Magento 1.8 order product quantity per 0.1 decimals

Question

I’m using Magento 1.8 and I am amazed that I cannot get the system to allow orders of 0.1 quantity. I’m building this store to sell fabrics, per 10 cm’s. So that would be 0.1 meters and I do not want the quantity to represent centimeters to avoid long numbers and customers ordering something in 251 cm’s.

I’ve tried the qty_increment field in the Admin > System > Configuration > Inventory but it only accepts full integers.

What I’ve tried so far:

1. http://www.magentocommerce.com/boards/viewthread/228756/ <- same bug in Magento 1.5 but produces big fat PHP error in 1.8.

2. think about making all the fabrics a configurable product, but this would mean creating a selection pull down list from 0.1 to 25.0 or so in steps of 0.1 ... very ugly IMHO.

Anybody know how to solve this or is Magento simply not meant for this?

Answer 1

I actually found the solution, you CAN do this in the Backend by going to

Product > Manage products > Select a product > Inventory > Enable Inventory > Enable Quantity uses Decimals > Stepsize 0.1

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_{Note: Product price MUST be over 1 euro/dollar/any currency, or it won't work.}

Answer 2

I would suggest using "mm" (a smallest possible unit) as a base and then modify input/output so your visitors insert it in any convenient way. Input can be easily customised through JavaScript.