AttributeError: 'QuerySet' object has no attribute 'objects', breaking the query attributes

Solution 1:

Your stocks is already a QuerySet, so you can obtain the values with:

if request.method == 'POST':
    index = request.POST.get('dropdown_index')
    stocks = Indexes.objects.filter(Symbol=index)
    Open = stocks.values("Open")
    High = stocks.values("High")
    Close = stocks.values("Close")
    Low = stocks.values("Low")

This will however make four queries to the database, you can fetch the values for Open, High, Close and Low all in the same query from the database:

if request.method == 'POST':
    index = request.POST.get('dropdown_index')
    stocks = Indexes.objects.filter(Symbol=index)
    data = stocks.values("Open", "High", "Close", "Low")