Python Django Rest框架外键嵌套

我正在尝试将Users表嵌套到Relationships表中。因此，与此相反：

[
    {
        "user": 1,
        "related_user": 2,
        "relationship": "followed_by"
    }
]

我正在努力做到这一点：

[
    {
        "user": {
            "username": "user1",
            "name": "User 1",
            "email": "bla",
            "phone": "bla",
            "date_joined": "2017-11-01T21:34:13.101256Z"
         },
        "related_user": {
            "username": "user2",
            "name": "User 2",
            "email": "bla",
            "phone": "bla",
            "date_joined": "2017-11-01T21:34:13.101256Z"
         },
        "relationship": "followed_by"
    }
]

我查阅了教程，尝试添加

serializers.RelatedField、UserSerializer（many=true，read-only=true）

等，但没有任何效果

Models.py

class User(models.Model):
    username = models.CharField(max_length=255)
    name = models.CharField(max_length=255)
    email = models.CharField(max_length=255)
    phone = models.CharField(max_length=255)
    date_joined = models.DateTimeField(auto_now_add=True, blank=True)

    def __str__(self):
        return str(self.pk) + ", " + self.username


RELATIONSHIP_CHOICE = [
    ("follows", "follows"),
    ("followed_by", "followed_by"),
    ("none", "none"),
]

class Relationship(models.Model):
    user = models.ForeignKey(User, related_name="primary_user", null=True)
    related_user = models.ForeignKey(User, related_name="related_user", null=True)
    relationship = models.CharField(max_length=40, choices=RELATIONSHIP_CHOICE, default=RELATIONSHIP_CHOICE[0])

序列化程序.py

from rest_framework import serializers
from . import models

class UserSerializer(serializers.ModelSerializer):
    class Meta:
        model = models.User
        fields = (
            'username',
            'name',
            'email',
            'phone',
            'date_joined',
        )


class RelationshipSerializer(serializers.ModelSerializer):
    related_user = UserSerializer(many=True)

    class Meta:
        model = models.Relationship
        fields = (
            'user',
            'related_user',
            'relationship',
            'related_user'
        )

我试图将相关用户添加到我的序列化程序中，但没有成功。我收到一个错误：“用户”对象不可编辑

感谢您的帮助

class RelationshipSerializer(serializers.ModelSerializer):
    user = UserSerializer(read_only=True)
    related_user = UserSerializer(read_only=True)

    class Meta:
        model = models.Relationship
        fields = (
            'user',
            'related_user',
            'relationship'
        )

---

user=UserSerializer（read\u only=True，many=True）

用于manytomy字段，

user=UserSerializer（read\u only=True）

用于ForeignKey字段。

效果非常好！我想知道如何才能使某些字段出现，例如，我不想向用户显示电子邮件。我如何做到这一点？据我所知，最简单、最有效的方法是将

UserSerializer

替换为

UserWithoutEmailSerializer