Factorisation/héritage dans les models

cotisations/models.py

@@ -61,22 +61,16 @@ class NewFactureForm(ModelForm):
 
     class Meta:
         model = Facture
-        exclude = ['user', 'prix', 'name', 'valid']
+        fields = ['paiement','banque','cheque','number']
+
+class EditFactureForm(NewFactureForm):
+    class Meta(NewFactureForm.Meta):
+        fields = '__all__'
 
-class EditFactureForm(ModelForm):
     def __init__(self, *args, **kwargs):
         super(EditFactureForm, self).__init__(*args, **kwargs)
         self.fields['user'].label = 'Adherent'
-        self.fields['number'].label = 'Quantité'
-        self.fields['cheque'].required = False
-        self.fields['banque'].required = False
-        self.fields['cheque'].label = 'Numero de chèque'
         self.fields['name'].label = 'Designation'
         self.fields['prix'].label = 'Prix unitaire'
-        self.fields['banque'].empty_label = "Non renseigné"
-        self.fields['paiement'].empty_label = "Séléctionner un moyen de paiement"
         self.fields['user'].empty_label = "Séléctionner l'adhérent propriétaire"
-
-    class Meta:
-        model = Facture
-        fields = '__all__'
+        self.fields.pop('article')