Auto-saving via XmlHttpRequest from EditorGridPanel in ExtJS 3.0?
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05-07-2019 - |
Question
I have an EditorGridPanel in Ext JS 3.0, populated via HttpProxy and JsonReader, and I have an editable column "working"--I can edit the value and it flags it as dirty.
Now, how do I get it to, after a cell has been edited, send an XmlHttpRequest to the server with a few base parameters, the row's ID field, the name of the column changed, and the new value?
Once the request has been made, the server-side update is easy. But no amount of Google and digging through the trivial in-memory EditGridPanel examples is helping with getting the EditGridPanel to make the call.
What I'm not looking for:
- REST--just update via normal GET or POST
- Insert new records, or delete rows--updates only for now.
- Batch updates--just one cell edit at a time.
- A bunch of code--this should be trivial, like the Ajax.InPlaceEditor in Scriptaculous
Solution
I finally figured it out... just needed a writer on my store:
var ds = new Ext.data.JsonStore({
autoSave: true,
url: "ajax-handler.aspx",
method: "POST",
timeout: 120000,
root: "rows",
totalProperty: "results",
idProperty: "primarykeyvalue",
fields: previewColumnConfig,
baseParams: {
now: (new Date()).getTime()
},
writer: new Ext.data.JsonWriter({
encode: true,
listful: false
})
});
Notes:
- The "now" baseparam is to get around "some browsers" (take a guess) caching of AJAX results
- "encode" returns POST variables rather than just a bare JSON result in POST.
- "listful" is disabled because the user is only editing one row/column at a time, no need to design the server-side parser to bring in an array, it can just expect one row.
- Yes, I have a really long timeout value.
- previewColumnConfig is defined beforehand, stores my column definitions.
OTHER TIPS
You could use the afteredit event for Ext.grid.EditorGridPanel which will fire after the editor is blurred. Also you could set a periodic(Interval) checking method when the beforeedit event is fired and clear it when the afteredit event is fired.
Example for afteredit:
EditorGridPanel.getColumnModel().getCellEditor(column).on('afteredit', function() {
//do ajax call for the update.
});
Let me know if you need an example for the periodic checker and I will write one up.