add core admin logic

core/admin.py

@@ -1,3 +1,112 @@
-from django.contrib import admin
 
 # Register your models here.
+from django.contrib import admin
+from django.contrib.admin import helpers
+from django.contrib.admin.utils import get_deleted_objects, model_ngettext
+from django.core.checks import messages
+from django.core.exceptions import PermissionDenied
+from django.db import router
+from django.template.response import TemplateResponse
+from django.utils.encoding import force_text
+from django.utils.translation import ugettext as _, ugettext_lazy
+
+from core.models import AbstractStatusModel
+
+admin.site.site_header = 'Русские программы'
+#admin.site.index_title = 'Features area'
+admin.site.site_title = 'Русские программы'
+admin.site.disable_action('delete_selected')
+
+
+def delete_selected_safe(modeladmin, request, queryset):
+    """
+        Default action which deletes the selected objects.
+
+        This action first displays a confirmation page which shows all the
+        deletable objects, or, if the user has no permission one of the related
+        childs (foreignkeys), a "permission denied" message.
+
+        Next, it deletes all selected objects and redirects back to the change list.
+        """
+    opts = modeladmin.model._meta
+    app_label = opts.app_label
+
+    # Check that the user has delete permission for the actual model
+    if not modeladmin.has_delete_permission(request):
+        raise PermissionDenied
+
+    using = router.db_for_write(modeladmin.model)
+
+    # Populate deletable_objects, a data structure of all related objects that
+    # will also be deleted.
+    deletable_objects, model_count, perms_needed, protected = get_deleted_objects(
+        queryset, opts, request.user, modeladmin.admin_site, using)
+
+    # The user has already confirmed the deletion.
+    # Do the deletion and return a None to display the change list view again.
+    if request.POST.get('post') and not protected:
+        if perms_needed:
+            raise PermissionDenied
+        n = queryset.count()
+        if n:
+            for obj in queryset:
+                obj_display = force_text(obj)
+                modeladmin.log_deletion(request, obj, obj_display)
+            for obj in queryset:
+                obj.delete()
+            modeladmin.message_user(request, _("Successfully deleted %(count)d %(items)s.") % {
+                "count": n, "items": model_ngettext(modeladmin.opts, n)
+            }, messages.SUCCESS)
+        # Return None to display the change list page again.
+        return None
+
+    if len(queryset) == 1:
+        objects_name = force_text(opts.verbose_name)
+    else:
+        objects_name = force_text(opts.verbose_name_plural)
+
+    if perms_needed or protected:
+        title = _("Cannot delete %(name)s") % {"name": objects_name}
+    else:
+        title = _("Are you sure?")
+
+    context = dict(
+        modeladmin.admin_site.each_context(request),
+        title=title,
+        objects_name=objects_name,
+        deletable_objects=[deletable_objects],
+        model_count=dict(model_count).items(),
+        queryset=queryset,
+        perms_lacking=perms_needed,
+        protected=protected,
+        opts=opts,
+        action_checkbox_name=helpers.ACTION_CHECKBOX_NAME,
+        media=modeladmin.media,
+    )
+
+    request.current_app = modeladmin.admin_site.name
+
+    # Display the confirmation page
+    return TemplateResponse(request, modeladmin.delete_selected_confirmation_template or [
+        "admin/%s/%s/delete_selected_confirmation.html" % (app_label, opts.model_name),
+        "admin/%s/delete_selected_confirmation.html" % app_label,
+        "admin/delete_selected_confirmation.html"
+    ], context)
+
+delete_selected_safe.short_description = ugettext_lazy("Delete selected %(verbose_name_plural)s safe")
+
+
+class SafeModelAdmin(admin.ModelAdmin):
+    actions = [
+        delete_selected_safe,
+    ]
+    exclude = ('create_at', 'updated_at')
+
+    def has_delete_permission(self, request, obj=None):
+        return issubclass(self.model, AbstractStatusModel)
+
+    def get_actions(self, request):
+        actions = super().get_actions(request)
+        if 'delete_selected_safe' in actions and not issubclass(self.model, AbstractStatusModel):
+            del actions['delete_selected_safe']
+        return actions