Module 6 — CRUD: the four operations behind every app

Strip the branding off almost any business application and you find the same skeleton: records are Created, Read, Updated and Deleted. Module 6 built that skeleton by hand, and it was the longest module in the course for a reason the lesson list makes obvious.

CRUD — Create, Read, Update, Delete — is the complete lifecycle of a piece of data. Master the four operations plus the presentation layer (search, sort, filter, paginate) and you can build the core of nearly any business tool.

Why “Read” took thirty lessons

Create, Update and Delete are single actions. Read is a product. Students built a contact manager and discovered what every professional knows: showing data well is where the work lives. The build covered a sortable table header (with conditional arrows, URL-friendly sort state, and a word of caution about premature cleverness), search, filters, and pagination built from scratch — page state held in the URL, chevrons greying out at the ends, correct counts displayed, test data generated to prove it. Then the single-record view, update via workflows and via auto-binding (with a redirect trick to set default page values), and delete — with a note on why the obvious solution isn’t always the right one.

The lesson under the lessons

Building pagination by hand teaches something no component library can: what the machinery is. Once you’ve held page state in a URL parameter and computed “greyed-out chevron” conditions yourself, every data grid you ever meet — in any framework — is legible to you.

Try it yourself

Build the smallest possible contact manager: one data type (name, email, company), a create form, a list with search and one sort, an edit view, a delete with confirmation. No styling until it works. This single exercise contains more real app development than most tutorials deliver in total.

This skill in the AI era

Ask an AI for “a contacts table with search and pagination” and you’ll get one — but only a builder who’s done Module 6 can review it: is sort state shareable via URL? Does delete confirm? Does the empty state exist? CRUD literacy is what turns AI output from plausible to production. It’s the first thing we check when rescuing struggling apps, and the foundation of everything we build with AI today. The full story here.