Remove CQL_Filter from OpenLayers Map

cql-filterjavascriptopenlayers-2

I'm using OpenLayers to show my map with some layers. I've a field where I can add some filters with CQL code. I can successfully add a new filter to my map, and only the right points appear in my map but when I try to remove the filters it's deleting my Layer instead of my previous CQL_Filter result, so is deleting ALL the points from the map. 

//My var map is previously declared
var layerFromMap = map.getLayersByName(input.name)[0];
//If my input is empty then I should delete the filters, like resetting the search
if (input.value.length > 0) {
    layerFromMap.mergeNewParams({ 'CQL_FILTER': input.value });
    layerFromMap.redraw();
} else {
    delete layerFromMap.params.CQL_FILTER;
    layerFromMap.redraw();
}

When input is empty layerFromMapparams.CQL_FILTER is deleting my layer from the map, so all the points are deleted. Why is this happening? How can I only remove the filter so all the points appear again?

Best Answer

I just find out how to do it and is very simple, just set the CQL_FILTER to null:

//My var map is previously declared
var layerFromMap = map.getLayersByName(input.name)[0];
//If my input is empty then I should delete the filters, like resetting the search
if (input.value.length > 0) {
    layerFromMap.mergeNewParams({ 'CQL_FILTER': input.value });
    layerFromMap.redraw();
} else {
    layerFromMap.mergeNewParams({ 'CQL_FILTER': null });
    layerFromMap.redraw();
}
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