我怎样才能像 manytomanyfield 一样在外键数据的 django 管理下拉列表中进行多选？

Question

models.py

from django.db import models

class Images(models.Model):

    def upload_path(instance, filename):
        return '/images/'.join([filename])

    image = models.ImageField(upload_to=upload_path, blank=True, null=True)
    logits = models.BinaryField()
    #customer = models.ForeignKey(Customer ,on_delete=models.DO_NOTHING, default=None)

class Customer(models.Model):
    customer_id = models.BigIntegerField(unique=True)
    first_name = models.CharField(max_length=300)
    last_name = models.CharField(max_length=300)
    images = models.ForeignKey(Images ,on_delete=models.DO_NOTHING, default=None)
    def __str__(self):
        return str(self.customer_id)

我的问题是我希望能够将多个图像分配给单个用户，这应该是可能的，因为 ForeignKey 但我似乎无法像那样工作。

我想要多选字段，就像在 manytomanyfield 中一样，但在外键字段中。

Answer 1

My problem is [I] want to be able to assign multiple images to [a] single user which should be possible because of ForeignKey but [I] don't seem to get it to work like that.

否：一个ForeignKey是一个many-to-one关系：这意味着 many Customers 可以引用一个，可能是相同的，单个 Images。如果你想使用多个 Image，那么你需要将 ForeignKey 写在相反的方向，所以：

from django.db import models

class Image(models.Model):

    def upload_path(instance, filename):
        return f'/images/{filename}'

    image = models.ImageField(upload_to=upload_path, blank=True, null=True)
    logits = models.BinaryField()
    <strong>customer</strong> = models.ForeignKey(
        <strong>'Customer'</strong>,
        on_delete=models.SET_NULL,
        null=True,
        <strong>related_name='images'</strong>
    )

class Customer(models.Model):
    customer_id = models.BigIntegerField(unique=True)
    first_name = models.CharField(max_length=300)
    last_name = models.CharField(max_length=300)
    
    def __str__(self):
        return f'{self.customer_id}'

我怎样才能像 manytomanyfield 一样在外键数据的 django 管理下拉列表中进行多选？

How can i multiselect in django admin dropdown on foreignkey data just like manytomanyfield?

django

django-models

django-rest-framework