Setting the selected value on a Django forms ChoiceField

Question

Here is the field declaration in a form    max number   forms ChoiceField widget   forms Select         choices       1   1      2   2     3   3        initial  3   required   True     I would like to set the initial value to be 3 and this doesn t seem to work  I have played about with the param  quotes no quotes  etc    but no change   Could anyone give me a definitive answer if it is possible  And or the necessary tweak in my code snippet   I am using Django 1 0

User · Answer

I ran into this problem as well  and figured out that the problem is in the browser  When you refresh the browser is re-populating the form with the same values as before  ignoring the checked field  If you view source  you ll see the checked value is correct  Or put your cursor in your browser s URL field and hit enter  That will re-load the form from scratch

User · Answer

Both Tom and Burton s answers work for me eventually  but I had a little trouble figuring out how to apply them to a ModelChoiceField   The only trick to it is that the choices are stored as tuples of   lt model s ID gt    lt model s unicode repr gt    so if you want to set the initial model selection  you pass the model s ID as the initial value  not the object itself or it s name or anything else  Then it s as simple as   form   EmployeeForm initial   manager   manager employee id     Alternatively the initial argument can be ignored in place of an extra line with   form fields  manager   initial   manager employee id

User · Answer

This doesn t touch on the immediate question at hand  but this Q A comes up for searches related to trying to assign the selected value to a ChoiceField   If you have already called super     init   in your Form class  you should update the form initial dictionary  not the field initial property   If you study form initial  e g  print self initial after the call to super     init     it will contain values for all the fields   Having a value of None in that dict will override the field initial value   e g   class MyForm forms Form       def   init   self   args    kwargs           super MyForm  self    init    args    kwargs            assign a  computed  I assume  default value to the choice field         self initial  choices field name      default value            you should NOT do this          self fields  choices field name   initial    default value

User · Answer

To be sure I need to see how you re rendering the form  The initial value is only used in a unbound form  if it s bound and a value for that field is not included nothing will be selected

User · Answer

You can also do the following  in your form class def   max number   forms ChoiceField widget   forms Select                      choices       1   1      2   2     3   3        initial  3   required   True     then when calling the form in your view you can dynamically set both initial choices and choice list   yourFormInstance   YourFormClass    yourFormInstance fields  max number   choices     1 1   2 2   3 3   yourFormInstance fields  max number   initial    1    Note  the initial values has to be a list and the choices has to be 2-tuples  in my example above i have a list of 2-tuples  Hope this helps

User · Answer

Try setting the initial value when you instantiate the form   form   MyForm initial   max number    3

User · Answer

Dave - any luck finding a solution to the browser problem   Is there a way to force a refresh   As for the original problem  try the following when initializing the form   def   init   self   args    kwargs     super MyForm  self    init    args    kwargs       self base fields  MyChoiceField   initial   initial value

[django] Setting the selected value on a Django forms.ChoiceField

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