django-tips | Güttli 's opinionated Django Tips | Continuous Deployment library

Here are my simplified models:

I have a model (Meal) with several many to many fields (proteins, carbohydrates and fats), which I recently added a 'name' CharField to. I wanted to allow the user to enter a name for a meal, but if they do not enter a name, I want the name to be populated automatically based on the function definitions I have in the model which just concatenate the names of the foods in one string. I was trying to follow this guide.

Now, if the Meal already exists, what I have actually works fine. However, if it does not exist, the food_name for each item appears not to have saved yet because they are empty. I put the super(Meal,self).save() statement before my if not self.name: statement in the hopes that this would save the object to the database so that the food_names could then be retrieved, but it does not work and instead when I do save the name is saved as '(0)'. What I am looking for the name to populate via the __str__ function as 'Pork Tenderloin, Spinach (steamed/boiled), Potato (Red, medium) (3)', for example.

Also, if I don't call super(Meal,self).save() before the if statement, I actually get a 'maximum recursion depth exceeded' error.

Can anyone tell me if there is a way to auto populate this name field based on my function definition on object creation as I've described?

I am new to Django, and have limited experience with Python, so thank you very much for any help you can provide.

Here is my model:

I've recently started with Django web application development and now I want to put wood behind the arrow.

To do the job properly I started over and started to think of a correct naming convention for my web application. I've read through this blog article.

Until now, I've just created a project called myproject and the app is called myproject_app.

I realized, the only thing my myproject_app does is have the models.py with the database scheme, so I wondered if that is the way to go, or if I took a wrong turn somewhere.

With the app having nothing more that the description of my database, it's hard to think of a proper name and not just suffix it with _db or something like that.

To my question: What code belongs to a Django app and what is the appropriate naming convention for such apps?

edit: I did come by this Stackoverflow question, but it does not cover the code one is supposed to have in the Django app, just like it doesn't cover that in the blog article.