Need to allow only one product purchase VirtueMart 1.1

[dineshprima]

Hello,

In my website i need to allow users only select one product to their cart, multiple products are not allowed to add...so how can i do that using virtuemart...any suggestions??

Thanks
Dinesh

[seyi]

there are commercial products that do this:
https://polishedgeek.com/paid-extensions/virtuemart-purchasing-rules/overview-a-features.html?amigosid=3

[dineshprima]

Thanks for the prompt reply...There is no hack for this freely?

[seyi]

do you mean 1 in quantity (1 of a and 1 of b) or 1 product only into the cart (1 of either a or b)?

[dineshprima]

1 product only into the cart (1 of either a or b)

Only one product will be there in cart..no other products ...because it is a service websites , so users can choose only one service package at a time..

[seyi]

Here is a hack that will do just that.  There are 2 places you need to intercept the cart code. 
1) When adding to the cart:  if there is 1 or more items in the cart, dont add
in www/administrator/components/com_virtuemart/classes/ps_cart.php, in function add, right after

Code: [Select]

<?php
function add(&$d) {
?>enter this

Code: [Select]

<?php
if($_SESSION['cart']["idx"]>=1) return false;
?>


2) when updating the cart: if updating the quantity to more than 1, dont allow
in same file, inside function update, after this line:

Code: [Select]

<?php
$quantity = isset($d["quantity"]) ? (int)$d["quantity"] : 1;
?>enter this

Code: [Select]

<?php
if($quantity>1) $quantity = 1;
if(strtolower($func)=='cartadd') return false;
?>
All done.

[dineshprima]

Thank you very very much seyi...it worked for me...love you..

[DREK]

Thanks it works for me also.

However, I have 1 question.

I want to be able to buy only 1 product but in several quantities. I mean, I click in one product, it goes to the cart. I navigate in the webpage and again click in the same product and it gives me an error.

Any idea to buy ONE TYPE of product but in several quantities?

Regards,

[seyi]

Hi,

The above code is specific for 1 product only.  For one product with multiple quantities, you can try this:

in www/administrator/components/com_virtuemart/classes/ps_cart.php, in function add, right after

Code: [Select]

<?php
function add(&$d) {
?>
enter this

Code: [Select]

<?php
if($_SESSION['cart']["idx"]==0);
elseif($_SESSION['cart'][0]["product_id"] != $d['product_id']) return;
?>

[DREK]

@ seyi thanks for the answer, it was very helpful.

However, I did it slightly different. I would like to to put a text message anytime someone wants to buy different products. Imagine, if someone has A in the cart and wants to hit buy in B, it wouldn't allow it but I want to alert it with a message (something like: Sorry, but you can only buy 1 type product).

Here's the code. I tried it, it works what I wanted it (buy diff. quantities of ONE product but the text message doesn't appear).

function add(&$d) {

 
  if($_SESSION['cart']["idx"]>=1) {}
 

  if($_SESSION['cart']["idx"]==0){}
  elseif($_SESSION['cart'][0]["product_id"] != $d['product_id'])

  {
   echo "<script>alert('Error Here');</script>";
   return;
  }

The problem is how to make an alert message withouth using the ALERT in JS?
 
I think it would be something like? $vmLogger->warning( $VM_LANG->_('PHPSHOP_CART_ERROR_NO_VALID_QUANTITY',false) );  but I am not sure, and I think I am missing something.

Could you please me help me with this one? Or someone else?

Thanks,

[seyi]

you could try either of these

Code: [Select]

<?php
$vmLogger->warning( 'My Error Message' );
$vmLogger->err( 'My Error Message' );
?>

Be sure to add

Code: [Select]

<?php
global $vmLogger;
?>
before calling it.

[DREK]

Hello seyi,

Thanks for the answer. I introduced this code:

 

global $sess, $VM_LANG, $cart, $vmLogger,$func;
 
  if($_SESSION['cart']["idx"]>=1) {}
 
  if($_SESSION['cart']["idx"]==0){}
  elseif($_SESSION['cart'][0]["product_id"] != $d['product_id'])
  {
   
   $vmLogger->warning( 'My Error Message' );
   $vmLogger->err( 'My Error Message' );
return;
  }

With that code, it redirects me to the frontpage of the webpage, without alerting an error message, any idea of how to fix it?

Thanks.

[seyi]

Strange error.  If you look down in the function it is used, for example

Code: [Select]

<?php
if ($quantity < 0) {
vmRequest::setVar('product_id', $product_id );
$vmLogger->warning( $VM_LANG->_('PHPSHOP_CART_ERROR_NO_NEGATIVE',false) );
return False;
}
?>
you can always try joomla messaging system

Code: [Select]

<?php
$mainframe->enqueueMessage('My error message','error');
?>
againt, do not forget to add $mainframe to the global variables

[DREK]

Hello seyi,

Thanks a million, it worked this way.

if($_SESSION['cart']["idx"]>=1) {}
 
  if($_SESSION['cart']["idx"]==0){}
  elseif($_SESSION['cart'][0]["product_id"] != $d['product_id'])
  {
   global $mainframe;
   
   $mainframe->enqueueMessage('Error here!','error');
   return true;
  }

Thanks for all the help, I really appreciated your effort, and WITHOUT abusing of your time, I have another question which I would appreciate just a light about it.

I'm using K2+VirtueMart with Joomla 1.5.

I have a coupons webpage. My problem is that when my clients go to account maintenance link, they have their order history with no problems. However, when they hit in the product that they bought, that link is associated with virtuemart ID and does not redirect to the K2 ID, which I would like to set. Is that possible?

I would like that my clients could have access to the product description even if those products are not available any more. In their order history, they only can click in virtuemart items, which will redirect them to the cart, rather to the products page..

So, basically clients can go to their order history, and hit in a product and is linked to:

index.php?option=com_virtuemart&page=shop.product_ details&flypage=flypage.tpl&product_id=8&Itemid=13 5

And I would like that the product would go to:

index.php?option=com_k2&view=item&id=58

My question is how to call the ID of K2?

Here's the part of the code:

/www/components/com_virtuemart/themes/simplecheckout/templates/pages/account.order_details.tpl.php - path
// ***** Change guard to use new flag $link_to_product instead of !empty( $product_id )
            if( $link_to_product) {
               echo '<a href="'.$sess->url( $mm_action_url."index.php?page=shop.product_details&product_id=$product_id") .'" title="'.$dbcart->f("order_item_name").'">';
     
              }
              $dbcart->p("order_item_name");
              echo " <div style=\"font-size:smaller;\">" . $dbcart->f("product_attribute") . "</div>"

;

I think that the code should me similarly to K2Mart or something like that, but I wanted to stay with VirtueMart and K2. What's the relation of K2 and VirtueMart and how to fix it in order history?

Thanks in advance and one more time, thanks for the help.

[dimcho]

Hello,
I need something similar...
In my website I need to allow users to select:
Form category 1 (its obligate): only 1 product
category 2: only 0 or 1
category 3: only 0 or 1
category 4: only 0, 1 or 2
category 5: only 0, 1 or 2
category 6: only 0 or 1

Is this possible?