maxLength

Enforces the value to have maximum length as per defined by the rule. The rule can only be applied to string or an array schema type.

In the following example, the username with greater than 40 characters will fail the validation.

import { schema, rules } from '@ioc:Adonis/Core/Validator'

{
  username: schema.string({}, [
    rules.maxLength(40)
  ])
}

Following is an example of applying the maxLength rule on an array.

{
  tags: schema
    .array([
      rules.maxLength(10)
    ])
    .members(schema.string())
}

Custom messages options

The maxLength validation rule passes the maxLength option to custom messages.

{
  'maxLength': 'The array can contain maximum of {{ options.maxLength }} items',
}