Magento2.3 adding the products automatically to the parent category and to the subcategories which are on higher level

Question

I am using Magneto2.3.0 I need this adding the products automatically to the parent category and to the subcategories which are on higher level

If anyone idea reply me how to achieve this requirement. I am trying to below answer code than getting this

please check it my admin image

how to remove selected category above c d p b s options

here below my catalog-category -section image there other brand category inside child category assign it automatically like c d p b s. if i assign shop by department->beauty & personal care->hair->seriums/oils but in above this category other parent category inside child category assign it. so this is wrong to our requirement wise.i share you my category structure below image mentioned

please check i have to install other default magento setup inside this code apply after getting this using luma theme by default.

Answer 1

First Override this file in your custom module

vendor/magento/module-ui/view/base/web/js/form/element/ui-select.js

Modify the toggleOptionSelected function to select parent category.

   toggleOptionSelected: function (data) {

    var isSelected = this.isSelected(data.value);

    if (this.lastSelectable && data.hasOwnProperty(this.separator)) {
        return this;
    }

    if (!this.multiple) {
        if (!isSelected) {
            this.value(data.value);
        }
        this.listVisible(false);
    } else {
        if (!isSelected) { /*eslint no-lonely-if: 0*/
            this.value.push(data.value);

            /* to add current category and callled recursive function for selecting parent category*/
            $.each(data.optgroup, function( key, value ) {
                self.value.push(value.value);
                if (typeof value.optgroup !== 'undefined') {
                    self.childToParentIterate(value,'add');
                }
            });
            if (typeof data.optgroup === 'undefined') {
                self.childToParentIterate(data,'add');
            }

        } else {
            this.value(_.without(this.value(), data.value));
        }
    }

    return this;
}

Added new functions to check the parent category.

childToParentIterate: function(data, op){

    var self = this;

    var path = data.path;

    var level = data.level;

    $.each(this.cacheOptions.tree, function( key, value ) {
        var optgroup = value.optgroup;

        /*if you have your root level category with other label then change this label "Default Category" in below condition */
        if(value.label == "Default Category"){
            $.each(optgroup, function( optkey,optval ) {
                var label = optval.label;
                if(path.indexOf(label) != -1){
                    if(op == "add") self.value.push(optval.value);
                }  

                self.childIteration(optval,op,level,path);
            });
        }
    });
}

childIteration: function(data, op,level,path){

    var self = this;           
    if(data.level < level){
        var optgroup = data.optgroup;
        $.each(optgroup, function( optkey,optval ) {
            var label = optval.label;                   
            if(path.indexOf(label) != -1){
                if(op == "add") self.value.push(optval.value);
            }                    
            self.childIteration(optval,op,level,path);
        });
    }
}