Question

我看到了有关此错误的一些主题，但是找不到答案。

这是我的错误：

django.db.utils.IntegrityError: NOT NULL constraint failed: domain_analyse_practice.header_id

我不太明白为什么会发生此错误。

我的模型。py：

class Header(models.Model):
    name = models.CharField(max_length=40, null=False)
    description = models.CharField(max_length=500, null=False)


class Practice(models.Model):
    nature = models.CharField(max_length=10, null=False)
    value = models.CharField(max_length=300, null=False)
    further = models.CharField(max_length=50, null=True, blank=True)
    header = models.ForeignKey(Header, on_delete=models.CASCADE)

    def value_cleaner(self):
        self.value = self.value.replace("‘","'").replace("’", "'")

    def __init__(self, *args, **kwargs):
        super(Practice, self).__init__()
        self.value_cleaner()

这是我的init_db.py脚本，它负责填充数据库：

def init_practice_db(filename):
with open('config/' + filename, newline='') as csv_file:
    reader = csv.reader(csv_file, delimiter=',', quotechar='|')
    i = 0
    for row in reader:
        if i != 0:
            # Not the header row
            header_name = row[0]
            # Select the header in database with header name
            header = Header.objects.get(name=header_name)
            further = None
            nature = row[1].rstrip()
            value = row[2].rstrip()
            if row[3] != "None":
                further = further
            Practice.objects.create(nature=nature, value=value, further=further, header=header)
        i += 1

如果缺少某些信息，请告诉我:) 谢谢您的回答。

Answer 1

您没有将任何参数传递给super(Practice, self).__init__()。试试这个

class Practice(models.Model):

    ...

    def __init__(self, *args, **kwargs):
        super(Practice, self).__init__(*args, **kwargs)
        self.value_cleaner()

django.db.utils.IntegrityError：NOT NULL约束失败。约束在哪里不被尊重？

1 个答案: