django序列化时使用外键的真实值

展示:

普通情况下序列化得到的外键的内容仅仅是id:

...
{
fields:
{
uat_date: "2015-07-25",
statu: "CG",
name: "慢赢优化",
tester: [
1
],
product_manager: 1,
module: [
2,
3
],
project: 1,
plan_version: 1,
publish_date: "2015-07-25",
actual_version: 1,
type: "XQ",
developer: [
1
]
},
model: "amazingTable.content",
pk: 1
}
...

序列化时得到外键的真实值:

...
{
fields:
{
uat_date: "2015-07-25",
statu: "CG",
name: "慢赢优化",
tester:
[
[
"kevin"
]
],
product_manager:
[
"kevin"
],
module:
[
[
"closewebbus",
"我是描写叙述"
],
[
"xckhapp",
"我是描写叙述"
]
],
project: 1,
plan_version: 1,
publish_date: "2015-07-25",
actual_version: 1,
type: "XQ",
developer: [
[
"kevin"
]
]
},
model: "amazingTable.content",
pk: 1
}
...

方法:

我序列化的是Content表。它含有一个外键关联的是Module表。1对多

我要先序列化Module表,然后序列化Content表的时候才干够使用到Module的真实值

class ModuleManager(models.Manager):
def get_by_natural_key(self, name, description):
return self.get(name = name, description = description) class Module(models.Model):
objects = ModuleManager()
name = models.CharField(max_length=100, unique=True)
description = models.CharField(max_length=100, blank=True, null=True) # natual_key的序列化
def natural_key(self):
return (self.name, self.description) # natual_keys的解序列化
class Meta:
unique_together = (('name', 'description'),)

序列化是否使用真实值:

jsons = serializers.serialize('json', queryset,use_natural_foreign_keys=False)

jsons = serializers.serialize('json', queryset,use_natural_foreign_keys=True)

附:

假设要给Content表序列化,那么要使用到外键的actual_key,要保证外键先序列化,例如以下依赖:

class Content(models.Model):
name = models.CharField(max_length=100)
...
module = models.ManyToManyField('Module') def natural_key(self):
return (self.name,) + self.module.natural_key()
# 和"def"同缩进
natural_key.dependencies = ['example_app.module']
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