fastify-validation not work.

runner.js

// Require the framework and instantiate it
const fastify = require('fastify')({
  logger: true
})

const post_schema = {
	method: 'GET',
	schema: {
		body: {
			type: 'object',
			properties: {
				public_key: { type: 'string' }
			},
			required: ['public_key']
		}
	}
}

// Declare a route
fastify.post('/',{ schema: post_schema, attachValidation: true }, function (request, reply) {
	if (request.validation) {
    // `req.validationError.validation` contains the raw validation error
    reply.code(400).send(request.validationError)

  }else{

  reply.send({ hello: request.body  })

  }
  
})
fastify.get('/',{ schema: post_schema, attachValidation: true }, function (request, reply) {
  reply.send(fastify.getSchemas())
})
// Run the server!
fastify.listen(3000, function (err, address) {
  if (err) {
    fastify.log.error(err)
    process.exit(1)
  }
  fastify.log.info(`server listening on ${address}`)
})