Carts API: Line Items, Totals, and Inventory Snapshots

Software Engineering

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

Nextjs

PostgreSQL

TypeScript

See path

3 lessons

12 practices

2 hours

Course details

Creating and Viewing Carts

Preview

Observe Cart Creation and Retrieval

Implement Cart Creation

Implement Cart Retrieval with Totals

Harden GET /api/carts/:id

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

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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