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August 29, 2015 14:05
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| ## create a RObject wrapped array of user models | |
| users = new RObject [ | |
| { id: 'a', name: 'Rob' } | |
| { id: 'b', name: 'Bob' } | |
| { id: 'c', name: 'Jack' } | |
| { id: 'd', name: 'Jill' } | |
| ] | |
| ## create a RObject wrapped array of blog models | |
| blogs = new RObject [ | |
| { title: 'How to a', creatorId: 'a' } | |
| { title: 'How to c', creatorId: 'c' } | |
| { title: 'How to b', creatorId: 'b' } | |
| ] | |
| ## convert list of models into an object keyed by id | |
| usersById = users.indexBy('id') | |
| ## create a new array of blog models that | |
| ## include a full user model looked up by creatorId | |
| richBlogs = blogs.map (blog) -> | |
| blog.extend { creator: usersById.prop(blog.prop('creatorId')) } | |
| ## as expected, the 'How to c' blog has a full user object with username and all | |
| richBlogs.at(1).prop('creator').prop('name') # == Jack | |
| ## change the blog author id of 'How to c' to Jills id | |
| blogs.at(1).prop('creatorId').set('d') | |
| ## when the user id was changed, the full creator was automatically updated to Jills user object | |
| richBlogs.at(1).prop('creator').prop('name') # == Jill | |
| ## change a users name | |
| usersById.prop('d').prop('name').set('Leroy') | |
| ## the full user here is also automatically updated | |
| richBlogs.at(1).prop('creator').prop('name') # == Leroy | |
| ## add a new blog with a creator that doesn't exist | |
| blogs.push { title: 'One weird trick', creatorId: 'e' } | |
| ## accessing that creator gives null right now | |
| richBlogs.at(3).prop('creator').prop('name') # == null | |
| ## create a new user with the same id as the one of the blog we just created | |
| usersById.push { id: 'e', name: 'ZZ-top' } | |
| ## the full user model is automatically added to the blog based on id | |
| richBlogs.at(3).prop('creator').prop('name') # == ZZ-top |
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