Best way to combine string, built in tag and custom tag?

[onattech]

• [x] I have looked at the documentation here first?
• [x] I have looked at the examples provided that may showcase my question here?

Package version:

v10

Issue, Question or Enhancement:

What is the best way to combine built and tags with my custom tags? I need to setup a validation for acceptable extensions. Which are pdf, zip, image, video.

So, pdf and zip will be string values, image will be the built in image tag, and video will be a custom tag I need to build with mov,mkv,mpg,mp4

What is the best way to combine these?

Thank you

[deankarn]

If you mean for the same field into one then you can register an alias which combines one or more individual validation tags into one https://github.com/go-playground/validator/blob/master/validator_instance.go#L251

[onattech]

Thank you for the quick response. Here's what I got. Video extensions do work but image extensions don't. I was hoping built in image tag would work here.

    // video (common video formats)
    _ = validate.RegisterValidation("video", func(fl validator.FieldLevel) bool {
        return regexp.MustCompile(`(?i)(mp4|avi|mkv|flv|mov|wmv)$`).MatchString(fl.Field().String())
    })

    validate.RegisterAlias("extension", "video|image")

[onattech]

Ok, I just test the image tag by itself and I can't get it to work. I am trying both image/bmp and bmp, no avail.

Here's how I am declaring it

Extension string `validate:"required,image"`

[onattech]

Assigned the image tag manually and it all work now.

    _ = validate.RegisterValidation("image", func(fl validator.FieldLevel) bool {
        return regexp.MustCompile(`(?i)(bmp|gif|ief|jpeg|jpg|png|svg|tiff|webp)$`).MatchString(fl.Field().String())
    })