docs/serialization.md
# Serialization
It's possible to obtain a serialized object of a Structure using the method `toJSON()`. This method is also compliant with the [`JSON.stringify()`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/JSON/stringify) specification, so you can use it to serialize your object too.
**Important:**
- Be aware that `toJSON()` will return an object, not the JSON in form of a string like `JSON.stringify()` does
- Refer to the [Date#toJSON](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Date/toJSON) specification to see how dates will be serialized by `JSON.stringify`
- Refer to [Dealing with nullable attributes](schema-concept/nullable-attributes.md#nullability-and-serialization) to check how `nullables` are going to be returned on **Serialization**
```javascript
const Book = attributes({
name: String
})(class Book { });
const User = attributes({
name: String,
birth: Date,
books: {
type: Array,
itemType: Book
}
})(class User { });
const user = new User({
name: 'John Something',
birth: new Date('10/10/1990'),
books: [
new Book({ name: 'The name of the wind' }),
new Book({ name: 'Stonehenge' })
]
});
user.toJSON(); /* {
name: 'John Something',
birth: new Date('10/10/1990'),
books: [
{ name: 'The name of the wind' },
{ name: 'Stonehenge' }
]
}
*/
JSON.stringify(user)); // {"name":"John Something","birth":"1990-10-10T03:00:00.000Z","books":[{"name":"The name of the wind"},{"name":"Stonehenge"}]}
```