Django-Rest-Framework - How to serialize queryset from an unrelated model as nested serializer
我正在尝试根据父模型的某些条件(而不是外键)向现有序列化程序添加嵌套序列化程序。用例是返回一个带有"researchtemplate"对象数组的"research"对象,该数组通过对postgres arrayfield进行筛选来标识。
模型
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 | class Research(TimeStampedModel): category = models.CharField(max_length=100, choices=RESEARCH_TEMPLATE_CATEGORIES, default='quote') body = models.CharField(max_length=1000, blank=True, default='') #The body of text comprising the nugget additionaldata = JSONField(null=True) # all the varying values to be merged into a wrapper def __str__(self): return self.body class Meta: ordering = ('created',) class ResearchTemplate(TimeStampedModel): template = models.TextField(blank=True, default='') category = models.CharField(max_length=100, choices=RESEARCH_TEMPLATE_CATEGORIES, default='quote') mergefields = ArrayField(models.CharField(max_length=200), blank=True) def save(self, *args, **kwargs): merges = re.findall("{{(.*?)}}", self.template) #get all the template names from within the mustaches self.mergefields = list(set(merges)) #TODO: Make Unique super(TimeStampedModel, self).save(*args, **kwargs) def __str__(self): return self.wrapper class Meta: ordering = ('created',) |
串行器
1 2 3 4 5 6 7 8 9 10 11 12 13 14 | class ResearchSerializer(serializers.ModelSerializer): templates = ResearchTemplateSerializer(many=True) class Meta: model = Research fields = ('id', 'created', 'speaker', 'body', 'templates') class ResearchTemplateSerializer(serializers.RelatedField): def get_queryset(self, values): return ResearchTemplate.objects.filter(mergefields__contained_by=['django']) #This must an array of keys from the Research object's JSON field class Meta: model = ResearchTemplate fields = ('id', 'template') |
我已经能够在有外键映射的情况下嵌套序列化程序,但是无法使用自定义查询集进行嵌套。也许我没有正确地思考这个问题,我需要在研究模型上建立某种形式的"关系"领域。
如何用父模型中指定的值嵌套从筛选器返回的所有行的序列化列表?
您可以使用DRF的
将您的
然后将您的
1 2 3 4 5 6 7 8 9 10 11 | class ResearchSerializer(serializers.ModelSerializer): templates = serializers.SerializerMethodField() class Meta: model = Research fields = ('id', 'created', 'speaker', 'body', 'templates') def get_templates(self, obj): values = obj.get_values() # whatever your filter values are. obj is the Research instance templates = ResearchTemplate.objects.filter(mergefields__contained_by=values) # Or whatever queryset filter return ResearchTemplateSerializer(templates, many=True).data |