Exists

Check if the input value exists in the database.

This rule is a database dependent rule. It requires a database connection to run against the input value.

The validation rule requires a value to run against the input value.

For the time being, this rule does not support custom string rule, so the rule class must be called directly.

Example

src/app/users/controllers/login.ts

// ...
import { ExistsRule } from "@warlock.js/core";
import { User } from "../models/user";

login.validation = {
  rules: {
    email: ["required", "email", new ExistsRule(User, "email").insensitive()],
  },
};

Extends Unique

Please note that the exists rule extends Unique Rule so any method available in the unique rule is also available in the exists rule.