This API is available on Firefox OS for internal applications 仅。
add()
方法在
DataStore
interface adds a new record to the data store; if the record you are attempting to add already exists, it will throw an exception.
注意 : The Data Store API is available in Web 工作者 , from Firefox 32 onwards (Firefox OS 2.0; see bug 949325 )。
store.add(object).then(function(id) {
// Do something with id, which is the id of the record added to the data store
});
A
Promise
object of type
DataStoreKey
that resolves with a ID number identifying the record added to the store.
对象
The object you want to add to the data store.
id
DataStoreKey
of type unsigned long or
DOMString
, if you want to give the added record a specific id. If you don't specify this, the object's id will be numeric (auto incremented).
revisionId
revisionId
(
DOMString
). This can be used to prevent conflicts. If the
revisionId
is not the current
revisionId
for the current Data Store, the operation is aborted. This means that the developer has a 'old'
revisionId
and will have to manage the conflict somehow.
The following example function takes the current data store and an object to be added to the data store as arguments, adds the object to the store, and then creates a table row to display the object data in the app and appends it to an existing table in the DOM:
function addContact(store, obj) {
store.add(obj).then(function(id) {
var tableRow = document.createElement('tr');
tableRow.innerHTML = '<td>' + obj.lName +
'</td><td>' + obj.fName +
'</td><td>' + obj.phone +
'</td><td>' + obj.email +
'</td><td>' + obj.address + '</td>';
tBody.appendChild(tableRow);
var myId = id;
console.log(myId);
tableRow.setAttribute('data-id', myId);
tableRow.onclick = function(event) {
deleteItem(event);
}
});
}
注意 : To see this function working inside a complete example, check out our Data Store Contacts Editor 范例。
| 规范 | 状态 | 注释 |
|---|---|---|
| Data Store API | 草案 |
注意，
add()
isn't currently defined in the spec, but this should be updated soon. It will replace the now-deprecated
insert()
方法。
The discussion concerning this API's creation happened in various Mozilla mailing lists and other places. A summary of the discussion and further pointers can be found on the Mozilla Wiki . For further feedback and questions, send mail to the dev-webapi mailing list.