Tiered pricing and quantity Increments do not work with decimal inventory

[duffner]

Preconditions

1. Magento 2.2.2
2. PHP 7.0
3. MySQL 5.6

Steps to reproduce

Tiered Pricing Issue:

1. Create Simple Product
2. Set Inventory to 100
3. Set "Qty Uses Decimals" in Advanced Inventory to "Yes"
4. Set Base Price to 3.99
5. Open Advanced Pricing tab
6. Set a Tiered Price for Qty of .5 and price of 2.99
7. Save

Quantity increment issue:

1. Open Advanced Inventory
2. Set "Enable Qty Increments" to "Yes"
3. Set "Qty Increments" to ".5"
4. Save

Expected result

1. During each of the above scenarios, the product should save and allow tiered pricing and qty increments to work with decimal-based inventory

Actual result

1. Product does not save, admin user is given error stating "Please enter a valid number"

This feature works as expected in Magento 1 EE, and is the basis for many of our customers who sell by .5, .25 lb increments but inventory by the 1lb of product. This prevents a customer from selling .25 lbs for $3.00 but selling 1lb for $10.00 as tiered pricing does not allow decimals. Additionally, since many customers sell in quantity increments under 1, a user should not be able to order .001 lbs as it's too little to measure.

[duffner]

For reference, an Enterprise Support ticket was also filed: Ticket #03228956

[magento-engcom-team]

@duffner, thank you for your report.
We've created internal ticket(s) MAGETWO-86164 to track progress on the issue.

[duffner]

AdditIonal note: This same issue also affects bundle product options. If you add a simple product that allows decimal inventory to a bundle product’s bundle options the same “please enter a valid number in this field” error appears.

[vasilii-b]

Hi!
@duffner , I'm on my way of fixing this.

During issue solving I also found that after saving the product with Qty Decimals enabled, Qty Increments and Tier Price Quantity are integer numbers. This will be fixed as well.

@magento-engcom-team, could you please assign the issue to me ?

Thanks & Cheers!

[duffner]

@vasilii-b, awesome! I appreciate your quick response! 👍

[duffner]

@vasilii-b, it also appears that your noted issue with integer vs decimal numbers affects the front-end in the same way, e.g. mini cart and checkout

[vasilii-b]

Thanks for letting me know, @duffner