python - Django Serializer 仅为父类对象返回 JSON 并保留子对象相同？

Question

我有这些模型:

class Projects(models.Model):
    projectName =models.CharField(max_length = 100,unique=True,db_index=True)
    projectManager = EmbeddedModelField('Users')

class Teams(models.Model):
    teamType = models.CharField(max_length =100)
    teamLeader = EmbeddedModelField('Users')
    teamProject = EmbeddedModelField('Projects')

class Users(models.Model):
    name = models.CharField(max_length = 100,unique=True)
    designation = models.CharField(max_length =100 )
    teams = ListField(EmbeddedModelField('Teams'))

我需要从我的 View 中为所有与用户和团队有进一步关系的项目对象返回 JSON。我的 views.py 有这段代码

from django.core import serializers

data = serializers.serialize('json', Projects.objects.all())

此输出 JSON 仅为项目对象，不会像这样为 USer 对象返回 JSON

[{"pk": "4eb3b7d0e814520db4000000", "model": "RESTAPI.projects", "fields": {"projectName": "HELLO", "projectManager": "Users object"}}]

如何将 User 对象也转换为 JSON？

Answer 1

我前段时间遇到过这个问题，I created a snippet to help me out :

def get_values(instance, go_into={}, exclude=(), extra=()):
    """
    Transforms a django model instance into an object that can be used for
    serialization. Also transforms datetimes into timestamps.

    @param instance(django.db.models.Model) - the model in question
    @param go_into - relations with other models that need expanding
    @param exclude - fields that will be ignored
    @param extra - additional functions/properties which are not fields

    Usage:
    get_values(MyModel.objects.get(pk=187),
               {'user': {'go_into': ('clan',),
                         'exclude': ('crest_blob',),
                         'extra': ('get_crest_path',)}},
               ('image'))

    """

所以你可以使用这样的东西:

simplejson.dumps(get_values(Projects.objects.all(),
    go_into={'projectManager': {'go_into': 'teams'}}))

免责声明:我为自己的目的制作了脚本；它可能并不完美，可能需要进一步修改以满足您自己的需求。