Adding Minimum Quantity

Is there an easy way to add a variable that is a minimum quantity in an order? It doesn't look like that's an option on the "add to cart" server behavior...

An example would be we sell booklets but I want a minimum of 20 for booklet 1 and 1 for booklet 2...

Any suggestions?

Ted

The easiest non-coding solution would be to sell them in lots of 20.

So quantity of 1 would get them 20, quantity 2 would get them 40, etc.

Would the coding option be an extra column in the database (eg minQuantity) and then when adding the "add to cart" button, in the bindings/default value, click on the lightning bolt and select the "minQuantity" column?

If you try to limit the quantity with the add to cart like this you can have problems if the user updates their quantity to less than 20 in the cart. This is why it is best to use a unit type of quantity where 1 unit equals 20 items. You can just add some helper text to your page to inform the user that they are ordering this item in units of 20.