9/1/2023 0 Comments Serialized![]() ![]() # Serializes an attribute value to a string that will be stored in the database. Serialize the preferences attribute using a custom coder class Rot13JSON Serialize the preferences Hash using YAML class User < ActiveRecord::Base Serialize the preferences attribute using JSON class User < ActiveRecord::Base Otherwise, the default will be nil.Įxamples Serialize the preferences attribute using YAML class User < ActiveRecord::Base If this option is not passed, the previous default value (if any) will be used. :default - The default value to use when no value is provided. The dump method may return nil to serialize the value as NULL. The attribute value must respond to to_json.Ĭustom coder - The attribute value will be serialized using the coder's dump(value) method, and will be deserialized using the coder's load(string) method. JSON - The attribute value will be serialized as JSON. Hash - The attribute value will be serialized as YAML, but an empty Hash will be serialized as NULL. The attribute value must respond to to_yaml.Īrray - The attribute value will be serialized as YAML, but an empty Array will be serialized as NULL. May be one of the following:ĭefault - The attribute value will be serialized as YAML. ParametersĪttr_name - The name of the attribute to serialize.Ĭlass_name_or_coder - Optional. There is no need to use serialize in this case.įor more complex cases, such as conversion to or from your application domain objects, consider using the ActiveRecord::Attributes API. For instance: json and jsonb types in PostgreSQL will be converted between JSON object/array syntax and Ruby Hash or Array objects transparently. Keep in mind that database adapters handle certain serialization tasks for you. ![]() The serialization format may be YAML, JSON, or any custom format using a custom coder class. Remoting uses serialization to pass objects "by value" from one computer or application domain to another.If you have an attribute that needs to be saved to the database as a serialized object, and retrieved by deserializing into the same object, then specify the name of that attribute using this method and serialization will be handled automatically. You can serialize an object to a stream, to a disk, to memory, over the network, and so forth. For example, you can share an object between different applications by serializing it to the Clipboard. This type of serialization is useful for preserving the state of an object between different invocations of an application. SOAP is likewise an open standard, which makes it an attractive choice.īinary serialization preserves type fidelity, which means that the complete state of the object is recorded and when you deserialize, an exact copy is created. Because XML is an open standard, it is an attractive choice for sharing data across the Web. This is useful when you want to provide or consume data without restricting the application that uses the data. ![]() ![]() XML and SOAP serialization serializes only public properties and fields and does not preserve type fidelity. JSON is an open standard that is an attractive choice for sharing data across the web. JSON serialization serializes only public properties and does not preserve type fidelity. NET features the following serialization technologies: Together, these processes allow data to be stored and transferred. The complement of serialization is deserialization, which converts a stream into an object. Serialization is the process of converting the state of an object into a form that can be persisted or transported. ![]()
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