How to instruct Jackson to serialize a field inside an Object instead of the Object it self?
Check out @JsonValue annotation. EDIT: like this: class ItemType { @JsonValue public String name; public int somethingElse; }
serialization
What’s the most space-efficient way to compress serialized Python data?
I’ve done some test using a Pickled object, lzma gave the best compression. But your results can vary based on your data, I’d recommend testing them with some sample data of your own. Mode LastWriteTime Length Name —- ————- —— —- -a—- 9/17/2019 10:05 PM 23869925 no_compression.pickle -a—- 9/17/2019 10:06 PM 6050027 gzip_test.gz -a—- 9/17/2019 … Read more
django REST framework – limited queryset for nested ModelSerializer?
In your View Set you may specify the queryset like follows: from rest_framework import serializers, viewsets class MyModelSerializer(serializers.ModelSerializer): class Meta: model = MyModel class MyModelViewSet(viewsets.ModelViewSet): queryset = MyModel.objects.all()[:500] serializer_class = MyModelSerializer I think what you are looking for is the SerializerMethodField. So your code would look as follows: class ContainerSerializer(serializers.ModelSerializer): items = SerializerMethodField(‘get_items’) class Meta: … Read more
How to add to a serialized array
You can pass a class to serialize: class User < ActiveRecord::Base serialize :recent_messages, Array end The above ensures that recent_messages is an Array: User.new #=> #<User id: nil, recent_messages: [], created_at: nil, updated_at: nil> Note that you might have to convert existing fields if the types don’t match.
Deserialize millisecond timestamp to java.time.Instant
Solution was to add .configure(DeserializationFeature.READ_DATE_TIMESTAMPS_AS_NANOSECONDS, false) to the ObjectMapper. Complete ObjectMapper looks like: ObjectMapper om = new ObjectMapper() .registerModule(new JavaTimeModule()) .configure(SerializationFeature.WRITE_DATE_TIMESTAMPS_AS_NANOSECONDS, false) .configure(SerializationFeature.FAIL_ON_EMPTY_BEANS, false) .configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false) .configure(DeserializationFeature.READ_DATE_TIMESTAMPS_AS_NANOSECONDS, false) .setSerializationInclusion(Include.NON_NULL);
Make a custom .NET Exception serializable
Base implementation, without custom properties SerializableExceptionWithoutCustomProperties.cs: namespace SerializableExceptions { using System; using System.Runtime.Serialization; [Serializable] // Important: This attribute is NOT inherited from Exception, and MUST be specified // otherwise serialization will fail with a SerializationException stating that // “Type X in Assembly Y is not marked as serializable.” public class SerializableExceptionWithoutCustomProperties : Exception { public … Read more
Converting serialized form’s data to json object
Change your statement var formData = JSON.parse($(“#floorplan-form”).serializeArray()); with var formData = JSON.stringify(jQuery(‘#frm’).serializeArray()); // store json string or var formData = JSON.parse(JSON.stringify(jQuery(‘#frm’).serializeArray())) // store json object
Use class name as root key for JSON Jackson serialization
By adding the jackson annotation @JsonTypeInfo in class level you can have the expected output. i just added no-changes in your class. package com.test.jackson; import org.codehaus.jackson.map.ObjectMapper; import org.codehaus.jackson.map.SerializationConfig; import com.fasterxml.jackson.annotation.JsonTypeInfo; import com.fasterxml.jackson.annotation.JsonTypeInfo.As; import com.fasterxml.jackson.annotation.JsonTypeInfo.Id; @JsonTypeInfo(include=As.WRAPPER_OBJECT, use=Id.NAME) public class MyPojo { // Remain same as you have } output: { “MyPojo”: { “id”: 4 } }
Serializing Lists of Classes to XML
Just to check, have you marked Bar as [Serializable]? Also, you need a parameter-less ctor on Bar, to deserialize Hmm, I used: public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void button1_Click(object sender, EventArgs e) { Foo f = new Foo(); f.BarList = new List<Bar>(); f.BarList.Add(new Bar { Property1 = … Read more
Jackson JSON serialization, recursion avoidance by level defining
I recently encountered a similar problem: Jackson – serialization of entities with birectional relationships (avoiding cycles) So the solution is to upgrade to Jackson 2.0, and add to classes the following annotation: @JsonIdentityInfo(generator = ObjectIdGenerators.IntSequenceGenerator.class, property = “@id”) public class SomeEntityClass … This works perfectly.