Change product quantity value for attribute

[theDoris]

Prestashop v1.6.1.13 default-bootstrap theme.
 
When I change in product.js
 
 

// The button to increment the product value
$(document).on('click', '.product_quantity_up', function(e){
e.preventDefault();
fieldName = $(this).data('field-qty');
var currentVal = parseInt($('input[name='+fieldName+']').val());
if (!allowBuyWhenOutOfStock && quantityAvailable > 0)
quantityAvailableT = quantityAvailable;
else
quantityAvailableT = 100000000;
if (!isNaN(currentVal) && currentVal < quantityAvailableT)
$('input[name='+fieldName+']').val(currentVal + 1).trigger('keyup');
else
$('input[name='+fieldName+']').val(quantityAvailableT);
$('#quantity_wanted').change();
});

 
to this:
 

// The button to increment the product value
$(document).on('click', '.product_quantity_up', function(e){
e.preventDefault();
fieldName = $(this).data('field-qty');
var currentVal = parseInt($('input[name='+fieldName+']').val());
if (!allowBuyWhenOutOfStock && quantityAvailable > 0)
quantityAvailableT = quantityAvailable;
else
quantityAvailableT = 100000000;
if (!isNaN(currentVal) && currentVal < quantityAvailableT)
$('input[name='+fieldName+']').val(currentVal + 2).trigger('keyup'); //this line changed
else
$('input[name='+fieldName+']').val(quantityAvailableT);
$('#quantity_wanted').change();
});

 
I'm able to change value in input for 2 qauntity up on every time when I push increment button, but when I put in code minimalQuantity and code in changed line looks like: 

 

$('input[name=+fieldName+]').val(currentVal + minimalQuantity).trigger('keyup');

 

this is work only for product witout attributes. If product have attributes this is didnt work, it seems like minimalQuantity for product without attributes give correct value but for product with attributes value is always 1.
 
How I can fix it?

[theDoris]

When I use in product.js: console.log(combination) in source code I see correct value for minimal_quantity for this combination of attributes but still I dont know how I can use it for this product and regular product in product.js?

 

So regular product use: minimalQuantity and product with attributes use minimal_quantity how I can use them in this code for correct display?

[DataKick]

When I use in product.js: console.log(combination) in source code I see correct value for minimal_quantity for this combination of attributes but still I dont know how I can use it for this product and regular product in product.js?

 

So regular product use: minimalQuantity and product with attributes use minimal_quantity how I can use them in this code for correct display?

 

Well, you first need to determine what combination is selected (if any) and then get its minimal_quantity value. Example code:

function getCurrentCombination() {
  if (window.combinationsHashSet) {
    var choice = [];
    var radioInputs = parseInt($('#attributes .checked > input[type=radio]').length);
    if (radioInputs)
      radioInputs = '#attributes .checked > input[type=radio]';
    else
      radioInputs = '#attributes input[type=radio]:checked';

    $('#attributes select, #attributes input[type=hidden], ' + radioInputs).each(function() {
      choice.push(parseInt($(this).val()));
    });
    var id = choice.join('-');
    return window.combinationsHashSet[id];
  }
}

function getMinimalQuantity() {
  var combination = getCurrentCombination();
  return combination ? combination['minimal_quantity'] : window.minimalQuantity;
}

// ...

$('input[name='+fieldName+']').val(currentVal + getMinimalQuantity()).trigger('keyup'); //this line changed

Edited April 28, 2017 by DataKick (see edit history)

[theDoris]

Thank you it is awesome! You are awesome!