.string() method validate all type values

[alifuma92]

Prerequisites

• [X] I have written a descriptive issue title
• [X] I have searched existing issues to ensure the bug has not already been reported

Fastify version

4.1.0

Plugin version

3.1.0

Node.js version

16.14.12

Operating system

macOS

Operating system version (i.e. 20.04, 11.3, 10)

Monterey

Description

i try to validate my body prop "name" as a required string, but if i sent a number value from POSTMAN json, i've got an successful validation... it's very strange.

Steps to Reproduce

S.prop('name', S.string().required())

Expected Behavior

No response

[Eomm]

It is not because the value is coerced.

https://github.com/fastify/fastify/blob/main/docs/Reference/Validation-and-Serialization.md#validation

Try:

const fastify = Fastify({
  ajv: {
    customOptions: {
      coerceTypes: false
    }
  }
})

[aboutlo]

Not related to fluent-json-schema