Software Engineering

Carts API: Line Items, Totals, and Inventory Snapshots

Introduce shopping carts and cart items. You’ll create carts, add and update items, and return computed totals. This module establishes the data flow that powers checkout in the final module.

PostgreSQL

Remix

TypeScript

See path

3 lessons

12 practices

2 hours

Course details

Managing Shopping Carts

Preview

Observe how carts are created and fetched with totals

Implement POST /api/carts to create a cart

Implement GET /api/carts/:id to return items and totals

Validate cart id and map errors correctly in the loader

Previous Course Next Course: Orders API: Checkout Workflow and Order State Transitions

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Francisco Aguilar Meléndez

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From our community

Hear what our customers have to say about CodeSignal Learn

I'm impressed by the quality and can't stop recommending it. It's also a lot of fun!

Francisco Aguilar Meléndez

Data Scientist

+11

I love that it's personalized. When I'm stuck, I don't have to hope my Google searches come out successful. The AI mentor Cosmo knows exactly what I need.

Faith Yim

Software Engineer

+14

It's an amazing product and exceeded my expectations, helping me prepare for my job interviews. Hands-on learning requires you to actually know what you are doing.

Alex Bush

Full Stack Engineer

I'm really impressed by the AI tutor Cosmo's feedback about my code. It's honestly kind of insane to me that it's so targeted and specific.

Abbey Helterbran

Tech consultant

I tried Leetcode but it was too disorganized. CodeSignal covers all the topics I'm interested in and is way more structured.

Jonathan Miller

Senior Machine Learning Engineer

+12

I'm impressed by the quality and can't stop recommending it. It's also a lot of fun!

Francisco Aguilar Meléndez

Data Scientist

+11

Carts API: Line Items, Totals, and Inventory Snapshots

Course details

Unit 14 practices32 min

Unit 24 practices32 min

Unit 34 practices32 min

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