String null to empty string in JSON

src/document/serializers.py

@@ -14,6 +14,11 @@ class DocumentSerializer(serializers.ModelSerializer):
         model = models.Document
         fields = ('uploaded_by', 'uploaded_at', 'name', 'description', 'file', 'uploaded_by_name', 'solution', )
 
+    def to_representation(self, instance):
+        data = super().to_representation(instance)
+        if not data['file']: data['file']= ""
+        return data
+
     def get_uploaded_by_name(self, obj):
         return obj.uploaded_by.full_name
 

src/stats/serializers.py

@@ -37,6 +37,13 @@ class NoteSerializer(serializers.ModelSerializer):
     created_by = serializers.HiddenField(default=CurrentUserProfileDefault())
     created_by_name = serializers.SerializerMethodField()
 
+    def to_representation(self, instance):
+        data = super().to_representation(instance)
+        if not data['event']: data['event']= ""
+        if not data['profile']: data['profile']= ""
+        
+        return data
+
     class Meta:
         model = models.Note
         fields = '__all__'