Question

我想加入两个模型，如下所示，并且加入的对象应该仅是Harsha到Bank（而不是Bank到Harsha）

model.py

class Harsha(models.Model):

    name = models.CharField(max_length=255)
    email = models.CharField(max_length=255)


class Bank(models.Model):

    user = models.ForeignKey(Harsha, on_delete=models.CASCADE)
    accountnumber = models.BigIntegerField()
    ifsc = models.CharField(max_length=255)
    branch = models.CharField(max_length=255)
    bank = models.CharField(max_length=255)

views.py

test = Harsha.objects.all()
test1 = Bank.objects.all() # its working for me but i want join from Harsha table

在模板中

# I want this
{% for tes in test %}
    {{ tes.name }}
    {{ tes.email }}
    {{ tes.bank.accountnumber }}  # how can I get this field
    {{ tes.bank.ifsc }}  # how can I get this field
{% endfor %}

# its working
{% for tes in test1 %}
    {{ tes.user.name }}
    {{ tes.user.email }}
    {{ tes.accountnumber }}
    {{ tes.ifsc }}
{% endfor %}

Answer 1

您可以这样获得（使用reverse relationship）：

{% for tes in test %}
    {{ tes.name }}
    {{ tes.email }}
    {% for bank in tes.bank_set.all %}
    {{ bank.accountnumber }}  
    {{ bank.ifsc }}  
    {% endfor %}
{% endfor %}

Django使用ORM基于联接从数据库中获取数据

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