How to add Joi validation to a input file for uploading image

Question

I have a input file to upload image with multer. I want to add Joi validation to this Input for uploading images only , Im working with Node.js and Express.js Code :

let schemaValidation = Joi.object({
    name: Joi.string().trim().min(1).required(),
    description: Joi.string().trim().min(1).required(),
    price: Joi.number().positive().required(),
    image: ???????,
    category: Joi.string().trim().min(1).required(),
})

hlymrk · Accepted Answer · 2025-11-03 12:35:50Z

0

you can pretend it's not a file either keep it this way:

let schemaValidation = Joi.object({
    name: Joi.string().trim().min(1).required(),
    description: Joi.string().trim().min(1).required(),
    price: Joi.number().positive().required(),
    image: Joi.any().optional(),
    category: Joi.string().trim().min(1).required(),
})

or use this instead:

let schemaValidation = Joi.object({
    name: Joi.string().trim().min(1).required(),
    description: Joi.string().trim().min(1).required(),
    price: Joi.number().positive().required(),
    image: Joi.any()
    .optional()
    .label("Image File")
    .messages({
      "any.required": "Please upload an image",
    }),
    category: Joi.string().trim().min(1).required(),
})

answered Nov 3 at 12:35

hlymrk

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