfony com doc current book controller html json-helper  public function indexAction        returns    username   jane doe    and sets the proper Content-Type header return  this- gt json array  username    gt   jane doe         the shortcut defines three optional arguments    return  this- gt json  data   status   200   headers   array     context   array

[php] How can I send JSON response in symfony2 controller

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