How to set default value for form field in Symfony2

Question

Is there an easy way to set a default value for text form field

User · Answer

Default values are set by configuring corresponding entity  Before binding the entity to form set its color field to   0000FF       controller action  project   new Project     project- gt setColor   0000FF     form    this- gt createForm new ProjectType     project

User · Answer

My solution    defaultvalue    options  data  - gt getMyField     builder- gt add  myField    number   array               data    gt   empty  defaultvalue     options  data  - gt getMyField     0

User · Answer

If you re using a FormBuilder in symfony 2 7 to generate the form  you can also pass the initial data to the createFormBuilder method of the Controler   values   array       name    gt   Bob       formBuilder    this- gt createFormBuilder  values    formBuilder- gt add  name    text

User · Answer

Just so I understand the problem   You want to adjust the way the form is built based on data in your entity   If the entity is being created then use some default value   If the entity is existing use the database value   Personally  I think  MolecularMans s solution is the way to go   I would actually set the default values in the constructor or in the property statement   But you don t seem to like that approach   Instead you can follow this  http   symfony com doc current cookbook form dynamic form modification html  You hang a listener on your form type and you can then examine your entity and adjust the builder- add statements accordingly based on havine a new or existing entity   You still need to specify your default values somewhere though you could just code them in your listener   Or pass them into the form type   Seems like a lot of work though   Better to just pass the entity to the form with it s default values already set

User · Answer

Can be use during the creation easily with    - gt add  myfield    text   array        label    gt   Field         empty data    gt   Default value

User · Answer

If your form is bound to an entity  just set the default value on the entity itself using the construct method   public function   construct          this- gt field    default value

User · Answer

- gt addEventListener FormEvents  PRE SET DATA  function  FormEvent  event          form    event- gt getForm           data    event- gt getData           if   data    null              form- gt add  position   IntegerType  class  array  data    gt  0

User · Answer

Approach 1  from http   www cranespud com blog dead-simple-default-values-on-symfony2-forms    Simply set the default value in your entity  either in the variable declaration or the constructor   class Entity       private  color     0000FF               or  class Entity       private  color       public function   construct              this- gt color     0000FF                                  Approach 2 from a comment in the above link  and also Dmitriy s answer  not the accepted one  from How to set default value for form field in Symfony2   Add the default value to the data attribute when adding the field with the FormBuilder  adapted from Dmitriy s answer   Note that this assumes that the property will and will only have the value null when it s a new  and not an existing  entity   public function buildForm FormBuilderInterface  builder  array  options         builder- gt add  color    text   array               label    gt   Color                 data    gt   isset  options  data     amp  amp   options  data  - gt getColor       null     options  data  - gt getColor       0000FF

User · Answer

If you set  data  in your creation form  this value will be not modified when edit your entity   My solution is    public function buildForm FormBuilderInterface  builder  array  options           In my example  data is an associated array      data    builder- gt getData          builder- gt add  myfield    text   array        label    gt   Field         data    gt  array key exits  myfield    data     data  myfield      Default value               Bye

User · Answer

If you need to set default value and your form relates to the entity  then you should use following approach      buildForm   method public function buildForm FormBuilderInterface  builder  array  options         builder             - gt add           myField            text           array               data    gt  isset  options  data       options  data  - gt getMyField      my default value                       Otherwise  myField always will be set to default value  instead of getting value from entity

User · Answer

I usually just set the default value for specific field in my entity           var int     ORM Column type  integer   nullable true      protected  development time   0    This will work for new records or if just updating existing ones

User · Answer

I solved this problem  by adding value in attr   - gt add  projectDeliveringInDays   null         attr    gt               min   gt  1              value   gt  1

User · Answer

you can set the default value with empty data    builder- gt add  myField    number     empty data    gt   Default value

User · Answer

A general solution for any case approach  mainly by using a form without a class or when we need access to any services to set the default value      src Form Extension DefaultFormTypeExtension php  class DefaultFormTypeExtension extends AbstractTypeExtension       public function buildForm FormBuilderInterface  builder  array  options                if  null      options  default                   builder- gt addEventListener                  FormEvents  PRE SET DATA                  function  FormEvent  event  use   options                        if  null      event- gt getData                               event- gt setData  options  default                                                                                 public function configureOptions OptionsResolver  resolver                 resolver- gt setDefault  default   null              public function getExtendedType                 return FormType  class            and register the form extension   app form type extension      class  App Form Extension DefaultFormTypeExtension     tags          -   name  form type extension  extended type  Symfony Component Form Extension Core Type FormType     After that  we can use default option in any form field    formBuilder- gt add  user   null  array  default    gt   this- gt getUser       formBuilder- gt add  foo   null  array  default    gt   bar

User · Answer

As Brian asked      empty data appears to only set the field to 1 when it is submitted with no value    What about when you want the form to default to displaying 1 in the   input when no value is present    you can set the default value with empty value   builder- gt add  myField    number     empty value    gt   Default value

User · Answer

Often  for init default values of form i use fixtures  Of cause this way is not easiest  but very comfortable   Example   class LoadSurgeonPlanData implements FixtureInterface       public function load ObjectManager  manager                 surgeonPlan   new SurgeonPlan              surgeonPlan- gt setName  Free trial             surgeonPlan- gt setPrice 0            surgeonPlan- gt setDelayWorkHours 0            surgeonPlan- gt setSlug  free              manager- gt persist  surgeonPlan            manager- gt flush                         Yet  symfony type field have the option data   Example   builder- gt add  token    hidden   array       data    gt   abcdef

User · Answer

There is a very simple way  you can set defaults as here     defaults   array  sortby    gt   sortby  category    gt   category  page    gt  1     form    this- gt formfactory- gt createBuilder  form    defaults  - gt add  sortby   choice   - gt add  category   choice   - gt add  page   hidden   - gt getForm

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You can set a default value  e g  for the form message  like this    defaultData   array  message    gt   Type your message here     form    this- gt createFormBuilder  defaultData      - gt add  name    text       - gt add  email    email       - gt add  message    textarea       - gt add  send    submit       - gt getForm      In case your form is mapped to an Entity  you can go like this  e g  default username     user   new User     user- gt setUsername  John Doe      form    this- gt createFormBuilder  user      - gt add  username       - gt getForm

User · Answer

I ve contemplated this a few times in the past so thought I d jot down the different ideas I ve had   used  Something might be of use  but none are  perfect  Symfony2 solutions   Constructor In the Entity you can do  this- setBar  default value    but this is called every time you load the entity  db or not  and is a bit messy  It does however work for every field type as you can create dates or whatever else you need   If statements within get s I wouldn t  but you could   return      this- gt hasFoo        default     this- gt foo    Factory   instance   Call a static function   secondary class which provides you a default Entity pre-populated with data  E g    function getFactory          obj   new static         obj- gt setBar  foo         obj- gt setFoo  bar        return  obj      Not really ideal given you ll have to maintain this function if you add extra fields  but it does mean you re separating the data setters   default and that which is generated from the db  Similarly you can have multiple getFactories should you want different defaulted data   Extended   Reflection entities Create a extending Entity  e g  FooCreate extends Foo  which gives you the defaulted data at create time  through the constructor   Similar to the Factory   instance idea just a different approach - I prefer static methods personally   Set Data before build form In the constructors   service  you know if you have a new entity or if it was populated from the db  It s plausible therefore to call set data on the different fields when you grab a new entity  E g    if     entity- gt isFromDB             entity- gt setBar  default          entity- gt setDate  date  Y-m-d                form    this- gt createForm        Form Events When you create the form you set default data when creating the fields  You override this use PreSetData event listener  The problem with this is that you re duplicating the form workload   duplicating code and making it harder to maintain   understand   Extended forms Similar to Form events  but you call the different type depending on if it s a db   new entity  By this I mean you have FooType which defines your edit form  BarType extends FooType this and sets all the data to the fields  In your controller you then simply choose which form type to instigate  This sucks if you have a custom theme though and like events  creates too much maintenance for my liking   Twig You can create your own theme and default the data using the value option too when you do it on a per-field basis  There is nothing stopping you wrapping this into a form theme either should you wish to keep your templates clean and the form reusable  e g    form widget form foo   attr    value   default         JS It d be trivial to populate the form with a JS function if the fields are empty  You could do something with placeholders for example  This is a bad  bad idea though   Forms as a service For one of the big form based projects I did  I created a service which generated all the forms  did all the processing etc  This was because the forms were to be used across multiple controllers in multiple environments and whilst the forms were generated   handled in the same way  they were displayed   interacted with differently  e g  error handling  redirections etc   The beauty of this approach was that you can default data  do everything you need  handle errors generically etc and it s all encapsulated in one place   Conclusion As I see it  you ll run into the same issue time and time again - where is the defaulted data to live     If you store it at db doctrine level what happens if you don t want to store the default every time  If you store it at Entity level what happens if you want to re-use that entity elsewhere without any data in it   If you store it at Entity Level and add a new field  do you want the previous versions to have that default value upon editing  Same goes for the default in the DB    If you store it at the form level  is that obvious when you come to maintain the code later  If it s in the constructor what happens if you use the form in multiple places  If you push it to JS level then you ve gone too far - the data shouldn t be in the view never mind JS  and we re ignoring compatibility  rendering errors etc  The service is great if like me you re using it in multiple places  but it s overkill for a simple add   edit form on one site      To that end  I ve approached the problem differently each time  For example  a signup form  newsletter  option is easily  and logically  set in the constructor just before creating the form  When I was building forms collections which were linked together  e g  which radio buttons in different form types linked together  then I ve used Event Listeners  When I ve built a more complicated entity  e g  one which required children or lots of defaulted data  I ve used a function  e g   getFactory   to create it element as I need it    I don t think there is one  right  approach as every time I ve had this requirement it s been slightly different   Good luck  I hope I ve given you some food for thought at any rate and didn t ramble too much

User · Answer

Don t use    data    gt   Default value    Read here  https   symfony com doc current reference forms types form html data   The data option always overrides the value taken from the domain data  object  when rendering  This means the object value is also overriden when the form edits an already persisted object  causing it to lose its persisted value when the form is submitted      Use the following   Lets say  for this example  you have an Entity Foo  and there is a field  active   in this example is CheckBoxType  but process is the same to every other type   which you want to be checked by default  In your FooFormType class add       use Symfony Component Form FormEvent  use Symfony Component Form FormEvents      public function buildForm  FormBuilderInterface  builder  array  options                   builder- gt add  active   CheckboxType  class  array           label    gt   Active                 builder- gt addEventListener          FormEvents  PRE SET DATA          function FormEvent  event                                 foo    event- gt getData                   Set Active to true  checked  if form is  create new    foo- gt active   null              if is null  foo- gt getActive      foo- gt setActive true                     public function configureOptions  OptionsResolver  resolver          resolver- gt setDefaults array           data class    gt   AppBundle Foo

User · Answer

If that field is bound to an entity  is a property of that entity  you can just set a default value for it   An example   public function getMyField         if  is null  this- gt MyField              this- gt setMyField  my default value              return  this- gt MyField

User · Answer

You can set the default for related field in your model class  in mapping definition or set the value yourself    Furthermore  FormBuilder gives you a chance to set initial values with setData   method  Form builder is passed to the createForm   method of your form class   Also  check this link  http   symfony com doc current book forms html using-a-form-without-a-class

[php] How to set default value for form field in Symfony2?

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