typeorm class validation
import { validate } from "class-validator"
let post = new Post()
post.title = "Hello" // should not pass
post.text = "this is a great post about hell world" // should not pass
post.rating = 11 // should not pass
post.email = "google.com" // should not pass
post.site = "googlecom" // should not pass
const errors = await validate(post)
if (errors.length > 0) {
throw new Error(`Validation failed!`)
} else {
await dataSource.manager.save(post)
}