serialization

问题 I'm trying to deserialize [{"foo": "1", "bar": false}, {"foo": "2", "bar": false}] into List<(string, bool)> type: JsonConvert.DeserializeObject<List<(string foo, bool bar)>>(json) But always get a list of default values - (null, false) . How can I achieve correct deserializing? P.S. I'm not interested in any model/class for that purpose. I need exactly value tuple instead. 回答1: The C# tuple feature was created to represent sets of values, not entities. The names of the values are like the

问题 I have the following situation: //--class user -- private .... @OneToMany(targetEntity = UserRoles.class, mappedBy = "iduser", fetch = FetchType.LAZY) @JsonManagedReference private List<UserRoles> userRoleList = new ArrayList<>(); @OneToOne(targetEntity = Login.class, cascade = CascadeType.ALL) @JoinColumn(name = "iduser", referencedColumnName = "iduser") @JsonManagedReference private Login login; @ManyToMany(fetch = FetchType.EAGER, cascade = CascadeType.ALL) @JoinTable(name = "n_gruppi_user

问题 Weirdly, I found several times there's difference when running with spark-submit vs running with spark-shell (or zeppelin), though I don't believe it. With some codes, spark-shell (or zeppelin) can throw this exception, while spark-submit just works fine: org.apache.spark.SparkException: Task not serializable at org.apache.spark.util.ClosureCleaner$.ensureSerializable(ClosureCleaner.scala:345) at org.apache.spark.util.ClosureCleaner$.org$apache$spark$util$ClosureCleaner$$clean(ClosureCleaner

问题 I am trying to use google cloud natural language API for analyzing entity sentiments. from google.cloud import language_v1 import os os.environ['GOOGLE_APPLICATION_CREDENTIALS'] = 'path/to/json' client = language_v1.LanguageServiceClient() text_content = 'Grapes are good. Bananas are bad.' # Available types: PLAIN_TEXT, HTML type_ = language_v1.Document.Type.PLAIN_TEXT # Optional. If not specified, the language is automatically detected. # For list of supported languages: # https://cloud

问题 I am trying to use google cloud natural language API for analyzing entity sentiments. from google.cloud import language_v1 import os os.environ['GOOGLE_APPLICATION_CREDENTIALS'] = 'path/to/json' client = language_v1.LanguageServiceClient() text_content = 'Grapes are good. Bananas are bad.' # Available types: PLAIN_TEXT, HTML type_ = language_v1.Document.Type.PLAIN_TEXT # Optional. If not specified, the language is automatically detected. # For list of supported languages: # https://cloud

问题 I am trying to use google cloud natural language API for analyzing entity sentiments. from google.cloud import language_v1 import os os.environ['GOOGLE_APPLICATION_CREDENTIALS'] = 'path/to/json' client = language_v1.LanguageServiceClient() text_content = 'Grapes are good. Bananas are bad.' # Available types: PLAIN_TEXT, HTML type_ = language_v1.Document.Type.PLAIN_TEXT # Optional. If not specified, the language is automatically detected. # For list of supported languages: # https://cloud

问题 I have a list of a class which I serialize to the designer generated code with the following code: internal class TargetSettingsConverter : TypeConverter { public override bool CanConvertTo(ITypeDescriptorContext context, Type destinationType) { return destinationType == typeof(InstanceDescriptor) || base.CanConvertTo(context, destinationType); } public override object ConvertTo(ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType) { if (destinationType ==

问题 I have a list of a class which I serialize to the designer generated code with the following code: internal class TargetSettingsConverter : TypeConverter { public override bool CanConvertTo(ITypeDescriptorContext context, Type destinationType) { return destinationType == typeof(InstanceDescriptor) || base.CanConvertTo(context, destinationType); } public override object ConvertTo(ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType) { if (destinationType ==

问题 I can get the user in my serializer? For example I have this serializer: serializers.py class ClientSearchSerializer(serializers.ModelSerializer): client = serializers.SlugRelatedField( many=False, queryset=Client.objects.filter(user=????), slug_field='id' ) I can filter my queryset from SlugRelatedField? 回答1: CurrentUserDefault should work for you. Documentation: http://www.django-rest-framework.org/api-guide/validators/#currentuserdefault Please note: In order to use this, the 'request'

问题 I can get the user in my serializer? For example I have this serializer: serializers.py class ClientSearchSerializer(serializers.ModelSerializer): client = serializers.SlugRelatedField( many=False, queryset=Client.objects.filter(user=????), slug_field='id' ) I can filter my queryset from SlugRelatedField? 回答1: CurrentUserDefault should work for you. Documentation: http://www.django-rest-framework.org/api-guide/validators/#currentuserdefault Please note: In order to use this, the 'request'