Améliore TemplateLabelField

- Rajouter une option pour `option_template_name` et `context_object_name` dans la classe, et documente mieux. Répercute ces changements dans `InscriptionReventeForm`.

bda/forms.py

@@ -113,20 +113,31 @@ class AnnulForm(forms.Form):
 
 class TemplateLabelField(forms.ModelMultipleChoiceField):
     """
-    Offers an option to render a label with Django template rendering
+    Extends ModelMultipleChoiceField to offer two more customization options :
+    - `label_from_instance` can be used with a template file
+    - the widget rendering template can be specified with `option_template_name`
     """
 
-    def __init__(self, template_name=None, context_object_name="obj", *args, **kwargs):
+    def __init__(
+        self,
+        label_template_name=None,
+        context_object_name="obj",
+        option_template_name=None,
+        *args,
+        **kwargs
+    ):
         super().__init__(*args, **kwargs)
-        self.template_name = template_name
+        self.label_template_name = label_template_name
         self.context_object_name = context_object_name
+        if option_template_name is not None:
+            self.widget.option_template_name = option_template_name
 
     def label_from_instance(self, obj):
-        if self.template_name is None:
+        if self.label_template_name is None:
             return super().label_from_instance(obj)
         else:
             return loader.render_to_string(
-                self.template_name, context={self.context_object_name: obj}
+                self.label_template_name, context={self.context_object_name: obj}
             )
 
 
@@ -135,7 +146,8 @@ class InscriptionReventeForm(forms.Form):
         queryset=Spectacle.objects.none(),
         widget=forms.CheckboxSelectMultiple,
         required=False,
-        template_name="bda/forms/spectacle_label_table.html",
+        label_template_name="bda/forms/spectacle_label_table.html",
+        option_template_name="bda/forms/checkbox_table.html",
         context_object_name="spectacle",
     )
 
@@ -144,9 +156,6 @@ class InscriptionReventeForm(forms.Form):
         self.fields["spectacles"].queryset = tirage.spectacle_set.select_related(
             "location"
         ).filter(date__gte=timezone.now())
-        self.fields[
-            "spectacles"
-        ].widget.option_template_name = "bda/forms/spectacle_checkbox_table.html"
 
 
 class ReventeTirageAnnulForm(forms.Form):