Intro to Realm React Native

Intro to Realm React Native, presented during the London React Native Community http://www.meetup.com/London-React-Native-Community/events/230142668/

Transcript

1. Realm A new way to persist & query data on React Native Nabil Hachicha @nabil_hachicha
2. Realm +
3. AsyncStorage getItem(key, callback)
 
 setItem(key, value /* string */, callback)
 
 removeItem(key, callback)
 
 // etc.
4. SQLite SELECT * 
 FROM persons p
 INNER JOIN persons c ON c.parent_id = p.id ORDER BY name
5. Realm is a mobile database hundreds of millions of people rely on
6. +
7. class Person {
 ...
 }
 
 Person.schema = {
 name: 'Person',
 properties: {
 name: 'string',
 birthday: ‘date'
 }
 }; Realm is not an ORM
8. // Query results are computed lazily
 let people = realm.objects('Person');
 
 
 
 
 
 

9. // Query results are computed lazily
 let people = realm.objects('Person');
 
 // and can be filtered
 people = people.filtered('birthday < $0', date);
 
 
 

10. // Query results are computed lazily
 let people = realm.objects('Person');
 
 // and can be filtered
 people = people.filtered('birthday < $0', date); 
 // and sorted
 people = people.sorted('name');

11. Models
12. Models Basic Property
13. Models Basic Property Object Property
14. Models Basic Property Object Property List Property
15. Basic Property Types • bool => Boolean • int, float, double => Number • string => String • data => ArrayBuffer • date => Date
16. Object Properties Many-to-One
17. List Properties Many-to-Many
18. Optional Properties
19. Default Property Values
20. Indexed Properties
21. Primary Keys
22. Writes
23. Writes All changes to an object (addition, modification & deletion) must be done within a write transaction.
24. Creating Objects
25. Updating Objects
26. Deleting Objects
27. Query
28. Query
29. Filtering
30. Filtering
31. Auto-Updating Results
32. Change Events
33. ListView Integration import { ListView } from 'realm/react-native';
 
 // - Same API as React.ListView
 // - Optimized for Realm collections

34. Encryption
35. Under The Hood
36. Multi-Version-Concurrency-Control
37. Multi-Version-Concurrency-Control
38. Multi-Version-Concurrency-Control
39. • Zero-Copy Architecture • Bitpacking reduces memory usage by up to 90% • Caching & Vectorization makes access faster than native C • Universal data representation from multiple languages
40. Inserts Counts Queries Realm SQLite
41. Open Source on https://github.com/realm/realm-js
42. npm install realm https://realm.io https://github.com/realm/realm-js @realm help@realm.io
43. Thank You! @nabil_hachicha https://realm.io/jobs