Models & Active Record in Rails

Models are where Rails turns rows into objects you can work with. For AI products, this matters fast: conversations, prompts, documents, embeddings, jobs, and users all become models. If you understand Active Record, you can move from “toy demo” to “real app” without fighting your database. In this post, we’ll build a tiny knowledge base with User, Project, and Document models. You’ll see migrations, queries, and associations you’ll use constantly. Start with the models Generate thr