This a simple package to mapping a json object.

npm install typescript-json-object-mapper

yarn add typescript-json-object-mapper

To work with decorators, you need first enable emitDecoratorMetadata y experimentalDecorators on you tsconfig.json. Example:

{ "compilerOptions": { "emitDecoratorMetadata": true, "experimentalDecorators": true } }

This example tries to show all possible cases in which you might need to use this utility.

class UserView extends JsonView { @JsonProperty username: string; @JsonProperty({ ignore: true }) password: string; @JsonProperty({ topic: 'custom' }) birthday: string; @JsonProperty({ topic: 'custom2' }) phone: string; }

const json = { username: "annon", password: "12345678", birthday: "1992-03-20", phone: "+0123456789" };

const serialized = JsonObjectMapper.serialize(json, UserView).toString();

results:

{ username: "annon", birthday: "1992-03-20", phone: "+0123456789" }

const serialized = JsonObjectMapper.serialize(json, UserView, ['custom']).toString();

results:

{ username: "annon", birthday: "1992-03-20" }

const serialized = JsonObjectMapper.serialize(json, UserView, ['custom', 'custom2']).toString();

results:

{ username: "annon", birthday: "1992-03-20", phone: "+0123456789" }

• No-Initiation(Using only reference to class)
• Renaming properties
• Change data types
  • to Date
    • from String using Date.parse
    • from Integer using Date
  • to Integer
    • from String using Number
  • to Float
    • from String using Number
  • to Boolean
  • to String
  • to Object
• Sub-Views(Recursivity)
  • Array sub-views
  • Single sub-view
• Date values(String, Number, Date)
• Serialize from Object Array
• Serialize from Object
• Serialize from String
• Property Topic's

This function always return Serialization object. And can using it with data as Array or Object.

// from Array JsonObjectMapper.serialize([ { email: "john.smith@example.com", password: "123456" }, { email: "john.smith@example.com", password: "123456" }, { email: "john.smith@example.com", password: "123456" } ], UserView); // from Object JsonObjectMapper.serialize({ email: "john.smith@example.com", password: "123456" }, UserView);

This method return a string representation of object.

This method return a json object representation.