[4.2.0.265] Strange behaviour after TreeStore reloading (TreeStore with proxy)

**vladsch** · 5 Feb 2013 6:59 AM

REQUIRED INFORMATION

Ext version tested:

Ext 4.2.0 rev 265

Browser versions tested against:

Chrome
IE9

DOCTYPE tested against:

<!DOCTYPE html>

Description:

If call reload method of TreeStore then strange behaviour can be observed: many nodes are duplicated

Steps to reproduce the problem:

Open the following test case and click Refresh button. For test case I used memory proxy with read method override, in that override I added defer 1000 ms, without that override Chrome is crashed after Refresh click (IE9 shows js error - Stack maximum overflow)
If remove nodes ids then duplication behaviour is different

The result that was expected:

Behaviour after reloading should not be different

The result that occurs instead:

Tree starts to duplicate nodes

Test Case:

Code:

    <!DOCTYPE html>
<html>
<head>
    <title></title>    
	<link rel="stylesheet" type="text/css" href="../../resources/css/ext-all.css" />
	<script type="text/javascript" src="../../ext-all.js"></script>	

	<script type="text/javascript">
		function read(operation, callback, scope) {
			Ext.defer(function(){
			var me = this,
				resultSet = operation.resultSet = me.getReader().read(me.data),
				records = resultSet.records,
				sorters = operation.sorters,
				filters = operation.filters;

			operation.setCompleted();

			// Apply filters, sorters, and start/limit options
			if (resultSet.success) {

				// Filter the resulting array of records
				if (filters && filters.length) {
					records = resultSet.records = Ext.Array.filter(records, Ext.util.Filter.createFilterFn(filters));
				}

				if (sorters && sorters.length) {
					resultSet.records = Ext.Array.sort(records, Ext.util.Sortable.createComparator(sorters));
				}

				// Reader reads the whole passed data object.
				// If successful and we were given a start and limit, slice the result.
				if (me.enablePaging && operation.start !== undefined && operation.limit !== undefined) {

					// Attempt to read past end of memory dataset - convert to failure
					if (operation.start >= resultSet.total) {
						resultSet.success = false;
						resultSet.count = 0;
						resultSet.records = [];
					}
					// Range is valid, slice it up.
					else {
						resultSet.records = Ext.Array.slice(resultSet.records, operation.start, operation.start + operation.limit);
						resultSet.count = resultSet.records.length;
					}
				}
			}
			
			
				if (resultSet.success) {
					operation.setSuccessful();
				} else {
					me.fireEvent('exception', me, null, operation);
				}
				Ext.callback(callback, scope || me, [operation]);
			}, 1000, this);			
		}
	
		Ext.onReady(function () {
			var tree = Ext.create("Ext.tree.Panel", {
				store: {					
					type: "tree",
					proxy : {
						type: "memory",
						read : read,
						data : {
							"children": [{
								"id": "node1",
								"expanded": true,								
								"text": "Node 1 634956848574517153",
								"children": [{
									"id": "node2",									
									"text": "Node 2",
									"children": [{
										"id": "node3",
										"leaf": true,										
										"text": "Node 3"
									}]
								}]
							}]
						}
					}
				},				
				height: 400,
				renderTo: document.body,
				tbar: {					
					"xtype": "toolbar",
					items: [{						
						text: "Refresh",
						handler: function () {
							tree.store.reload();
						}
					}]
				},				
				rootVisible: false
			});
		});
    </script>
	
</head>
<body>
</body>
</html>

HELPFUL INFORMATION

Debugging already done:

none

Possible fix:

not provided

Additional CSS used:

only default ext-all.css

Operating System:

Win7

**mitchellsimoens** · 5 Feb 2013 7:54 AM

Thanks for the report! I have opened a bug in our bug tracker.

[4.2.0.265] Strange behaviour after TreeStore reloading (TreeStore with proxy)

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[4.2.0.265] Strange behaviour after TreeStore reloading (TreeStore with proxy)

[4.2.0.265] Strange behaviour after TreeStore reloading (TreeStore with proxy)