Created
January 28, 2016 08:37
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Sample for trying out Lovefield DB Inspector
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| <!doctype html> | |
| <html> | |
| <head> | |
| <meta charset="utf-8" /> | |
| <title>Sample for trying out Lovefield DB Inspector</title> | |
| <script type="text/javascript" src="https://rawgithub.com/google/lovefield/8ad30503657a8e52587640678be541415984b8de/dist/lovefield.js"></script> | |
| </head> | |
| <body> | |
| <script> | |
| var schemaBuilder = lf.schema.create('todo', 1); | |
| schemaBuilder.createTable('Item'). | |
| addColumn('id', lf.Type.INTEGER). | |
| addColumn('description', lf.Type.STRING). | |
| addColumn('deadline', lf.Type.DATE_TIME). | |
| addColumn('done', lf.Type.BOOLEAN). | |
| addPrimaryKey(['id']). | |
| addIndex('idxDeadline', ['deadline'], false, lf.Order.DESC); | |
| schemaBuilder.createTable('Comment'). | |
| addColumn('id', lf.Type.INTEGER). | |
| addColumn('itemId', lf.Type.INTEGER). | |
| addColumn('text', lf.Type.STRING). | |
| addPrimaryKey(['id']); | |
| var todoDb; | |
| var item; | |
| var comment; | |
| schemaBuilder.connect({enableInspector: true}).then(function(db) { | |
| todoDb = db; | |
| item = db.getSchema().table('Item'); | |
| comment = db.getSchema().table('Comment'); | |
| var row = item.createRow({ | |
| 'id': 1, | |
| 'description': 'Get a cup of coffee', | |
| 'deadline': new Date(), | |
| 'done': false | |
| }); | |
| var commentRow = comment.createRow({ | |
| 'id': 1, | |
| 'itemId': 1, | |
| 'text': 'OK!' | |
| }); | |
| return db.insertOrReplace().into(item).values([row]).exec(). | |
| then(function() { | |
| return db.insertOrReplace().into(comment).values([commentRow]).exec(); | |
| }); | |
| }).then(function() { | |
| return todoDb.select(). | |
| from(item). | |
| innerJoin(comment, comment.itemId.eq(item.id)). | |
| where(item.done.eq(false)).exec(); | |
| }).then(function(results) { | |
| results.forEach(function(row) { | |
| console.log(row.Item.description, 'before', row.Item.deadline, row.Comment.text); | |
| document.body.textContent = | |
| row.Item.description + ' before ' + row.Item.deadline + '. ' + row.Comment.text; | |
| }); | |
| }); | |
| </script> | |
| </body> | |
| </html> |
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