使用Django rest框架时更改字段名称 [英] Changing the field name when using Django rest framework

问题描述

我正在将序列化的数据从Django rest框架馈送到网站上的Javascript数据透视表。如果我有一个名为 created_on的变量，则DRF会将其用作字段名称。我想在数据透视表中显示的标签将被转换为创建时间。

I'm feeding serialized data from the Django rest framework to a Javascript pivot table on my site. If I have a variable called 'created_on', the DRF uses that as the field name. What I want to display in my pivot table is the label which will be converted to 'Created On'.

例如，我从DRF发出的输出如下：

As an example, my output from DRF is the following:

[{"created_on": "2016-04-23"}, {"created_on": "2016-05-23"}]

我想要的是：

[{"Created on": "2016-04-23"}, {"Created on": "2016-05-23"}]

在不覆盖序列化过程的情况下是否有可能？

Is this possible without me overriding the serialization process?

推荐答案

否（当前）在不覆盖序列化过程的情况下是不可能的。

No, its not possible (currently) without overriding the serialization process.

为什么不可能？

这是因为您要用于 created_on 的备用名称包含空格，并且无法在序列化程序中定义包含空格的字段。另外，当前没有功能为序列化过程中使用的字段提供备用名称。

This is because the alternate name which you want to use for created_on contains whitespace and its not possible to define a field in your serializer having whitespaces in it. Also, there is no functionality currently to provide alternate name for a field to be used in serialization process.

可能的解决方案：

您可以覆盖序列化程序的 to_representation（）方法，并在其中添加 Created On 键，其值等于 created_on 键的值。然后所有序列化的对象将包含一个键创建于。

You can override the to_representation() method of your serializer and there add a Created On key having value equal to the value of created_on key. Then all the serialized objects will contain a key Created On.

class MySerializer(serializers.ModelSerializer):

    ...

    def to_representation(self, obj):
        primitive_repr = super(MySerializer, self).to_representation(obj)
        primitive_repr['Created On'] = primitive_repr['created_on']
        return primitive_repr  

如果备用名不包含空格怎么办？

如果备用名之间没有空格，您然后可以将 SerializerMethodField（）与 source 参数一起使用。

Had the alternate name did not contain any spaces between them, you could then have used SerializerMethodField() with source argument.

您本可以执行以下操作：

You could have done something like:

class MySerializer(serializers.ModelSerializer):

    alternate_name = serializers.SerializerMethodField(source='created_on')

    class Meta:
        model = MyModel
        fields = (.., 'alternate_name')

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