How Do I Limit A Script To Execute Once Per Customer? Script Editor and Shopify

Question

What I want:

• I have created a script in the Script Editor that makes your first line item in a cart free. I want this script to execute once per customer.

My question:

• What is the syntax to limit a script to execute once per customer through the use of the Script Editor app?

Business use case:

• Without adding this functionality to my script, a customer could checkout with 1 item free... but then they could begin shopping again and checkout with a new cart with the first line item free again... that means they could get 10 free items from 10 different checkouts.

Thanks for your time and thoughts!

P.S. Script is in Ruby. Also, Setting up a discount code won't work for my use case.

UPDATE

Thank you for your responses. I will be attempting these suggested updates this week and will post my results soon.

UPDATE 2

So the below suggestions and marked answer were all spot on except for one detail. The script editor keeps on running into some type of error even though the described syntax below is correct. Another stackoverflow answer suggested to use '&'.

So I ended up doing something like this:

customer = Input.cart.customer
if customer&.tags&.include?("gift_received")
...
end

This works for me. Thanks again for all your answers!

Answer 1

Um. You can always just assign a little tag to the customer. For example, if they received this free item, give them a tag on their first order. Now, if they try and fool you nine more times, check for that tag. If they have it, remove the item from checkout. Boom. problem solved.

Answer 2

I have created a script in the Script Editor that makes your first line item in a cart free. I want this script to execute once per customer.

The best way is to flag customers using tags. You can use Shopify flows to add tags to orders containing free gifts to mark customers as the customers who received already free gifts. This will be better than checking Input.cart.customer.orders_count > 0 because it will give you more visibility in the orders & customers panel.

The approach mentioned by @Fabio Filippi is the best however it needs to be secured:

You create a flow that assigns a tag to a customer when they receive a gift. You check for the tag : Input.cart.customer.tags.include?('gift_received') and don't apply the discount.

Business use case:

Without adding this functionality to my script, a customer could checkout with 1 item free... but then they could begin shopping again and checkout with a new cart with the first line item free again... that means they could get 10 free items from 10 different checkouts. Nothing prevents the user from creating a new account so you need to consider some verification logic that will be assigning the gift_received tag after the customer is validated.

If you want to avoid fraud I would consider using both (note that in this case we are checking if customer already bought something in the past) Input.cart.customer.orders_count > 1 and Input.cart.customer.tags.include?('gift_received') OR Input.cart.customer.tags.include?('gift_received') and Input.cart.customer.total_spent > Money.new(cents: 1000). This way you can have "eligible for gift" kind of logic. There are many ways to approach it.

Answer 3

Is it not the same, Vert.x does not create a new Thread for each request. Vert.x has something called Event loop which are managed using few Java threads.

The number of threads used by Vert.x increases as the number of Verticles that you deploy increases, but it will still be very lower in Count.

Also the code in Vert.x is Reactive is executed based on events, so if you are waiting for a event (for example Http Response) you code will be invoked when there is a response available and there is not thread blocked for response.

Check this for more information: https://alexey-soshin.medium.com/understanding-vert-x-event-loop-46373115fb3e