How to Set the Last Object of a Database Table in the File in Django


In this article, we show how to set the last object of a database table in the file in Django.

So when you use the last() function in a Django project, by default, it gets the last element by the id attribute. This always gets the 'last' item that was placed in the database table (the model).

However, this may not always be what you want.

You may want to use the last() function to get the last object based on price, which is the item of the most expensive price. This would be done if you have a table structured from price from lowest to highest. In this place, the last item would be the item with the highest price.

We can set the last object of the database in the file by setting the value of the get_latest_by attribute in a Meta class of the model. We set the value to a column, which in this example is 'price'.

This ensures that the last object will be the item that has the greatest price.

This is shown in the following code below.

So let's go over the code now.

So, in this code, we have created a model named Product (representing a product you can buy at an online store).

It has name, slug, description, and price fields.

We want to define a meta attribute so that we can define which object is classified as being the last object.

Normally again, by default, the last object would be the one with the greatest id attribute for the model.

However, in reality, we can customize this to anything.

In this example, we customize this to being the object with the greatest price.

So, underneath the definitions of the columns, we create a class Meta. With this class Meta, we specify the get_latest_by attribute to 'price'.

This makes the last object of the model the object with the greatest price.

Now when we use the last() function, it will return the item with the highest price.

Of course, there are other ways you can get the last object be according to the model being sorted in a certain way.

For example, you can use the following statment, Product.objects.all().order_by('price').last()

However, if you want the last() object to always represent the item with the highest price, then setting the get_latest_by attribute in the file is the best and purest way of doing this.

And this is how to set the last object of database table in the file in Django. in Django.

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