An explanation of how `required` works.

[SharkFourSix]

System (please complete the following information):

• OS: linux
• GO Version: 1.20
• Pkg Version: 1.4.6

Describe the bug

Not necessarily a bug.

How exactly does required work?

Suppose we have the following case

type Foo {
    Name int `validate:"required|int|between:1,999" label: "name"`
}

foo := &Foo{Name: 4}

v := validate.Struct(&foo)

v.Validate()

I'm getting a validation error name is required to not be empty as if I did not specify the the field Name. If I leave out the required validator it works.

So the question is, when exactly to we need to use the required validator?

Because if I don't specify required are we saying that the field is optional? Or does required only work with pointer types?

Can you please explain the use cases and effects of this. I have just discovered that my validation rules were not running before because I made this PR #202 and that is why I'm confused now.

To Reproduce

Expected behavior

I expect validation to pass when required is specified and when a field has a valid value.

Screenshots

n/a

Additional context

n/a

[inhere]

If not required, it will only be validated if the value is not empty(nil,zero-value).

So without specifying required, it can be said that the field is optional.

[SharkFourSix]

If not required, it will only be validated if the value is not empty(nil,zero-value).

So without specifying required, it can be said that the field is optional.

Alright, but now I'm seeing that when I remove required from a string field, my custom filter and validator function does not get called and I'm ending up passing invalid data which gets accepted, which should not happen 😔