Q: Does Ecto merge carts?

No. Ecto does not merge carts. Ecto always keeps one cart per customer: the last edited cart. If a customer edits their cart on another device, that cart simply replaces the previous one. There is no combination of products, quantities, or cart contents. This behavior is intentional. Ecto is designed to be invisible, predictable, and conflict-free, without popups or cart selection. If cart merging is required for your use case, Ecto may not be the right fit.

Question 1

How Ecto decides which cart to keep

Accepted Answer

Ecto is designed to keep cart synchronization simple, invisible, and predictable. To do that, it follows a clear rule: 👉 Ecto always keeps the most recently edited cart for a logged-in customer. At any time, only one cart per customer is stored.

When a cart is saved

Ecto saves carts only for logged-in customers. Once a customer is logged in, Ecto listens to cart actions such as:

adding a product
updating quantities
removing items Each of these actions updates the cart’s last modification time, which Ecto uses to determine which cart is the most recent.

What happens before login

If a customer creates or edits a cart before logging in:

the cart exists only on the customer’s device
no cart data is sent to Ecto yet
Ecto cannot associate the cart with a customer This cart is not immediately considered the active cart.

What happens at login

When the customer logs in, Ecto compares the two cart versions:

the cart currently on the customer’s device
the cart already saved in Ecto If the cart saved in Ecto is more recent, it is restored on the customer’s device. Otherwise, the cart on the customer’s device becomes the new saved reference. This comparison ensures that the most relevant cart is always kept.

Cross-device example

A customer builds a cart on desktop at 10:00 while logged in → Cart A is saved in Ecto
On mobile, the customer adds items at 10:10 before logging in → Ecto is not aware of this car

Question 2

Does Ecto merge carts?

Accepted Answer

No. Ecto does not merge carts.

Ecto always keeps one cart per customer: the last edited cart.

If a customer edits their cart on another device, that cart simply replaces the previous one. There is no combination of products, quantities, or cart contents. This behavior is intentional. Ecto is designed to be invisible, predictable, and conflict-free, without popups or cart selection.

If cart merging is required for your use case, Ecto may not be the right fit.

Frequently Read Articles

Browse All Categories