[英]Get List of related objects - Django Queryset
如何使用django的queryset从MyUser表中获取用户列表,其中UserBankTransaction表中的transaction_paid为False?
class UserBankTransaction(models.Model):
user = models.ForeignKey(MyUser)
plaid_transaction_id = models.CharField(max_length=300, unique=True)
charge_amount = models.DecimalField(max_digits=10, decimal_places=2)
account_id = models.CharField(max_length=300)
location_name = models.CharField(blank=True, max_length=300)
roundup_amount = models.DecimalField(max_digits=10, decimal_places=2, null=True)
transaction_date = models.DateField()
transaction_paid = models.BooleanField(default=False)
created_date = models.DateTimeField(auto_now=False, auto_now_add=True)
class MyUser(AbstractBaseUser):
username = models.CharField(max_length=255,unique=True,)
email = models.EmailField(verbose_name='email address',max_length=255,unique=True)
first_name = models.CharField(max_length=120,null=True,blank=True,)
last_name = models.CharField(max_length=120,null=True, blank=True,)
created = models.DateTimeField(auto_now_add=True, null=True, blank=True)
updated = models.DateTimeField(auto_now=True, null=True, blank=True)
使用向后关系查询将执行以下操作:
MyUser.objects.filter(userbanktransaction_set__transaction_paid=False)
如果要检索用户ID列表:
UserBankTransaction.objects \
.filter(transaction_paid=False)\
.values_list('user', flat=True)
如果要检索用户对象列表:
MyUser.objects.filter(userbanktransaction_set__transaction_paid=False)
或者你可以指定一个related_name
在UserBankTransaction.user
:
class UserBankTransaction(models.Model):
user = models.ForeignKey(MyUser, related_name='bank_transactions')
那么您只需执行以下操作:
MyUser.objects.filter(bank_transactions__transaction_paid=False)
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