Trying to open the category chooser to select a category condition for the «Catalog Product List» widget leads to the exception «Cannot read property 'value' of null»

dmitry_fedyuk · November 2, 2015, 12:45am

The problem line is:

magento/magento2/blob/fc7a95609323a0e36da01edd671412aa9b85f3b5/app/code/Magento/Rule/view/adminhtml/web/rules.js#L103


    if (remove) {
        Event.observe(remove, 'click', this.removeRuleEntry.bind(this, container));
    }
},


showChooserElement: function (chooser) {
    this.chooserSelectedItems = $H({});
    if (chooser.hasClassName('no-split')) {
        this.chooserSelectedItems.set(this.updateElement.value, 1);
    } else {
        var values = this.updateElement.value.split(','), s = '';
        for (i=0; i<values.length; i++) {
            s = values[i].strip();
            if (s!='') {
               this.chooserSelectedItems.set(s,1);
            }
        }
    }
    new Ajax.Request(chooser.getAttribute('url'), {
        evalScripts: true,
        parameters: {'form_key': FORM_KEY, 'selected[]':this.chooserSelectedItems.keys() },