[MOD] Quantity discounts for all the products in the same default category.

October 27, 2010

The following modification will allow you to use the quantity discount for all the products in the same default category, regardless of attributes.

The discount will apply to all the products that have the same quantity discount and are in the same default category.

I.E.
Product A, Product B and Product C are all in the same category.
Product A and B have q quantity discount of 10% for 5 items.

The discount will apply for 1 X Product A (blue) + 1 X Product A (red) + 3X Product B

It requires making changes in 2 Prestashop classes.

Prestashop 1.2.*
/classes/PaymentModule.php

Replace

// Quantity discount
$reduc = 0.0;
if ($product['quantity'] > 1 AND ($qtyD = QuantityDiscount::getDiscountFromQuantity($product['id_product'], $product['quantity'])))

With

// Get quantity including attributes for all products in the same default category //
$result = Db::getInstance()->ExecuteS('SELECT a.id_product FROM '._DB_PREFIX_.'discount_quantity a, '._DB_PREFIX_.'discount_quantity b, '._DB_PREFIX_.'product p1, '._DB_PREFIX_.'product p2
WHERE
b.id_product = '.$product['id_product'].' AND
a.quantity = b.quantity AND
a.value = b.value AND
a.id_product = p1.id_product AND
b.id_product = p2.id_product AND
p1.id_category_default = p2.id_category_default');
foreach ($result AS $row)
  $in_product_discount .= isset($in_product_discount)?','.$row['id_product']:$row['id_product'];
// Get total quantity including attributes //
$qty_result = Db::getInstance()->ExecuteS('SELECT SUM(quantity) AS sum FROM `'._DB_PREFIX_.'cart_product` WHERE `id_cart` = '.intval($cart->id > 0?$cart->id:$cookie->id_cart).' AND `id_product` IN ('.$in_product_discount.')');
$real_quantity = $qty_result[0]['sum'];
// Quantity discount
$reduc = 0.0;
if ($product['quantity'] > 1 AND ($qtyD = QuantityDiscount::getDiscountFromQuantity($product['id_product'], $real_quantity)))

Prestashop 1.3.*
/classes/PaymentModule.php

Replace

// Quantity discount
$reduc = 0.0;
if ($product['cart_quantity'] > 1 AND ($qtyD = QuantityDiscount::getDiscountFromQuantity($product['id_product'], $product['cart_quantity'])))

With

// Get quantity including attributes for all products in the same default category //
$result = Db::getInstance()->ExecuteS('SELECT a.id_product FROM '._DB_PREFIX_.'discount_quantity a, '._DB_PREFIX_.'discount_quantity b, '._DB_PREFIX_.'product p1, '._DB_PREFIX_.'product p2
WHERE
b.id_product = '.$product['id_product'].' AND
a.quantity = b.quantity AND
a.value = b.value AND
a.id_product = p1.id_product AND
b.id_product = p2.id_product AND
p1.id_category_default = p2.id_category_default');
foreach ($result AS $row)
  $in_product_discount .= isset($in_product_discount)?','.$row['id_product']:$row['id_product'];
// Get total quantity including attributes //
$qty_result = Db::getInstance()->ExecuteS('SELECT SUM(quantity) AS sum FROM `'._DB_PREFIX_.'cart_product` WHERE `id_cart` = '.intval($cart->id > 0?$cart->id:$cookie->id_cart).' AND `id_product` IN ('.$in_product_discount.')');
$real_quantity = $qty_result[0]['sum'];
// Quantity discount
$reduc = 0.0;
if ($product['cart_quantity'] > 1 AND ($qtyD = QuantityDiscount::getDiscountFromQuantity($product['id_product'], $real_quantity)))

Prestashop 1.2.* AND 1.3.*
/classes/Product.php

Replace

// Caching system
$cacheId = $id_product.'-'.($usetax?'1':'0').'-'.$id_product_attribute.'-'.$decimals.'-'.$divisor.'-'.($only_reduc?'1':'0').'-'.($usereduc?'1':'0').'-'.$quantity;

With

$result = Db::getInstance()->ExecuteS('SELECT a.id_product FROM '._DB_PREFIX_.'discount_quantity a, '._DB_PREFIX_.'discount_quantity b, '._DB_PREFIX_.'product p1, '._DB_PREFIX_.'product p2
WHERE
b.id_product = '.$id_product.' AND
a.quantity = b.quantity AND
a.value = b.value AND
a.id_product = p1.id_product AND
b.id_product = p2.id_product AND
p1.id_category_default = p2.id_category_default');
foreach ($result AS $row)
 $in_product_discount .= isset($in_product_discount)?','.$row['id_product']:$row['id_product'];
// Get quantity including attributes //
$qty_result = Db::getInstance()->ExecuteS('SELECT SUM(quantity) AS sum FROM `'._DB_PREFIX_.'cart_product` WHERE `id_cart` = '.intval($cart->id > 0?$cart->id:$cookie->id_cart).' AND `id_product` IN ('.$in_product_discount.')');
$real_quantity = $qty_result[0]['sum'];

// Caching system
$cacheId = $id_product.'-'.($usetax?'1':'0').'-'.$id_product_attribute.'-'.$decimals.'-'.$divisor.'-'.($only_reduc?'1':'0').'-'.($usereduc?'1':'0').'-'.$real_quantity.'-'.($id_customer ? $id_customer : '0');;

And

       if ($quantity > 1 AND ($qtyD = QuantityDiscount::getDiscountFromQuantity($id_product, $quantity)))

With

       if ($quantity > 0 AND ($qtyD = QuantityDiscount::getDiscountFromQuantity($id_product, $real_quantity)))

November 1, 2010

Hi Tomerg3,

Can you give this a quick once over in case you missed something off it as I have tried this on a PrestaShop v.1.3.2 install and I could not get it to work for me.

Thanks

November 2, 2010

Just did it for http://www.[My Website].com/1323upsdemo/category.php?id_category=2 (5 items 20% discount).

I added to the cart 2 green shuffles, 2 pink Shuffles, 1 Nano, and I got the discount.

November 2, 2010

Hi Tomerg

Tried your site and it does work so I must be pasting in the code wrong. Damn!
Would it be possible to let me see your modified Product.php and PaymentModule.php?
Sorry if this sounds a bit forward but I've spent the last hour trying again to get this working on a V1.3.2.

Raffs

November 3, 2010

Here are the files for PS 1.3.2.

PaymentModule.php

Product.php

November 3, 2010

Tomerg

I would like to say a big Thank you, I have downloaded the two files and it works a treat. you're a genius!

Raffs

PS. on another note my friend in England purchased your Attribute Wizard Pro last week and hasn't stopped talking about it!

November 5, 2010

Glad to hear that, on both counts

November 15, 2010

This is awesome!

Is there a way to mod it so that it only affects one category(or sub-category in my case)? I want to use this code for a "special" like "3 for 20" in a specific subcategory.

Thanks in advance!

November 15, 2010

Change

p1.id_category_default = p2.id_category_default');

To

p1.id_category_default = p2.id_category_default AND p1.id_category_default = X');

X should be the ID of the category you want this to apply to.

I haven't tested this, so try it out before using it on a live site.

November 17, 2010

Is it possible to show in cart this discount and on the invoice? Like when I add 2 products then cart shows -5% and so on

November 17, 2010

This is a missing feature from Prestashop in general.

I may address it at some point with a modification.

December 1, 2010

I am not sure whether you guys encounter the problem I met after applying this code.

The scenario is like this:
When you added in certain quantities to get the discount, the price will be automatically changed to after-discount price at category page, but the product page will still show original price. It will confuse customers.

December 1, 2010

This is the way PS handles this, my Mod doesn't change that.

December 16, 2010

I tried using your files, coping and pasting even re-typing, but I never could get the product page to work with your code.

December 16, 2010

I am willing to pay someone for some work on my carts

December 16, 2010

what version of Prestashop are you using?

December 16, 2010

1.3.2 I believe or 1.3.3 I just downloaded it last week

December 17, 2010

This Mod was tested on PS 1.3.2.3, I did not test it on PS 1.3.3

You can try to copy just the line numbers and not use the included files.

January 22, 2011

Hi, I'm using PS 1.3.6 and I just tried to "install" this mod.
I tried with the provided files and also by manually replacing the code posted before. Sadly I always get this error:

You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ')' at line 1
SELECT SUM(quantity) AS sum FROM `ps_cart_product` WHERE `id_cart` = 10 AND `id_product` IN ()

Is there any way to fix it? or did I do something wrong? I would really LOVE to be able to use this very nice and useful discount feature

January 28, 2011

Try changing

$qty_result = Db::getInstance()->ExecuteS('SELECT SUM(quantity) AS sum FROM `'._DB_PREFIX_.'cart_product` WHERE `id_cart` = '.intval($cart->id > 0?$cart->id:$cookie->id_cart).' AND `id_product` IN ('.$in_product_discount.')');
$real_quantity = $qty_result[0]['sum'];

To

if ($in_product_discount != "")
{
$qty_result = Db::getInstance()->ExecuteS('SELECT SUM(quantity) AS sum FROM `'._DB_PREFIX_.'cart_product` WHERE `id_cart` = '.intval($cart->id > 0?$cart->id:$cookie->id_cart).' AND `id_product` IN ('.$in_product_discount.')');
$real_quantity = $qty_result[0]['sum'];
}
else
$real_quantity = $quantity;

February 11, 2011

Change
p1.id_category_default = p2.id_category_default');
To
p1.id_category_default = p2.id_category_default AND p1.id_category_default = X');
X should be the ID of the category you want this to apply to.

I haven't tested this, so try it out before using it on a live site.

Just wondering can discount be applied to you specific categories only:

For example i have to apply discount for category 5 and 9:

I have tried

p1.id_category_default = p2.id_category_default AND p1.id_category_default = 5 AND p1.id_category_default = 9 ');

&

p1.id_category_default = p2.id_category_default AND p1.id_category_default = 5 OR p1.id_category_default = 9 ');

but no joy. Could somebody help me this issues please.

Thanks in Advance

February 21, 2011

Hello,

First of all, thank you very much for this feature. I have tested it on PS 1.3.7 and it works very well.

This is nearly what I was looking for. What I would like to do, is to extend this feature, not to products in a same category, but to the products in every category.

For example, 5 products of cat 1, 5 products of cat 2, and 5 products of cat 3 = total 15 products, i would like to apply a discount on every product.

Is this possible and could you point me in the right direction ?

Many thanks,

Regards

February 22, 2011

Mutix, try removing the follow part of the SQL query

AND
p1.id_category_default = p2.id_category_default

February 22, 2011

Thanks a lot tomerg3, this works perfectly !

April 4, 2011

Hi

I have tried to apply the quantity discounts to my store and I have a problem with it.
In my BO (Prestashop 1.3.7) appears the following message.

Notice: Undefined variable: in_product_discount in /Applications/MAMP/htdocs/efimeracaenis/classes/Product.php on line 1448

I have checked the line 1448.

$qty_result = Db::getInstance()->ExecuteS('SELECT SUM(quantity) AS sum FROM `'._DB_PREFIX_.'cart_product` WHERE `id_cart` = '.intval($cart->id > 0?$cart->id:$cookie->id_cart).' AND `id_product` IN ('.$in_product_discount.')');

The problem seems to be the variable "$in_product_discount".

How can I fix it? Who can help me, please?

Thanks for all.

April 4, 2011

Add
$in_product_discount = "";
after
// Get quantity including attributes for all products in the same default category //

April 4, 2011

I have it done, but I have the same problem.
I am attaching the code, thanks.

PaymentModule.php

// Get quantity including attributes for all products in the same default category //
$in_product_discount = "";
$result = Db::getInstance()->ExecuteS('SELECT a.id_product FROM '._DB_PREFIX_.'discount_quantity a, '._DB_PREFIX_.'discount_quantity b, '._DB_PREFIX_.'product p1, '._DB_PREFIX_.'product p2
WHERE
b.id_product = '.$product['id_product'].' AND
a.quantity = b.quantity AND
a.value = b.value AND
a.id_product = p1.id_product AND
b.id_product = p2.id_product AND
p1.id_category_default = p2.id_category_default');
foreach ($result AS $row)
$in_product_discount .= isset($in_product_discount)?','.$row['id_product']:$row['id_product'];
// Get total quantity including attributes //
$qty_result = Db::getInstance()->ExecuteS('SELECT SUM(quantity) AS sum FROM `'._DB_PREFIX_.'cart_product` WHERE `id_cart` = '.intval($cart->id > 0?$cart->id:$cookie->id_cart).' AND `id_product` IN ('.$in_product_discount.')');
$real_quantity = $qty_result[0]['sum'];
// Quantity discount
$reduc = 0.0;
if ($product['cart_quantity'] > 1 AND ($qtyD = QuantityDiscount::getDiscountFromQuantity($product['id_product'], $real_quantity)))
$reduc = QuantityDiscount::getValue($price_wt, $qtyD->id_discount_type, $qtyD->value, new Currency(intval($order->id_currency)));

Product.php

// Get quantity including attributes //
$qty_result = Db::getInstance()->ExecuteS('SELECT SUM(quantity) AS sum FROM `'._DB_PREFIX_.'cart_product` WHERE `id_cart` = '.intval($cart->id > 0?$cart->id:$cookie->id_cart).' AND `id_product` IN ('.$in_product_discount.')');
$real_quantity = $qty_result[0]['sum'];

April 4, 2011

You should also add it at the top of the change to product.php, which seems to be missing some code.

April 5, 2011

Hi.

I have tried to use the file that you have uploading, product.php, and I have same problem. I have thought that the problem maybe my data base. Maybe some variable is missing?

Thanks.

April 6, 2011

thanks so much tomerg3, you really help me..
beside that, i also apply a discount if a total amount of buying for product in ALL category reached $50 (before the cut off prices), so all the product price in ALL category would be reduced by $0,6..
Do you have any solutions to help me again ? thanks before..

sorry about my english..

May 9, 2011

This looks like what I'm after... maybe.

When i tried it on my local MAMP server it just brought up the white screen of death. But i assume thats because i am using prestashop 1.4. can i make some modifications to bring your creation to life?

May 10, 2011

I am swamped, but I will try to update this for 1.4 in the next week or so...

May 10, 2011

Thanks so much that would be a great help

July 1, 2011

Hello tomerg3,
We have on our site the words "Our Price:" before the price.
But when I turn on quantity discounts module they dissapear. How can I add this to the module so they show?
Can you show me where please?

July 1, 2011

Look in the tpl file (quantitydiscount.tpl).

July 1, 2011

Yes thanks, ive been looking at that for the last 2 hours!
;-)

function fetchCurrentPrice() {ldelim}
   var val = $("#our_price_display").text().replace(currencySign,'');
   var qd_price = "";
   for (var i = 0 ; i < val.length ; i++)
       if (/[0-9.,]/.test(val.charAt(i)))
           qd_price += val.charAt(i);
   var arr = qd_price.split(",");
   if (arr[arr.length - 1].length == 2)
       qd_price = qd_price.replace(/,/g,'.');
   else
       qd_price = qd_price.replace(/,/g,'');
   return parseFloat(qd_price);
{rdelim}

Is it this area?

July 1, 2011

No,

It should be on this line

discountStr += "{$qd_quantity_discount.from_quantity|intval} ";

July 1, 2011

tomerg3, thanks very helpful. Thank you for the reply!

July 1, 2011

Sorry tomerg3, I ment the main price display, not the quantitydiscount price display.
Our main price has lost its text.. I assume your module is hiding the price and putting it back in again, then showing the quantitydiscounts below it.

Where would I put the actual text in for the main price?

July 1, 2011

The module should not be hiding the price, if it is, it may be related to something custom in your theme...

July 7, 2011

Great job tomerg3! Works like a charm
Any progress in an update for v.1.4?

July 7, 2011

No, I have been so swamped lately, I have not gotten around to it, it's still high on my list.

July 12, 2011

I will be waiting desperately for the 1.4 upgrade.

THANKS A LOT!

July 27, 2011

I will be waiting desperately for the 1.4 upgrade. <br/><br/>THANKS A LOT!

I'm willing to pay for this. Can you please quote me ?

July 27, 2011

Tomerg3 Hello. Thank you for the file modifications to create quantity discounts. What should I change the files so that the quantity discount only applies to a group of clients, for example, by default. Thank you

August 17, 2011

Ah!!! This is what I have been looking for! But alas... like the Better Together module... it isn't working with 1.4...

I am more optimistic and still have hope on this one! It seems tomerg3 is still actively helping in this thread!

Thank you tomerg3! I look forward to your update on this for 1.4!

September 2, 2011

I think this is exactly what I need too! Anxiously watching for it in 1.4! Thanks so much in advance!

November 2, 2011

Just wanted to see if there has there been any progress on this mod for 1.4?

November 7, 2011

Sorry for the long delay, but it's finally here...

http://www.prestashop.com/forums/topic/140803-module-category-quantity-discount-apply-quantity-discounts-across-all-products-in-a-category/

August 16, 2012

How can I add an discount to all products in the store?

[MOD] Quantity discounts for all the products in the same default category.

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