serialization

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

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

问题 I am getting CRAZY trying to use a Json Serializer/Deserializer in my Class Library and import my Assembly in SQL Server. I am working with a WebAPI that response Json string , and I want to create CLR Sql Procedure that call that API and use the api result. I tried 2 ways to Deserialize Json string : 1) System.Web.Script.Serialization 2) System.Runtime.Serialization.Json First one get me this error : Assembly 'system.web.extensions, version=4.0.0.0, culture=neutral, publickeytoken

问题 I am getting CRAZY trying to use a Json Serializer/Deserializer in my Class Library and import my Assembly in SQL Server. I am working with a WebAPI that response Json string , and I want to create CLR Sql Procedure that call that API and use the api result. I tried 2 ways to Deserialize Json string : 1) System.Web.Script.Serialization 2) System.Runtime.Serialization.Json First one get me this error : Assembly 'system.web.extensions, version=4.0.0.0, culture=neutral, publickeytoken

问题 I have a class that contains a List of DynamicObjects. I have a unit test that confirms that the Newtonsoft Json Serializer/Deserializer handles this correctly. However, the default OData Json Serializer/Deserializer does not. I implemented my own ODataEdmTypeDeserializer like this: public class JsonODataEdmTypeDeserializer : ODataEdmTypeDeserializer { public JsonODataEdmTypeDeserializer(ODataPayloadKind payloadKind) : base(payloadKind) { } public JsonODataEdmTypeDeserializer(ODataPayloadKind

问题 I have a class that contains a List of DynamicObjects. I have a unit test that confirms that the Newtonsoft Json Serializer/Deserializer handles this correctly. However, the default OData Json Serializer/Deserializer does not. I implemented my own ODataEdmTypeDeserializer like this: public class JsonODataEdmTypeDeserializer : ODataEdmTypeDeserializer { public JsonODataEdmTypeDeserializer(ODataPayloadKind payloadKind) : base(payloadKind) { } public JsonODataEdmTypeDeserializer(ODataPayloadKind

问题 If I have a dataset each record of which is a case class, and I persist that dataset as shown below so that serialization is used: myDS.persist(StorageLevel.MERORY_ONLY_SER) Does Spark use java/kyro serialization to serialize the dataset? or just like dataframe, Spark has its own way of storing the data in the dataset? 回答1: Spark Dataset does not use standard serializers. Instead it uses Encoders , which "understand" internal structure of the data and can efficiently transform objects

问题 If I have a dataset each record of which is a case class, and I persist that dataset as shown below so that serialization is used: myDS.persist(StorageLevel.MERORY_ONLY_SER) Does Spark use java/kyro serialization to serialize the dataset? or just like dataframe, Spark has its own way of storing the data in the dataset? 回答1: Spark Dataset does not use standard serializers. Instead it uses Encoders , which "understand" internal structure of the data and can efficiently transform objects

问题 I'm trying to serialize a dictionary within a class and the keys inside the CustomAttributes dictionary are getting formatted even though I've provided the ProcessDictionaryKeys parameter as false. I've added [JsonProperty] as shown below: [JsonProperty(NamingStrategyType = typeof(SnakeCaseNamingStrategy), NamingStrategyParameters = new object[] { false, false })] public IDictionary<string, string> CustomAttributes { get; set; } my CustomAttributes data looks like this: CustomAttributes = new

问题 I've noticed that if I have some variables exposed to the Unity inspector such as: [SerializeField] GameObject _tickIcon; If I leave them unassigned and try to use the null conditional operator and call a method on that object I get an exception saying the variable is not assigned. So basically instead of doing this: _tickIcon?.SetActive(false); It's forcing me to do this: if(_tickIcon != null) { _tickIcon.SetActive(false) } So I'm guessing this must be something specific to unity's runtime,