DRF所有序列化器类都继承了BaseSerializer 类, 通过重写该类的 to_representation() 和to_internal_value()方法可以改变序列化和反序列化的行为,比如给序列化后的数据添加额外的数据,或者对客户端API请求携带的数据进行反序列化处理以及用来自定义序列化器字段。 to_representation() 允许我们改变序列化的输出。 to_i...
3.2、重写 to_representation 方法说明:前面我们也讲了,所有字段的显示,其实就是在 to_representation方法里面,那我们在 to_representation 方法重新定义 gender字段不就可以了。这样既支持序列化,也可以支持反序列化。1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 from rest_framework import serializers from ....
A floating point representation. Corresponds to django.db.models.fields.FloatField. Signature: FloatField(max_value=None, min_value=None) max_value Validate that the number provided is no greater than this value. ...
在DRF中，过滤功能允许开发者根据特定的参数筛选数据集。通常，我们可以通过`filter_queryset`方法自定义过滤逻辑，也可以使用`Serializer`的`to_representation`方法进行条件过滤。这些方法为API提供了高度的灵活性和定制性，使得开发者可以根据具体业务需求构建出功能丰富的API接口。排序功能则是让API返回的数...
The confusion matrix is a powerful tool that provides a clear visual representation of a model’s performance by showing the true positives, true negatives, false positives, and false negatives. This allows researchers to assess how well the model distinguishes between different classes, enabling ...
authors = models.ManyToManyField(to='Author') def __str__(self): return self.name class Author(models.Model): nid = models.AutoField(primary_key=True) name = models.CharField(max_length=32) age = models.IntegerField() author_datail = models.OneToOneField(to='AuthorDatail', to_field='...
Figure 1 shows a visual representation of this concept. The part defines position and profile tolerances with respect to a datum reference frame through basic dimensions. Figure 2. The tolerance zones (profile and position – in red) are defined with respect to the datum reference frame (DRF ...
Thanks @kotepillar for raising the issue (#25) and @Crocmagnon for the idea of delaying field modification to to_representation(). 0.7.5 (February 2020) Simplifies declaration of expandable_fields If using a tuple, the second element - to define the serializer settings - is now optional. ...
5)使用关联对象的序列化器 6) 重写to_representation方法 many参数
We're ready to create our API now. Here's our project's rooturls.pymodule: fromdjango.conf.urlsimporturl,includefromdjango.contrib.auth.modelsimportUserfromrest_frameworkimportrouters,serializers,viewsets# Serializers define the API representation.classUserSerializer(serializers.HyperlinkedModelSerializer...