campJoiSchema = Joi.object({ campground:Joi.Object({ //this line u have forget bcz u r accessing //campground array title: Joi.string().min(3).max(50).required(), price: Joi.number().integer().required(), description: Joi.string().min(3).max(100).required(), location: Joi.string().required(), image: Joi.string(), }).options({stripUnknown:true}).required() });