Software Engineering

Orders API: Checkout Workflow and Order State Transitions

Finish the backend with checkout and orders. You'll convert carts into orders transactionally and implement order listing plus state transitions (pay/cancel). The last unit aligns the code with the full course outcome.

Nextjs

PostgreSQL

TypeScript

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3 lessons

12 practices

2 hours

Course details

From Cart to Order

Preview

Observe checkout creating an order

Implement minimal transactional checkout

Validate and decrement inventory during checkout

Compute tax + totals for the created order

Previous Course Next Course: Tax API: Country-Based Rates and Checkout Snapshots

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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.

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Francisco Aguilar Meléndez

Data Scientist

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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

Orders API: Checkout Workflow and Order State Transitions

Course details

Unit 14 practices32 min

Unit 24 practices32 min

Unit 34 practices32 min

Turn screen time into skills time

Join the 1M+ learners on CodeSignal

From our community

From our community