Question

我的'@angular/platform-browser'中有一个自定义验证功能，用于检查两个参数（mrange，mthreshold）。验证功能检查在发布时只需要设置其中一个参数。

# check base diectory provided exists
[ -e "$1" ] || {
    printf "\nError: invalid path. \n\n"
    exit 1
}

# find the files in base directory, sort them and filter out uniques, and iterate over the resulting list of files
# note: we're only filtering .json files here

for name in `find $1 -type f -printf "%f\n" | sort | uniq -d`; 
do  
    # we keep count of the duplicate files for a file to keep track of the last file(biggest in size)
    numDups=$(find $1 -name $name | wc -l); # number of duplicates found for a given file

for file in $(find $1 -name $name | sort -h); # sort the files again on basis of size
do

  if [ $numDups -ne 1 ];
  then
    if [ "$option" = -d ] # remove the duplicate file
    then
      rm $file
    else
      echo $file # if -d is not provided, just print the duplicate file names
      # note: this will print only the duplicate files, and not the latest/biggest file
    fi      
  fi
  numDups=$(($numDups-1))
  # note: as per current code, we are checking options value for each duplicate file
  # we can move the if conditions out of the for loop, but that would need duplication of code
  # we may try modifying the script otherwise, if we see serious performance issues.
  done
done;

exit 0;

在我的views.py文件中

DataSerliazer

目前，我必须编写anthor class DataSerializer(serializers.ModelSerializer): emails = serializers.ListField(child = serializers.EmailField()) class Meta: model = AIData fields = ('id', 'name', 'created', 'username', 'token', 'expression','key','threshold' ,'evaluator', 'range','emails','metric_name', 'status') def validate(self,attrs): mrange = attrs.get("metric_range") mthreshold = attrs.get("metric_threshold") if (mrange == None or mrange == " ") and (mthreshold == None or mthreshold == " "): raise serializers.ValidationError({'error': 'Cannot have both range and threshold empty'}) elif mrange != None and mthreshold != None: raise serializers.ValidationError({'error': 'Cannot set both range and threshold'})，以便它不会隐式调用DataSerializer中的validate函数。这是为了避免在对象创建期间检查2个参数。一旦创建了对象，我就不想再检查相同的功能了。有没有更简洁的方式做同样的事情？我最好避免为同一型号编写2个Serializer。

Answer 1

据我所知，rest-framework库没有这样的东西。

我这样做是为了覆盖__init__并添加你自己的变量来检查它。

class DataSerializer(serializers.ModelSerializer):
    emails = serializers.ListField(child = serializers.EmailField())
    class Meta:
        model = AIData
        fields = ('id', 'name', 'created', 'username', 'token',
                  'expression','key','threshold' ,'evaluator', 'range','emails','metric_name', 'status')

    def __init__(self, *args, **kwargs):
        super(DataSerializer, self).__init__(*args, **kwargs)
        self._request_method = kwargs.get('request_method', 'GET')

    def validate(self,attrs):
        if self._request_method == 'GET':
            # GET logic
        elif self._request_method in ('PUT', 'POST'):
            # Put or Post logic

然后我会像这样使用它：

serializer = DataSerializer(ai, request_method=request.method)

Answer 2

您可以将context data传递给可能包含请求本身的序列化程序。

您可以通过调用self.context来随时随地访问序列化程序中的上下文。

此解决方案确实可以更轻松地提供上下文数据，而无需覆盖__init__。

Django Rest框架：HTTP POST和PUT的不同验证

2 个答案: