我在Django rest框架中有序列化程序如下:
class StateSerializer(serializers.ModelSerializer):
kilometers = Field(source='mileage')
pictures = StatePictureSerializer(many=True, read_only=True)
class Meta:
model = Inspection # Options
fields = ('kilometers', 'inspection_date', 'pictures')
StatePictureSerializer
如下:
class StatePictureSerializer(serializers.ModelSerializer):
blob_url = Field(source='public_url')
class Meta:
model = Inspection_Picture
fields = ('blob_url', )
结果我得到如下内容:
{
"kilometers": 64431,
"inspection_date": null,
"pictures": [
{"blob_url": "path/to/photo"},
{"blob_url": "path/to/photo"},
{"blob_url": "path/to/photo"},
{"blob_url": "path/to/photo"},
{"blob_url": "path/to/photo"}
]
}
因此,pictures
是一个对象数组。
我想要的是一个字符串数组,例如:
"pictures": ["path/to/photo", "path/to/photo", "path/to/photo", "path/to/photo", "path/to/photo"]
知道怎么做吗?
修改
Inspection
模型如下:
class Inspection(models.Model):
customerReference = models.CharField(max_length=50, blank=True, null=True)
extraReference = models.CharField(max_length=50, blank=True, null=True)
itemReference = models.IntegerField(blank=True, null=True)
vehicle = models.ForeignKey(to=Vehicle)
mileage = models.IntegerField()
timeStamp = models.DateTimeField(auto_now_add=True)
inspection_date = models.DateTimeField(null=True)
features = models.ManyToManyField(to=Feature)
pictures = models.ManyToManyField(to=Images, through="Inspection_Picture")
damages = models.ManyToManyField(to=Damage)
parts = models.ManyToManyField(to=Part)
checks = models.ManyToManyField(to=CheckType, through=Inspection_Check)
featuresFlat = models.ManyToManyField(to=FeatureFlat, through=Inspection_FeatureFlat)
Images
模型如下:
class Images(models.Model):
"""Model for storing uploaded photos"""
filename = models.CharField(max_length=255)
extension = models.CharField(max_length=40)
key_data = models.CharField(max_length=90, unique=True, blank=True, null=True)
upload_date = models.DateTimeField(auto_now_add=True)
upload_identification = models.CharField(max_length=50, blank=True, null=True)
url = models.CharField(max_length=1024, blank=True, null=True)
stored = models.BooleanField(default=False)
thumbnailed = models.BooleanField(default=False)
thumbnailed_treated = models.BooleanField(default=False)
protected = models.BooleanField(default=False)
source = models.CharField(max_length=50, blank=True, null=True)
@property
def key_generate(self):
"""returns a string based unique key with length 80 chars"""
while 1:
key = str(random.getrandbits(256))
try:
Images.objects.get(key=key)
except:
return key
def __unicode__(self):
return self.upload_identification
def public_url(self):
return settings.AZURE_URL_FULL + self.url
答案 0 :(得分:5)
我认为在你的情况下SerializerMethodField
将是一个正确的选择,如下所示。以下代码中可能存在<field_name>
不匹配。请按照您的型号进行操作。我假设基于上面的序列化器的字段名称。
class StateSerializer(serializers.ModelSerializer):
kilometers = Field(source='mileage')
pictures = serializers.SerializerMethodField('get_pictures')
class Meta:
model = Inspection # Options
fields = ('kilometers', 'inspection_date', 'pictures')
def get_pictures(self, obj):
return [each.public_url() for each in obj.pictures.all() ]