3
Can anyone tell me how to best relate data using HTML 5’s Indexed Databases? I’ve seen many examples of how the API works, but in none of them have I seen data being related. For example, what relationships would look like 1:N... 1:1... N:N...
3
Can anyone tell me how to best relate data using HTML 5’s Indexed Databases? I’ve seen many examples of how the API works, but in none of them have I seen data being related. For example, what relationships would look like 1:N... 1:1... N:N...
0
I recommend using Google lib for Indexeddb lovefield.
Example of use:
# pseudo código da query
SELECT * FROM photo
INNER JOIN album
ON photo.albumId = album.id
WHERE album.id = '1'
// Usando o lovefield para executar a query com innerJoin
var schemaBuilder = lf.schema.create('albums', 1);
schemaBuilder.createTable('Album')
.addColumn('id', lf.Type.INTEGER)
.addColumn('title', lf.Type.STRING);
schemaBuilder.createTable('Photo')
.addColumn('photoId', lf.Type.INTEGER)
.addColumn('title', lf.Type.STRING)
.addColumn('albumId', lf.Type.INTEGER);
schemaBuilder.connect().then(function(db) {
var schema = db.getSchema();
var p = schema.table('Photo');
var a = schema.table('Album');
db.select()
.from(p)
.innerJoin(a, p.albumId.eq(a.id))
.where(a.id.eq(1))
.exec();
});
Browser other questions tagged javascript html5 indexeddb
You are not signed in. Login or sign up in order to post.
It is not possible, but you can store an object as field value, although this does not guarantee integrity, at least it will allow you to navigate between entities.
– Tobias Mesquita
what @Tobymosque says is right, the HTML5 DB is more a nosql than an SQL
– MoshMage