How can I make the field layout of a model form dynamic?

Hi,

I have a model that contains either a text or a numerical information, based on the type of the entry:

equipment = models.ForeignKey(equipment)
number = models.DecimalField('Amount/number', max_digits=6, decimal_places=2, blank=True, null=False, default=0)
text = models.TextField("Text", blank=True, null=True, default='')

Based on that model I created a model form:

class RoomsetupEquipmentForm(ModelForm):
    equipment = forms.ModelChoiceField(queryset=equipment.activeobjects.order_by('category__name', 'name'))

    def __init__(self, *args, **kwargs):
        super(RoomsetupEquipmentForm, self).__init__(*args, **kwargs)
        self.fields['equipment'].choices = equipment_as_choices()

    class Meta:
        model = roomsetup_equipments
        fields = ('equipment', 'number', 'text')

I'm looking for a way to selectively show either the number or the text field when the form is created.

Thomas

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