All That Jazz
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The document introduces JazzRecord, an ORM inspired by ActiveRecord for Rails, which supports various platforms and includes core features such as finders, validation, and associations. It outlines the creation of models, including associated models, and demonstrates methods for finding and manipulating records, as well as implementing validations and callbacks. Additionally, it discusses future developments for JazzRecord, highlighting the need for contributors and the project's ongoing evolution to accommodate asynchronous operations.
![Validation Errors p = Programmer.newRecord({name: 42, income: "spare change"});p.save(); //false p.errors.name ["You must have a name!"]p.errors.income ["We will gladly pay you null salary"]p.name = "Nick"; p.income = null;p.isValid() //true](https://image.slidesharecdn.com/allthatjazz-090428150217-phpapp01/85/All-That-Jazz-9-320.jpg)
![Association Preloading, Postloading - Defaulted to 1 level deep - Can be overridden at global level or per query - Immediately associated records loaded automatically - Additional records loaded with call to load(assocName) var milesRecords = miles.albums; //all of Miles' albums milesRecords.length //3 milesRecords[0].titlemilesRecords[0].load("artist") //miles again](https://image.slidesharecdn.com/allthatjazz-090428150217-phpapp01/85/All-That-Jazz-10-320.jpg)
![Project: www.jazzrecord.org groups.google.com/group/jazzrecord http://github.com/thynctank/jazzrecord/tree/master Me: thynctank.com [email_address] thynctank (AIM/GTalk/IRC/etc)](https://image.slidesharecdn.com/allthatjazz-090428150217-phpapp01/85/All-That-Jazz-14-320.jpg)
All That Jazz
- 1. All That Jazz An intro to Databases with JazzRecord ORM
- 2. A Little About JazzRecord - Library agnostic (originally a MooTools project) - ORM inspired by ActiveRecord in Rails. Most behaviors directly portable. - Current Platforms: - Gears - AIR - Titanium PR1 (and beta thanks to @jhaynie!)
- 3. Core Features - Finders - Validation - Association loading - Preloading - Post load - Fixtures and Migrations
- 4. Creating Models - Basics var JazzLegend = new Model({ table: "jazz_legends", columns: { name: "text", primary_instrument: "text", years_active: "text" } });
- 5. Creating Models - Associations //new version of JazzLegend model JazzLegend = new JazzRecord.Model({ table: "jazz_legends", foreignKey: "jazz_legend_id", hasMany: {albums: "albums"}, columns: { name: "text", primary_instrument: "text", years_active: "text" } }); //associated model Album = new JazzRecord.Model({ table: "albums", belongsTo: {artist: "jazz_legends"}, columns: { title: "text", year: "text", jazz_legend_id: "number" } });
- 6. Finders and Record Data var miles = JazzLegend.findBy("name", "Miles"); var louis = JazzLegend.first(); var dizzy = JazzLegend.find(2); miles.primary_instrument //trumpet louis.years_active //1914-1971miles.name = "Miles Dewey Davis III"; miles.save();
- 7. Finders and Record Data - Destroy dizzy.destroy(); //someone must've grown tired of Dizzy! Album.count(); //3 albums so far, all Miles Album.destroyAll(); //like that time you lost all your CDs// when your car was broken into... Album.count(); //0, no more Miles!!
- 8. Validations var Programmer = new JazzRecord.Model({ //... validate: { atSave: function() { this.validatesIsString("name", "You must have a name!"); this.validatesIsFloat("income", "We will gladly pay you a null salary!"); } } }); - Callbacks run at time of create or save (or both) - Several built in validators (based on Rails') - Write your own
- 9. Validation Errors p = Programmer.newRecord({name: 42, income: "spare change"});p.save(); //false p.errors.name ["You must have a name!"]p.errors.income ["We will gladly pay you null salary"]p.name = "Nick"; p.income = null;p.isValid() //true
- 10. Association Preloading, Postloading - Defaulted to 1 level deep - Can be overridden at global level or per query - Immediately associated records loaded automatically - Additional records loaded with call to load(assocName) var milesRecords = miles.albums; //all of Miles' albums milesRecords.length //3 milesRecords[0].titlemilesRecords[0].load("artist") //miles again
- 11. Autolinking miles.albums.push( Album.newRecord({title: "made up ish", year: 2009 }) );miles.save(); Any record objects pushed into a hasMany array or pushed directly onto a hasOne/belongsTo property will be auto linked on save of the base record object.
- 12. Auto Unlinking miles.albums.pop() //so long, fake albummiles.save(); Any records that were previously associated/loaded which are removed become dissociated on save of base record object
- 13. Future of JazzRecord - Unavoidable Asynchronous - HTML5 Difficulties, deeply nested structures - Will open up webOS, iPhone, async in AIR/Titanium - Everything callback-based - Initial work in 1 or 2 weeks - no association preloading - No timetable for full preloading - Need Contributors : coders, docs translators
- 14. Project: www.jazzrecord.org groups.google.com/group/jazzrecord http://github.com/thynctank/jazzrecord/tree/master Me: thynctank.com [email_address] thynctank (AIM/GTalk/IRC/etc)
- 15. JazzFusion BYOM (bring your own model)
- 16. Rails inspired, but dead simple Provide a series of controllers, view templates and helper code in a standard file structure and sit back to watch it work. Initially targeting browsers, AIR, Titanium Info on writing your own routing mechanism (remote templates, server-generated dynamic content) Info on writing your own view template parsers. Out of box will allow inline script tags + simple string substitution, and/or markdown
- 17. Some Nice Features AppController's features inherited across all Controller objects Automatic Hijax for forms/links, passing data to router Before/after filters for keeping code DRY
- 18. When? Maybe June. That Burning Question