Django queryset filters: GT, LT, GTE, LTE

In Django, the following queryset filters are used to perform comparisons in database queries:

1. gt (greater than): This filter selects objects where the specified field is greater than the given value. For example:

   restaurants = Restaurant.objects.filter(price__gt=30.00)

This query will retrieve all Restaurant objects where the price field is greater than 30.00.

1. lt (less than): This filter selects objects where the specified field is less than the given value. For example:

   restaurants = Restaurant.objects.filter(price__lt=10.00)

This query will retrieve all Restaurant objects where the price field is less than 10.00.

1. gte (greater than or equal to): This filter selects objects where the specified field is greater than or equal to the given value. For example:

   restaurants = Restaurant.objects.filter(price__gte=10.00)

This query will retrieve all Restaurant objects where the price field is greater than or equal to 10.00.

1. lte (less than or equal to): This filter selects objects where the specified field is less than or equal to the given value. For example:

   restaurants = Restaurant.objects.filter(price__lte=30.00)

This query will retrieve all Restaurant objects where the price field is less than or equal to 30.00.

In the code you provided, these filters are used to perform price-based filtering on the Restaurant model. Depending on the selected price ranges, the code applies the appropriate filter using these queryset filters to retrieve the desired restaurants.