I have come across a bug when filtering a buffered store that results in two requests to load the same set of data. I am currently running ext version 5.1.0.50. This is due to the filter method calling this.callParent(arguments) twice when this.remoteSort is true. Below, is the filter method from ext/packages/sencha-core/src/data/BufferedStore.js:

Code:



    filter: function() {
        // For a buffered Store, we have to clear the page cache because the dataset will change upon filtering.
        // Then we must prefetch the new page 1, and when that arrives, reload the visible part of the Store
        // via the guaranteedrange event
        if (this.remoteSort) {
            this.getData().clear();
            this.callParent(arguments);
        }
        //<debug>
        else {
            Ext.Error.raise('Local filtering may not be used on a buffered store - the store is a map of remote data');
        }
        //</debug>
        this.callParent(arguments);
    },

This is what it should be:

Code:



    filter: function() {
        // For a buffered Store, we have to clear the page cache because the dataset will change upon filtering.
        // Then we must prefetch the new page 1, and when that arrives, reload the visible part of the Store
        // via the guaranteedrange event
        if (this.remoteSort) {
            this.getData().clear();
        }
        //<debug>
        else {
            Ext.Error.raise('Local filtering may not be used on a buffered store - the store is a map of remote data');
        }
        //</debug>
        this.callParent(arguments);
    },