Jaydata when there are sequential add operations not working - jaydata

Question

I'm using Jaydata with it's Indexeddbprovider, I've a problem in adding scenario.
When there are multiple adds, just the first one works!
$data.Entity.extend("Person", {
Id: { type: "int", key: true, computed: false },
Task: { type: String, required: true, maxLength: 200 },
DueDate: { type: Date },
Completed: { type: Boolean },
University: { type: "int"},
Degree: { type: "int" }
});
$data.EntityContext.extend("ClientDatabase", {
People: { type: $data.EntitySet, elementType: Person }
});
var db = new ClientDatabase({
provider: 'indexedDb', databaseName: 'ClientDB', version: 1
});
var newEntity = {
Id: 1,
Task: 'task1',
DueDate: new Date(),
Completed: false,
University: 1,
Degree: 1
};
var newEntity2 = {
Id: 4,
Task: 'task4',
DueDate: new Date(),
Completed: false,
University: 4
Degree: 4
};
add(db, newEntity, entity1AddedSuccessfully);
function entity1AddedSuccessfully(){
add(db, newEntity2);
}
function add(db, entity, callback){
db.onReady({
success: function () {
db["_People"].add(entity);
db.saveChanges(function () {
if (callback !== undefined) {
callback(entity);
}
});
}
});
}
The problem is in this scenario, newEntity is just added to ClientDB and there is no newEntity2!
Any help would be appreciated.

Answer 1

I made many changes in the code, you can check it out on JSFiddle.
Important things:
use the typed db.People collection to query and insert the records
(not db["_People"])
use typed entites - new Person()
if you use auto-generated Id, it's better to not set it manually :)
after I modified all of these above, your logic passed the same newEntity to
the callback, so I had 3 records instead of 2. I simplified the code
by removing the callback function definitions
Check out the JSFiddle code and share your feedback if you wanted to achieve this behavior
$data.Entity.extend("Person", {
Id: { type: "int", key: true, computed: true },
Task: { type: String, required: true, maxLength: 200 },
DueDate: { type: Date },
Completed: { type: Boolean },
University: { type: "int"},
Degree: { type: "int" }
});
$data.EntityContext.extend("ClientDatabase", {
People: { type: $data.EntitySet, elementType: Person }
});
var db = new ClientDatabase({
provider: 'indexedDb', databaseName: 'ClientDB', version: 1
});
db.onReady(function(){
var newEntity = new Person( {
Task: 'task1',
DueDate: new Date(),
Completed: false,
University: 1,
Degree: 1
});
var newEntity2 = new Person({
Task: 'task4',
DueDate: new Date(),
Completed: false,
University: 4,
Degree: 4
});
db.People.add(newEntity);
db.saveChanges(function() {
db.People.add(newEntity2);
db.saveChanges(function() {alert(newEntity2.Id);});
});
});

Answer 2

I'm afraid that you've mixed it up a little bit.
$data.Entity and $data.EntityContext are for model definition
var db = new ClientDatabase(...)
db is a database context and it has no EntityContext method or property
so your code should look like:
db.onReady()
db.People.add(entity)
db.saveChanges(...)

Answer 3

I hope this helps someone… it did the trick for me…
http://jaydata.org/forum/viewtopic.php?f=3&t=184