Everything can be changed. Look under auto_id in the newforms docs on
djangoproject.com. The default does it exactly the way you seem to
be, prepending 'id_' to the field name. If you want to set a class,
you need to change the attrs dict on the field's widget.
All a newforms field really consists of is a field class that handles
validation, and a widget class that handles making the html form
element for that field. By defining your form class they start out in
FormClassName.base_fields['fieldname']. Once you actually make a form
instance by doing form=FormClassName(), you access them via
form.fields['fieldname'] and not base_fields (because the Form class
is a metaclass). So, if you have a form instance:
form.fields is a dict of all the form fields. form['fieldname'] is
the field class instance for the type you gave fieldname when you
defined the form. form['fieldname'].widget is the widget class
instance which you either specified, or django supplied the default
widget for the field type. The widget has an attribute dict called
'attrs', that is home for the form element attributes like 'class', or
'size', or 'style'. If you put them in the attrs dict, they show up
on the html element when it's rendered in the template.
Three different ways of doing the exact same thing (adding a css class
to a field):
You can do in the form class when you define the form,
contract_from =
forms.DateField(widget=TextInput(attrs={'class':'cssclassname'}))
or
After the form as been defined, but not instantiated by modifying
base_fields
NewEmployeeForm.base_fields['contract_from'].widget.attrs['class'] =
'cssclassname'
or
After the form has been instantiated by modifiying for forms local
field definitions, 'fields'
form.fields['contract_from'].widget.attrs['class'] = 'cssclassname'
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