Magento built-in Qty Increments is a nice set of functionality. Simple, but effective. It forces user to buy specific product in defined Quantities of X. The problem is that it can only be set globally, for all websites / stores. How to change this? Let’s dive in.
Global / per store?
Normal settings with built-in Qty Increments allow only Global setting. No specific settings for B2B or B2C website.
Qty Increments – nice error msg and validation
Magento built-in Qty Increments functionality also support nice error msg if user tries to order different Quantity then specified in Inventory settings.
Why we want to over-come global setting? Because, we want to enable Qty Increments only for B2B website, but not for B2C. This can not be done as attribute is specified as global. There are modules / extension which solves this, but it didn’t work well or shop.ekwb.com, some MySQL problems. No time to solve this, let’s go to the next solution.
Bundle product. Will this solve the problem?
… not quite. The problem is that the new Bundle product has new SKU code, which does not fit quite right at shop.ekwb.com as they would need to create additional SKU/Ident in Accounting system, also problems with stock and so on. Not good one.
What’s left? As always, Magento provides nice options to over-ride base functionality without too much. Two files. app/code/local/Optiweb/StockIncrementQty.php and config.xml. What’s in them?
Simple. We define that we want to overwrite Item.php (Product – Item).
Simple, but effective. Bravo Janez @Optiweb. We create two new attributes (manually in Administration), ow_enable_qty_increments and ow_qty_increments and set them “per store”. In code, we just copy paste the code from original StockIncrementQty.php file and change the default attributes “enable_qty_increments” and “qty_increments” to “ow_” prefix (ow stands for OptiWeb!). That’s it.
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