Require integer to exist and let it equal 0

[veeral-patel]

Hi, thanks for this great library! So I know that the 'required' struct tag raises an error if you provide an integer that equals 0.

I know why this is the case -- the zero value for integers is, well, 0, so it's impossible to tell whether a value is 0 because it's missing or because it's provided and its actually 0. To error on the side of caution, govalidator decided to not allow 0 values for integers.

If I wanted to write a custom rule, however, that required a struct to have a certain integer field, which is allowed to be 0, how would I go about doing that? Any advice?

[veeral-patel]

@thedevsaddam I found a similar issue: #9

Where you linked to this page: https://github.com/thedevsaddam/govalidator/blob/master/doc/SIMPLE_STRUCT_VALIDATION.md

However, I didn't see anything on this page that would solve my problem! Perhaps it is out of date?

Thanks again!

[thedevsaddam]

Probably you can use min:numeric rule

[veeral-patel]

@thedevsaddam Thanks for your reply! Sorry for closing/reopening this ticket on accident.

Here are my validation rules:

	validator := govalidator.New(govalidator.Options{
		Data: &requestBody,
		Rules: govalidator.MapData{
			"title":      []string{"required", "max:255"},
			"x":          []string{"required", "min:0", "max:11"},
			"y":          []string{"required", "min:0"},
			"w":          []string{"required", "min:1", "max:12"},
			"h":          []string{"required", "min:1"},
			"panel_type": []string{"required", "max:255"},
		},
	})

And here's the errors I get from govalidator:

Note that I provided a value for x and y (0) but govalidator tells me x and y are required.

If I set x to any integer >= 1, then I don't get this "field is required" error in the two fields. I think what's happening is that required requires integers to not be 0 (as per the README).

In my example, how can I require the x field but also allow it to be 0?

[thedevsaddam]

Can you please share the data struct that you are using