Experiments for dynamic constraints

[danjoa]

Experimental Dynamic Constraints

This example demonstrates how to use dynamic constraints in a CAP application. It includes a service definition and a test setup to validate the constraints.

Prerequisites

You've setup the cap/samples like so:

git clone -b dynamic-constraints -q https://github.com/capire/samples cap/samples
cd cap/samples
npm install

Testing

Test like that in cds.repl from cap/samples root:

cds repl --run tests/dynamic-constraints

await AdminService.create ('Books', {})
await AdminService.create ('Books', { title:'   ', author_ID:150 })
await AdminService.create ('Books', { title:'x' })

await cds.validate (Books.constraints, 201)
await cds.validate (Books.constraints)

await AdminService.read `ID, title, price, fc.price from Books`