Required if optional parent is present

[alexbowers]

Hi,

I was wondering how to set it up so that if the parent is present, then a field is required.

I have tried the following:

type Dependencies struct {
	Database DatabaseDependency `validate:"omitempty"`
	Cache    CacheDependency    `validate:"omitempty"`
}

type DatabaseDependency struct {
	Engine string `validate:"required"`
}

type CacheDependency struct {
	Engine string `validate:"required"`
}

And then validating it like this:

func TestRequiredWithParentWhenParentIsNotPresent(t *testing.T) {
	structure := &Dependencies{}

	err := validator.New().Struct(structure)

	assert.NilError(t, err)
}

however, it gives me the error: Key: 'Dependencies.Database.Engine' Error:Field validation for 'Engine' failed on the 'required' tag