React native DRF:如何在json中将多对多字段连接成字符串
models.pyReact native DRF:如何在json中将多对多字段连接成字符串,react-native,django-rest-framework,expo-cli,React Native,Django Rest Framework,Expo Cli,models.py class SalesPerson(models.Model): name = models.CharField(max_length=50) office = models.ForeignKey(Location, on_delete=models.SET_NULL, null=True) class Project(models.Model): title = models.CharField(max_length=50) leader
class SalesPerson(models.Model):
name = models.CharField(max_length=50)
office = models.ForeignKey(Location, on_delete=models.SET_NULL, null=True)
class Project(models.Model):
title = models.CharField(max_length=50)
leader = models.ForeignKey(SalesPerson, on_delete=models.SET_NULL, null=True,related_name='leader')
location = models.ForeignKey(Location, on_delete=models.SET_NULL, null=True)
product = models.ManyToManyField(Product)
sales_person = models.ManyToManyField(SalesPerson)
序列化程序.py
class ProjectSerializer(serializers.ModelSerializer):
leader_name= serializers.ReadOnlyField(source='leader.name')
location_name= serializers.ReadOnlyField(source='location.name')
product = serializers.SlugRelatedField(read_only=True, slug_field='name', many=True)
sales_person = serializers.SlugRelatedField(read_only=True, slug_field='name', many=True)
class Meta:
model = Project
fields = ('id', 'title', 'leader_name', 'location_name', 'product', 'sales_person')
class SPSerializer(serializers.ModelSerializer):
projects = ProjectSerializer(many=True, read_only=True, source='project_set')
office_name= serializers.ReadOnlyField(source='office.city')
class Meta:
model = SalesPerson
fields = ('id', 'name', 'office_name', 'email', 'projects')
结果:
{
"id": 2,
"name": "Angela",
"office_name": "NSW Sydney",
"email": "angela@angela.com",
"projects": [
{
"id": 1,
"title": "Mall Orchid",
"leader_name": "Boris",
"product": [
"Split wall mounted"
],
"sales_person": [
"Angela",
"Boris",
"David"
],
},
{
"id": 6,
"title": "Mall Petunia",
"leader_name": "Boris",
"product": [
"Split duct"
],
"sales_person": [
"Angela",
"Boris",
"David"
],
},
]
},
我将使用react native来使用json
我知道如何迭代“项目”
但是,我希望避免迭代“sales_person”以简化数组的渲染
所以我确信我必须把销售人员编成一个字符串,但今天在谷歌上搜索了好几个小时后,我找不到答案
如果可能的话,我希望在Django Rest框架中而不是在Expo React Native中这样做
简而言之,我想得出这样的结果:
{
"id": 2,
"name": "Angela",
"office_name": "NSW Sydney",
"email": "angela@angela.com",
"projects": [
{
"id": 1,
"title": "Mall Orchid",
"leader_name": "Boris",
"product": [
"Split wall mounted"
],
"sales_person": "Angela", "Boris", "David",
},
{
"id": 6,
"title": "Mall Petunia",
"leader_name": "Boris",
"product": [
"Split duct"
],
"sales_person": "Angela", "Boris", "David",
},
]
},
非常感谢您的帮助。我找到了答案
我写这封信是为了我自己将来的参考
class ProjectSerializer(serializers.ModelSerializer):
leader_name= serializers.ReadOnlyField(source='leader.name')
location_name= serializers.ReadOnlyField(source='location.city')
product = serializers.SlugRelatedField(read_only=True, slug_field='name', many=True)
sales_person = serializers.SerializerMethodField('get_sales_person')
class Meta:
model = Project
fields = ('id', 'title', 'leader_name', 'location_name', 'product', 'sales_person')
def get_sales_person(self, obj):
return ', '.join([sales_person.name for sales_person in obj.sales_person.all()])