重新格式化Django REST Framework序列化器以获取输出 [英] Reformat Django REST Framework Serializer to get Output
本文介绍了重新格式化Django REST Framework序列化器以获取输出的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我正在尝试获取特定格式的数据,但我无法获得所需的输出。
I am trying to get data in a particular format but i'm not able to get the desired output.
我的模型:
class Category(models.Model):
name = models.CharField(max_length=40)
class Expense(models.Model):
category = models.ForeignKey(Category, on_delete=models.CASCADE, related_name="category_name")
description = models.CharField(max_length=200)
total_amount = models.IntegerField()
class Expense_Details(models.Model):
expense = models.ForeignKey(Expense, on_delete=models.CASCADE, related_name="payment")
user = models.IntegerField()
amount = models.FloatField()
type = models.CharField(max_length=100) ---->type is owe or lend
当我请求 / api / expenses /
:
Expected Output
{
"total_expenses": 10,
"Expenses":
[{
"id": 1,
"category": 1,
"created_by": 1, ------> user logged id
"description": "lunch",
"total_amount": "105",
"owe": [{
"user_id": 1,
"amount": 10
},
{
"user_id": 2,
"amount": 95
}],
"lend": [{
"user_id": 3,
"amount": 10
},
{
"user_id": 4,
"amount": 95
}],
}, ...
]
}
我的输出:
{
"results": [
{
"id": 1,
"category": 1,
"description": "lunch at the burj al arab",
"total_amount": 105,
"payment": [
{
"user": 1,
"amount": -10
},
{
"user": 2,
"amount": -95
},
{
"user": 3,
"amount": 10
},
{
"user": 4,
"amount": 95
}
]
}
]
}
我的序列化器:
class ExpenseDetailsSerializer(serializers.ModelSerializer):
class Meta:
model = Expense_Details
fields = ['user', 'amount']
class ExpenseSerializer(serializers.ModelSerializer):
payment = serializers.SerializerMethodField()
def get_payment(self, obj):
return ExpenseDetailsSerializer(obj.payment.all(), many=True).data
class Meta:
model = Expense
fields = ['id', 'category', 'description', 'total_amount', 'payment',]
我应该使用什么查询来获得上述格式的输出?我的序列化程序将如何显示?如何分隔自己
和 lend
?另外,我还存储了自己的货币并借以 +
和-
符号来区分它们。
What Query should I use to get Output in the above format? How will my serializer look like? How can I separate own
and lend
? Also I have stored own and lend with +
and -
sign to differentiate between them.
推荐答案
使用 ListField
进行相同操作。
文档: https://www.django-rest- framework.org/api-guide/fields/#listfield
Also refer How to serialize an 'object list' in Django REST Framework
在这里您可以尝试以下操作:
Here you can try something like:
class ExpenseSerializer(serializers.Serializer):
payment = serializers.ListField(child=ExpenseDetailsSerializer())
def get_payment(self, obj):
return ExpenseDetailsSerializer(obj.payment.all(), many=True).data
class Meta:
model = Expense
fields = ['id', 'category', 'description', 'total_amount', 'payment',]
这篇关于重新格式化Django REST Framework序列化器以获取输出的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!
查看全文