README.md edited

.venv/lib/python3.10/site-packages/django/contrib/gis/admin/options.py

@@ -0,0 +1,21 @@
+from django.contrib.admin import ModelAdmin
+from django.contrib.gis.db import models
+from django.contrib.gis.forms import OSMWidget
+
+
+class GeoModelAdminMixin:
+    gis_widget = OSMWidget
+    gis_widget_kwargs = {}
+
+    def formfield_for_dbfield(self, db_field, request, **kwargs):
+        if isinstance(db_field, models.GeometryField) and (
+            db_field.dim < 3 or self.gis_widget.supports_3d
+        ):
+            kwargs["widget"] = self.gis_widget(**self.gis_widget_kwargs)
+            return db_field.formfield(**kwargs)
+        else:
+            return super().formfield_for_dbfield(db_field, request, **kwargs)
+
+
+class GISModelAdmin(GeoModelAdminMixin, ModelAdmin):
+    pass