feat: django-import-export 4.0 support (3.x deprecated) (#398)

Author: lukasvinclav

src/unfold/contrib/import_export/admin.py

@@ -7,7 +7,7 @@
 
 def export_action_form_factory(formats):
     class _ExportActionForm(ActionForm):
-        file_format = forms.ChoiceField(
+        format = forms.ChoiceField(
             label=" ",
             choices=formats,
             required=False,

src/unfold/contrib/import_export/forms.py

@@ -1,16 +1,15 @@
-from import_export.forms import ExportForm as BaseExportForm
-from import_export.forms import ImportForm as BaseImportForm
+from import_export.forms import ImportExportFormBase as BaseImportExportFormBase
 from unfold.widgets import SELECT_CLASSES, UnfoldAdminFileFieldWidget
 
 
-class ImportForm(BaseImportForm):
+class ImportForm(BaseImportExportFormBase):
     def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)
-        self.fields["import_file"].widget = UnfoldAdminFileFieldWidget()
-        self.fields["input_format"].widget.attrs["class"] = " ".join(SELECT_CLASSES)
+        self.fields["resource"].widget = UnfoldAdminFileFieldWidget()
+        self.fields["format"].widget.attrs["class"] = " ".join(SELECT_CLASSES)
 
 
-class ExportForm(BaseExportForm):
+class ExportForm(BaseImportExportFormBase):
     def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)
-        self.fields["file_format"].widget.attrs["class"] = " ".join(SELECT_CLASSES)
+        self.fields["format"].widget.attrs["class"] = " ".join(SELECT_CLASSES)

src/unfold/contrib/import_export/templates/admin/import_export/export.html

@@ -37,7 +37,7 @@
         {% csrf_token %}
 
         <fieldset class="border border-gray-200 mb-8 rounded-md pt-3 px-3 shadow-sm dark:border-gray-800">
-            {% include "unfold/helpers/field.html" with field=form.file_format %}
+            {% include "unfold/helpers/field.html" with field=form.format %}
         </fieldset>
 
         <button type="submit" class="bg-primary-600 border border-transparent font-medium px-3 py-2 rounded-md text-sm text-white">

src/unfold/contrib/import_export/templates/admin/import_export/import_form.html

@@ -22,9 +22,9 @@
         </p>
 
         <fieldset class="border border-gray-200 mb-8 rounded-md pt-3 px-3 shadow-sm dark:border-gray-800">
-        {% include "unfold/helpers/field.html" with field=form.import_file %}
+        {% include "unfold/helpers/field.html" with field=form.resource %}
 
-        {% include "unfold/helpers/field.html" with field=form.input_format %}
+        {% include "unfold/helpers/field.html" with field=form.format %}
         </fieldset>