Fix HeavySelect class attributes

Author: CleitonDeLima

django_select2/forms.py

@@ -227,6 +227,8 @@ class HeavySelect2Mixin:
     """Mixin that adds select2's AJAX options and registers itself on Django's cache."""
 
     dependent_fields = {}
+    data_view = None
+    data_url = None
 
     def __init__(self, attrs=None, choices=(), **kwargs):
         """
@@ -247,8 +249,8 @@ def __init__(self, attrs=None, choices=(), **kwargs):
 
         self.uuid = str(uuid.uuid4())
         self.field_id = signing.dumps(self.uuid)
-        self.data_view = kwargs.pop("data_view", None)
-        self.data_url = kwargs.pop("data_url", None)
+        self.data_view = kwargs.pop("data_view", self.data_view)
+        self.data_url = kwargs.pop("data_url", self.data_url)
 
         dependent_fields = kwargs.pop("dependent_fields", None)
         if dependent_fields is not None:

tests/testapp/forms.py

@@ -51,6 +51,14 @@ def label_from_instance(self, obj):
         return force_str(obj.title).upper()
 
 
+class ArtistDataViewWidget(HeavySelect2Widget):
+    data_view = "heavy_data_1"
+
+
+class PrimaryGenreDataUrlWidget(HeavySelect2Widget):
+    data_url = "/heavy_data_2/"
+
+
 class AlbumSelect2WidgetForm(forms.ModelForm):
     class Meta:
         model = models.Album
@@ -144,10 +152,10 @@ class Select2WidgetForm(forms.Form):
 
 class HeavySelect2WidgetForm(forms.Form):
     artist = forms.ChoiceField(
-        widget=HeavySelect2Widget(data_view="heavy_data_1"), choices=NUMBER_CHOICES
+        widget=ArtistDataViewWidget(), choices=NUMBER_CHOICES
     )
     primary_genre = forms.ChoiceField(
-        widget=HeavySelect2Widget(data_view="heavy_data_2"),
+        widget=PrimaryGenreDataUrlWidget(),
         required=False,
         choices=NUMBER_CHOICES,
     )