自定义 Django 管理员操作返回无效的文字错误

Question

我有一个 django 模型Customer，我构建了一个自定义管理操作来更新其中一个模型字段。为了创建操作，我创建了如下函数：

def age(ModelAdmin, request, queryset):
if customer.Age == '60 +':
    customer.Age = 0
elif customer.Age == '36 - 59':
    customer.Age = 1
else:
    customer.Age = 2
return customer.Age
def education(ModelAdmin, request, queryset):
    if customer.Education == 'Highschool and below':
        customer.Education = 0
    else:
        customer.Education = 1
    return customer.Education
def employment(ModelAdmin, request, queryset):
    if customer.Employment == 'Student':
        customer.Employment = 0
    elif customer.Employment == 'Contract':
        customer.Employment = 1
    else:
        customer.Employment = 2
    return customer.Employment
def stability(ModelAdmin, request, queryset):
    if customer.Employer_Stability == 'Unstable':
        customer.Employer_Stability = 0
    else:
        customer.Employer_Stability = 1
    return customer.Employer_Stability
def residential(ModelAdmin, request, queryset):
    if customer.Residential_Status == 'Rented':
        customer.Residential_Status = 0
    else:
        customer.Residential_Status = 1
    return customer.Residential_Status
def salary(ModelAdmin, request, queryset):
    if customer.Salary <= 1000:
        customer.Salary = 0
    elif 1000 < customer.Salary <= 10001:
        customer.Salary = 1
    else:
        customer.Salary = 2
    return customer.Salary
def loyalty(ModelAdmin, request, queryset):
    if customer.Customer_Loyalty <= 2:
        customer.Customer_Loyalty = 0
    else:
        customer.Customer_Loyalty = 1
    return customer.Customer_Loyalty
def balance(ModelAdmin, request, queryset):
    if customer.Balance <= 2500:
        customer.Balance = 0
    elif 2500 < customer.Balance <= 10001:
        customer.Balance = 1
    else:
        customer.Balance = 2
    return customer.Balance
def feat_list(age, education, employment, stability, residential, salary, 
        loyalty, balance):
    total = age() + education() + employment() + stability() + residential() 
        + salary() + loyalty() + balance()
    return total
def allocate_service(ModelAdmin, request, queryset):
    platinum_customers = []
    silver_customers = []
    gold_customers = []
    message = ''
    for customer in queryset:
        if feat_list() <= 11:
            customer.Service_Level = Service.objects.get(service_name = 
                'Silver Package')
            silver_customers.append(customer.Name)
        elif feat_list() > 11 and feat_list() <= 15:
            customer.Service_Level = Service.objects.get(service_name = 
               'Gold Package')
            gold_customers.append(customer.Name)
        else:
             customer.Service_Level = Service.objects.get(service_name = 
                'Platinum Package')
            platinum_customers.append(customer.Name)
        customer.save()
        if platinum_customers:
            message = 'The following customers are now Platinum Customers: 
                {}'.format(', '.join(platinum_customers))
        if silver_customers:
            message = 'The following customers are now Silver Customers: 
                {}'.format(', '.join(silver_customers))
        if gold_customers:
            message = 'The following customers are now Gold Customers: 
                {}'.format(', '.join(gold_customers))
        if not platinum_customers and not silver_customers and not 
            gold_customers:
            message = 'No customer changes made!'
        ModelAdmin.message_user(request, message, level=SUCCESS)
allocate_service.short_description = 'Allocate Service'

客户管理员如下：

@admin.register(models.Customer)
class CustomerAdmin(admin.ModelAdmin):
    icon = '<i class="material-icons">account_box</i>'
    list_display = ('Customer_ID', 'Name', 'Gender', 'Nationality', 
        'Account_Type', 'Salary', 'Balance', 'Service_Level')
    list_per_page = 20
    list_filter = ('Nationality', 'Gender')
    actions = [allocate_service]

这里的问题是，当我尝试运行操作时，出现此错误：

ValueError: invalid literal for int() with base 10: '4941" class="action-select'

Answer 1

您将整数与字符串混合并覆盖模型值。

elif customer.Age == '36 - 59':
    customer.Age = 1

模型不能表示字符串'36 - 59'和整数1。

相反，您应该将这些值作为自己的变量进行跟踪，例如：

def education(ModelAdmin, request, queryset):
    education = 0
    if customer.Education == 'Highschool and below':
        education = 0
    else:
        education = 1
    return education

这可以缩短为

def education(ModelAdmin, request, queryset):
    if customer.Education == 'Highschool and below':
        return 0
    else:
        return 1

最后，如果您能够更改数据库架构，则可能需要考虑使用 choice fields 而不是字符串来存储这些值。