我正在做一个django项目,使用mysql作为数据库,我必须从另一个数据库获取一些数据来填充django数据库表的一些字段
我的学生django模型是这样的:
class Student(models.Model):
#user = models.OneToOneField(User)
email = models.EmailField(blank=True, null=True)
email_verified = models.BooleanField(blank=True)
mobile = models.CharField(max_length=11, unique=True, blank=True, null=True)
mobile_verified = models.BooleanField(blank=True)
nickname = models.CharField(max_length=20, blank=True, null=True)
gender = models.PositiveSmallIntegerField(choices=GENDER_CHOICES,
null=True, blank=True)
level = models.PositiveSmallIntegerField(choices=STUDENT_LEVELS_CHOICES,
null=True, blank=True)
source = models.PositiveSmallIntegerField(choices=SOURCE_SITE, blank=True, null=True)
register_at = models.DateTimeField(blank=True, null=True)
enroll_at = models.DateTimeField(blank=True, null=True)
state = models.PositiveSmallIntegerField(choices=STUDENT_MAINTAIN_STATE, blank=True, null=True)
is_company_user = models.BooleanField(blank=True)
company_name = models.CharField(max_length=40, blank=True, null=True)
importance = models.PositiveSmallIntegerField(choices=IMPORTANCE_STATE, blank=True, null=True)
feature = models.PositiveSmallIntegerField(choices=USER_FEATURE, blank=True, null=True)
description = models.CharField(max_length=1000, blank=True, null=True)
sales = models.ForeignKey(User)
remaining = models.IntegerField(blank=True, null=True)#订单余额
last_state_change_time = models.DateTimeField(blank=True, null=True)
is_delete = models.BooleanField(blank=True, default=False)
objects = StudentManager()
def __unicode__(self):
return self.nickname
我写了一个py脚本从另一个数据库传输数据,脚本是:
import MySQLdb
try:
conn = MySQLdb.connect(host='localhost', user='root', passwd='', db='a')
cur = conn.cursor()
cur.execute('select * from student;')
res = cur.fetchall()
cur.close()
conn.close()
conn = MySQLdb.connect(host='localhost', user='root', passwd='', db='b')
cur = conn.cursor()
for item in res:
if item:
cur.execute('insert into student_student (email, email_verified, mobile, mobile_verified, nickname, gender, level, register_at) values (%s, %s, %s, %s, %s, %s, %s, %s);', (item[3], item[4], item[1], item[2], item[7], item[8], item[6], item[14]))
conn.commit()
cur.close()
conn.close()
except MySQLdb.Error, e:
print "Mysql Error %d: %s" % (e.args[0], e.args[1])
我的目标是将数据从“a”读取到“b”,b的某个字段可能为空(因为a中只有几个字段适合b)。运行脚本时,出现以下错误:
Mysql错误1452:无法添加或更新子行:外键约束失败(crm.student_student,constraint sales_refs_id_6e3649f6 foreign key(sales_id)REFERENCES auth_user(id))
怎么解决这个问题?
我把我的存储引擎改成了innodb,但它不起作用,请不要否决我的问题,我真的需要你的帮助。
sales = models.ForeignKey(User)
字段不为空,但是在插入时,您没有为student_student.sales_id
提供任何值。提供sales_id
或将blank=True
和null=True
添加到该字段相关问题 更多 >
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