Question

我正在将产品目录从<?php $date = date("08:00"); for($i=1; $i<=10; $i++) { $date = strtotime("+".$i." hour"); echo date('H:i A', $date); } ?>文件上传到以下数据库模型中的 models.py

csv

views.py

class Product(models.Model):
   name = models.CharField(max_length=50)
   invoice_date = models.DateField(blank=True, null=True)

以下是示例 csv文件数据

def load_product(relative_path):
    if relative_path is not None:
        with open(os.path.join(BASE_DIR, relative_path)) as f:
            reader = csv.reader(f)
            for row in reader:
                if row[0] != 'id':
                    _, created = Product.objects.get_or_create(
                        name=row[1],
                        invoice_date=datetime.datetime.strptime(str(row[2]), "%d-%m-%Y").strftime("%Y-%m-%d")
                    )
    else:
        return "Please enter a relative file name from data folder."

我的一些书id,name,invoice_date ,sample book1,26-10-2007 ,sample book2,15-10-2010 ,sample book3,22-09-2017, ,sample book4,, ,sample book5,,所以我想插入无类型（或空），这就是为什么我在don't have invoice_date中创建blank=True, null=True，但它没有插入null当我使用shell执行方法时，给出了以下错误的错误

models.py

Django - 不插入null并生成ValueError

0 个答案: