serialization

问题 I am trying to serialize a class, expected behaviour is that it succeeds. It does not succeed with error in the title. The title is a subset of the error as the full one will not fit. Here is the full error: System.Text.Json.JsonException HResult=0x80131500 Message=A possible object cycle was detected which is not supported. This can either be due to a cycle or if the object depth is larger than the maximum allowed depth of 5. I have a pretty simple model that I am unable to serialize and the

问题 So I got the following ValueQuerySet records = Maintenance.objects.values('failure').annotate(fcount=Count('failure')) Out[13]: <QuerySet [{'failure': 'Bend Pin', 'fcount': 2}, {'failure': 'Winding Failure', 'fcount': 2}, {'failure': 'Degraded Capacitor', 'fcount': 2}]> I tried serializing this with Django's serializer; from django.core import serializers serializers.serialize('json', records, fields('failure', 'fcount')) AttributeError: 'dict' object has no attribute '_meta' I know I can

问题 So I got the following ValueQuerySet records = Maintenance.objects.values('failure').annotate(fcount=Count('failure')) Out[13]: <QuerySet [{'failure': 'Bend Pin', 'fcount': 2}, {'failure': 'Winding Failure', 'fcount': 2}, {'failure': 'Degraded Capacitor', 'fcount': 2}]> I tried serializing this with Django's serializer; from django.core import serializers serializers.serialize('json', records, fields('failure', 'fcount')) AttributeError: 'dict' object has no attribute '_meta' I know I can

问题 Someone told me That Serialization was not the best way to send things over a socket but they said they read that in a book once and was not sure of a better way cause they haven't really done networking before. so is Serialization the best way or is there a better way. Also this is for a game if that makes much of a difference. What i see by searching questions about sending objects over it looks like most people use Serialization but im just checking to see what people thing 回答1: To

问题 Someone told me That Serialization was not the best way to send things over a socket but they said they read that in a book once and was not sure of a better way cause they haven't really done networking before. so is Serialization the best way or is there a better way. Also this is for a game if that makes much of a difference. What i see by searching questions about sending objects over it looks like most people use Serialization but im just checking to see what people thing 回答1: To

问题 From the Javadoc of ObjectInputStream: Enum constants are deserialized differently than ordinary serializable or externalizable objects. The serialized form of an enum constant consists solely of its name; field values of the constant are not transmitted. To deserialize an enum constant, ObjectInputStream reads the constant name from the stream; the deserialized constant is then obtained by calling the static method Enum.valueOf(Class, String) with the enum constant's base type and the

问题 This is json {"name":"david","age":14,"gender":"male"} This is python class class Person: def __init__(self): self.name = None self.age = None self.gener = None self.language = None this is Code #deserialize func~~~~~ print person.name #prints david print person.age #prints 14 print person.gender #prints male print person.language #prints "None" Can I deserialize Json to class in Python(like C# Newtonsoft) Thank you. 回答1: You can use it with the json.loads() method. You would also need to

问题 This is json {"name":"david","age":14,"gender":"male"} This is python class class Person: def __init__(self): self.name = None self.age = None self.gener = None self.language = None this is Code #deserialize func~~~~~ print person.name #prints david print person.age #prints 14 print person.gender #prints male print person.language #prints "None" Can I deserialize Json to class in Python(like C# Newtonsoft) Thank you. 回答1: You can use it with the json.loads() method. You would also need to

问题 This question already has answers here : How to use class fields with System.Text.Json.JsonSerializer? (2 answers) Closed 1 year ago . Environment: Visual Studio 2019 16.3.8, .NET 3.0.100, .NET Core 3.0 unit test. All 3 calls below to System.Text.Json.JsonSerializer.Serialize return empty objects: "{}" I must be doing something wrong ... but I just don't see it? public class MyObj { public int myInt; } [TestMethod] public void SerializeTest() { var myObj = new MyObj() { myInt = 99 }; var txt1

问题 I'm developing a mobile application backend with Django 1.9.1 I implemented the follower model and now I want to list all of the followers of a user but I'm currently stuck to do that. I also use Django Rest Framework. This is my UserProfile model class UserProfile(models.Model): # Linking UserProfile to User model. user = models.OneToOneField(User) city = models.CharField(null=True, max_length=30, blank=True) gender = models.CharField(null=True, max_length=10, blank=True) # m for male, f for