normalizr

Description:

normalizr

normalizr · #
Simple package for json normalization just like normalizr.
About #
Many APIs, public or not, return JSON data that has deeply nested objects. Using data in this kind of structure is often very difficult.
Normalizr is a small, but powerful utility for taking JSON with a schema definition and returning nested entities with their IDs, gathered in dictionaries.
Links #
Pub dev
Documentation
Issue tracker
Usage #
Example input json
{
"id": "123",
"author": {"id": "1", "name": "Paul"},
"title": "My awesome blog post",
"comments": [
{
"id": "324",
"commenter": {"id": "2", "name": "Nicole"}
}
]
}
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Normalize:
import 'package:normalizr/normalizr.dart';
import 'dart:convert';

// Define a users schema
final user = Entity('users');

// Define your comments schema
final comment = Entity('comments', {
'commenter': Ref('users'),
});

// Define your article
final article = Entity('articles', {
'author': Ref('users'),
'comments': Ref.list('comments'),
});

void main() {
// setup
normalizr.addAll([user, comment, article]);

final data = ... // some json

// normalize json data
final normalizedData = normalize(data, article);
// output
final encoder = JsonEncoder.withIndent(' ');
String prettyJson = encoder.convert(normalizedData);
print(prettyJson);
}
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output:
{
"result": "123",
"type": "articles",
"entities": {
"users": {
"1": {
"id": "1",
"name": "Paul"
},
"2": {
"id": "2",
"name": "Nicole"
}
},
"comments": {
"324": {
"id": "324",
"commenter": "2"
}
},
"articles": {
"123": {
"id": "123",
"author": "1",
"title": "My awesome blog post",
"comments": [
"324"
]
}
}
}
}
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Features and bugs #
Please file feature requests and bugs at the issue tracker.