Django request.POST loop - django

Question

How can I loop through the request data and post it as one line in to the database, user can submit multiple descriptions, lengths and so on, problem I have is in the DB its creating massive amounts of rows to get to the correct format of the last one A1 but the user could submit A1,1,1,1,1; A2,2,2,8,100 and so on as its a dynamic add form)
descriptions = request.POST.getlist('description')
lengths = request.POST.getlist('lengthx')
widths = request.POST.getlist('widthx')
depths = request.POST.getlist('depthx')
quantitys = request.POST.getlist('qtyx')
for description in descriptions:
for lengt in lengths:
for width in widths:
for depth in depths:
for quantity in quantitys:
newquoteitem = QuoteItem.objects.create(
qdescription=description,
qlength=lengt,
qwidth=width,
qdepth=depth,
qquantity=quantity,
quote_number=quotenumber,
)
bottom entry is correct
post system

Answer 1

First solutions
Use formsets. That is exactly what they are meant to handle.
Second solution
descriptions = request.POST.getlist('description') is returning a list of all descriptions, so let's say there are 5, it iterates 5 times. Now lengths = request.POST.getlist('lengthx') is a list of all lengths, again, 5 of them, so it will iterate 5 times, and since it is nested within the descriptions for loop, that's 25 times!
So, although I still think formsets are the way to go, you can try the following:
descriptions = request.POST.getlist('description')
lengths = request.POST.getlist('lengthx')
widths = request.POST.getlist('widthx')
depths = request.POST.getlist('depthx')
quantitys = request.POST.getlist('qtyx')
for i in range(len(descriptions)):
newquoteitem = QuoteItem.objects.create(
qdescription=descriptions[i],
qlength=lengths[i],
qwidth=widths[i],
qdepth=depths[i],
qquantity=quantitys[i],
quote_number=quotenumber,
)
Here, if there are 5 descriptions, then len(descriptions) will be 5, and there is one loop, which will iterate 5 times in total.