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JSON:API Document

JSON:API is a specification for building APIs in JSON. This library implements the Document model and a Parser.

Document model

The Document is a set of Dart classes describing the main JSON:API objects: Resources and Resource Identifiers, Primary Data, Relationships, etc. Use it to produce a valid JSON:API Document.

Put the following code to hello_world.dart:

import 'dart:convert';

import 'package:json_api_document/json_api_document.dart';

main() {
  final message =
      ResourceObject('messages', '1', attributes: {'text': 'Hello world'});
  final primaryData =
      ResourceData(message, self: Link(Uri.parse('/messages/1')));

  final doc = Document(primaryData);


Now execute:

dart hello_world.dart

It will produce the following output (formatted for clarity):

  "data": {
    "attributes": {
      "text":"Hello world"
  "links": {


The Parser converts parsed JSON objects to Documents.

Put this code to hello_world_parse.dart:

import 'dart:convert';
import 'dart:io';

import 'package:json_api_document/parser.dart';

void main() async {
  // Read the json from the standard input
  final jsonString = await stdin.transform(Utf8Decoder()).join();

  // Convert the json to a Dart object
  final jsonObject = json.decode(jsonString);

  // Parse the object into a document
  final doc = JsonApiParser().parseResourceDocument(jsonObject);

  // Print the attributes, v) => print('$k: $v'));

Now let's run them together feeding the output of the first program to the second:

dart hello_world.dart | dart hello_world_parse.dart

This will output the parsed attributes:

text: Hello world

Please refer to the example and test folders for usage examples.