Change a Django form field to a hidden field

Question

I have a Django form with a RegexField  which is very similar to a normal text input field   In my view  under certain conditions I want to hide it from the user  and trying to keep the form as similar as possible  What s the best way to turn this field into a HiddenInput field   I know I can set attributes on the field with   form  fieldname   field widget attr  readonly      readonly    And I can set the desired initial value with   form initial  fieldname      mydesiredvalue    However  that won t change the form of the widget   What s the best   most  django-y    least  hacky  way to make this field a  lt input type  hidden  gt  field

User · Answer

This may also be useful     form field as hidden

User · Answer

For normal form you can do  class MyModelForm forms ModelForm       slug   forms CharField widget forms HiddenInput      If you have model form you can do the following  class MyModelForm forms ModelForm       class Meta          model   TagStatus         fields     slug    ext           widgets     slug   forms HiddenInput      You can also override   init   method  class Myform forms Form       def   init   self   args    kwargs           super Myform  self    init    args    kwargs          self fields  slug   widget   forms HiddenInput

User · Answer

Firstly  if you don t want the user to modify the data  then it seems cleaner to simply exclude the field   Including it as a hidden field just adds more data to send over the wire and invites a malicious user to modify it when you don t want them to   If you do have a good reason to include the field but hide it  you can pass a keyword arg to the modelform s constructor   Something like this perhaps   class MyModelForm forms ModelForm       class Meta          model   MyModel     def   init   self   args    kwargs           from django forms widgets import HiddenInput         hide condition   kwargs pop  hide condition  None          super MyModelForm  self    init    args    kwargs          if hide condition              self fields  fieldname   widget   HiddenInput                 or alternately   del self fields  fieldname    to remove it from the form altogether    Then in your view   form   MyModelForm hide condition True    I prefer this approach to modifying the modelform s internals in the view  but it s a matter of taste

User · Answer

You can just use css    x000D   x000D   id fieldname  label for  id fieldname     x000D    position  absolute  x000D    display  none x000D    x000D   x000D   x000D    This will make the field and its label invisible

User · Answer

If you want the field to always be hidden  use the following  class MyForm forms Form       hidden input   forms CharField widget forms HiddenInput    initial  quot value quot    If you want the field to be conditionally hidden  you can do the following  form   MyForm   if condition      form fields  quot field name quot   widget   forms HiddenInput       form fields  quot field name quot   initial    quot value quot

User · Answer

an option that worked for me  define the field in the original form as   forms CharField widget   forms HiddenInput    required   False    then when you override it in the new Class it will keep it s place

User · Answer

If you have a custom template and view you may  exclude the field and use    modelform instance field    to get the value   also you may prefer to use in the view   form fields  field name   widget   forms HiddenInput     but I m not sure it will protect save method on post   Hope it helps

[python] Change a Django form field to a hidden field

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