Using the constraints features UniqueConstraint is preferred over unique_together.

setup: The function with your Effect’s logic. Your setup function may also optionally return a cleanup function. When your component is added to the DOM, React will run your setup function. After every re-render with changed dependencies, React will first run the cleanup function (if you provided it) with the old values, and then run your setup function with the new values. After your component is removed from the DOM, React will run your cleanup function.

Context is a feature of React, a popular JavaScript library for building user interfaces, that enables components to share data without passing props down manually at every level of the component tree.

You can use all the context APIs, such as createContext, useContext, and Provider, in your Client Components.

createContext lets you create a context that components can provide or read.