how to sort object in django-CodePudding

def bubble_sort(nts):
nts_len = len(nts)
for i in range(nts_len):
    for p in range(nts_len - i - 1):
        if nts[p] < nts[p 1]:
            t = nts[p]
            nts[p]= nts[p 1]
            nts[p 1] = t
return nts
def menu(request):
products = Product.objects.all()
if request.method == "POST":
    s = request.POST['select']
    if s == 'Price: Low to High':
        element = []
        for var in products:
            element.append(var)
        list_items = list(element)
        bb = bubble_sort(list_items)
        el = list(bb)
        print(el)
        
        pro = Product.objects.filter(id__in=bb)
        print(pro)
        products = bb

        # print(products)

How to retrieve data from database in bubble sort for objects?TypeError: '<' not supported between instances of 'Product' and 'Product'

CodePudding user response：

You can user order_by():

Product.objects.all().order_by('field_name')

CodePudding user response：

your bubble sort looks wrong try this one:

def bubbleSort(lis):
    length = len(lis)
    for i in range(length):
        for j in range(length - i):
            a = lis[j]
            if a != lis[-1]:
                b = lis[j   1]
                if a > b:
                    lis[j] = b
                    lis[j   1] = a
    return lis

and you can sort by django ORM or SQL command like order_by ASC or DESC

CodePudding user response：

You use order_by()

# if you want products in ascending order by field_name
ordered_products = Product.objects.order_by('field_name')

# if your want products in descending order by field_name
ordered_products = Product.objects.order_by('-field_name')