获取ImportError:无法从Django中的'walletapp.views‘导入名称'total_budget_left’

Question

我正在开发一个Django web应用程序。并得到了ImportError: cannot import name 'total_budget_left' from 'walletapp.views'。我想将total_budget_left这个变量从walletapp的views.py的一个函数导入到另一个应用程序的views.py函数中。

我的walletapp.views.py

def budgetView(request):
    preference = UserPreferences.objects.get_or_create(user=request.user)
    if preference:
        prefered_currency = UserPreferences.objects.get(user=request.user)

    budgets = Budget.objects.filter(owner=request.user)
    total_budget = sum(budgets.values_list('amount', flat=True))
    if budgets:
        for bud in budgets:
            cdate = bud.created_date
            edate = bud.end_date
        
        expenses = Expense.objects.filter(owner=request.user, date__gte=cdate, date__lte=edate)
        total_expense = sum(expenses.values_list('amount', flat=True))
        total_budget_left = total_budget - total_expense

我想将变量total_budget_left导入到另一个应用程序函数myapp.views.py中。

我的myapp.views.py

from walletapp.views import total_budget_left  
 
def index(request):
        print(total_budget_left)

即使尝试了多种方法，我也无法继续，请帮助我。提前谢谢。

Answer 1

在budgetView内部，保存会话中的值：

def budgetView(request):
    ...
    request.session['some_key'] = some_value

然后，另一个视图可以从会话中获取值(假设首先调用了budgetView )：

def someOtherView(request):
    some_value = request.session['some_key']