Magento Layered Navigation “You cannot define a correlation name 'mycustomattribute' more than once ”

Question

I\'m using Magento\'s layered navigation with my custom attributes and price. If I filter by price it works; but when filtering by my custom attributes it shows:

Answer 1

This causes the same problem. -adding the same attribute to the sort twice when building a collection:

...
    ->addAttributeToSort('color', 'asc')
    ->addAttributeToSort('color', 'asc');

NOTE: calling setCollection($this->getMyCollection); on the template caused my error, because 'color' was already added to the sort order as the default sort order.

SOLUTION:a quick way to fix this is to remove the default sort order from the request after obtain the value:

$this->getRequest()->setParam('order','');

otherwise extend the Block and override the setCollection() method for your particular needs.