add user and start of deleting function

app/__init__.py

@@ -98,6 +98,7 @@ def create_app(environment="development"):
     )
 
     for view in [
+        ProtectedModelView(m.User, db.session, name="User", endpoint="/user_"),
         ProtectedModelView(m.Book, db.session, name="Book", endpoint="/book_"),
         ProtectedModelView(
             m.Collection, db.session, name="Collection", endpoint="/collection_"

app/controllers/flask_admin_customization/protected_model_view.py

@@ -1,6 +1,7 @@
 from flask_admin.contrib.sqla import ModelView
 from flask_login import current_user
-from flask import redirect, url_for
+from flask import redirect, url_for, flash
+from app.logger import log
 
 
 class ProtectedModelView(ModelView):
@@ -10,3 +11,26 @@ class ProtectedModelView(ModelView):
     def inaccessible_callback(self, name, **kwargs):
         # redirect to login page if user doesn't have access
         return redirect(url_for("main.index"))
+
+    def delete_model(self, model):
+        """
+        Delete model.
+        :param model:
+            Model to delete
+        """
+        try:
+            self.on_model_delete(model)
+            # Add your custom logic here and don't forget to commit any changes e.g.
+            # self.session.commit()
+        except Exception as ex:
+            if not self.handle_view_exception(ex):
+                flash("Failed to delete record.", "danger")
+                log(log.WARNING, "Failed to delete record.Because [%s]", ex)
+
+            self.session.rollback()
+
+            return False
+        else:
+            self.after_model_delete(model)
+
+        return True