shopping options with different price based on options

I have a cart for a coffee roaster that I'm modifying to give the shopper a couple of different options. The options are:

Ground or Whole Bean
I created a table called Grind with ID 1 = Ground and ID 2 = Whole Bean

Size - Two sizes of bags -- 4oz and 12oz
I created a table called Size with ID 1= .75 (3/4 of a lb) and ID 2= .25 (1/4 of a lb)

So for each product the customer would choose:

a) ground or whole bean
b) 4oz or 12oz bag

Right now I have a separate record for each size so when the customer comes to the site they see the same product listed twice -- the only difference being the size and price. My customer wants there to be just one product listed and have the ability to select the size with a select list. If I create the record set for size, how would I handle the different price for the 4oz and 12oz bag?


I'm using the Recipe 6 "Database-driven Shopping Options" which uses the shoe store with Men's and Women's sizes and different colors. I think it's more complex than what I'm trying to do but I'm getting hung up when it says to copy and paste the snippet. It doesn't seem like I need to do that -- but I'm not sure and so I don't want to go further with that.

So I guess my fundamental questions are:

Don't I just need the two record sets and thus two select lists (one for "size" and one for "grind")?

And how do I get the correct price associated with the appropriate size?

where your options are so limited, I dont think I would use a recordset. I would just enter the 2 sizes and the two grinds manually as static items in the list.

For the price, there are a couple of way to go. Probably the simplest is to create a new column in your eCaret object that you can send the large bag price to. you could call it "lgPrice" in the add to cart button, pass the 1/4 pund bag price to the Price column and the amount extra to charge for the 3/4 pound bag to the lgPrice column.

so if a 1/4 pund bag is $4 and the 3/4 pund bag is $9, you will pass 4 to the price column and 5 to the lgPrice column

Next, on the eCart object tag, create a calculation that will be used to determine the price to apply the product, call it realPrice. If the size that is passed for the 3/4 pound bag is "3/4 of a lb" the calculation will look like:
(([size] = "3/4 of a lb")?[Price] + [lgPrice]:[Price])

you then have to modify the total Price calculation:
[Price] * [Quantity]


to:
(([size] = "3/4 of a lb")?[Price] + [lgPrice]:[Price]) * [Quantity]


You will want to change the cart display to use the realPrice column in place of the price column, and change the checkout code top pass the realPrice to the gateway in place of the price.

I'm not sure I'm following you.

(In your calculation, is there supposed to be a "?")

So if I used your calculation for the large bag, would this be correct?

(([1] = ".75")?[4] + [5]:[9]) * [Quantity] -- my interpretation of your calculation

(([size] = "3/4 of a lb")?[Price] + [lgPrice]:[Price]) * [Quantity] -- your calculation


But if I do all that, why is it not possible to just have two price fields for each product (LgPrice and SmPrice)? Is it because the calculation uses both fields regardless if the person chooses small or large?

Also, how should I handle the different weights?

the calculation is a ternary expression that takes an argument and has a condition for true or false. The end of the argument is the question mark, the true and false conditions are separated by the colon.,the syntax simplified is:
((argument)?if true:if false)


The calculation is supposed to use your cart column names, not the actual values. if the value being passed by the size list is one for the 3/4 pound bag, then the calculation should be:
(([size] = "1")?[Price] + [lgPrice]:[Price])

this would interprate to:
(("1" = "1")?4 + 5:4)


this is saying: if the Size is 1, use Price + lgPrice, else use just price

you could certainly have the small full price in the price column and the large price in the lgPrice column and change the calculation to:
(([size] = "1")?[lgPrice]:[Price])



for the weight, you will need to do something similar, create a lgWeight column and modify the total weight calculation:
(([size] = "1")?[lgWeight]:[Weight]) * [Quantity]

Excellent explanation. Thank you, Jason.

I think I understand. I'll let you know if I don't.

Tim