How to validate based on value (union or variant struct support)

[mortymacs]

Hi,

I have a data structure that needs validation based on values of the ActionType field.

type AddressTypeAttr struct {
	PostalCode  string `json:"postalCode"  binding:"required"`
	HouseNumber uint16 `json:"houseNumber" binding:"required"`
}

type PersonTypeAddr struct {
	ID string `json:"id" binding:"required"`
}

type Body struct {
	ActionType string          `json:"actionType"        binding:"required"`
	Person     PersonTypeAddr  `json:"person,omitempty"  binding:"required_without=Address"`
	Address    AddressTypeAttr `json:"address,omitempty" binding:"required_without=Person"`
}

For example, if the ActionType is "user" then, the Person struct fields are mandatory; otherwise, the Address struct fields are mandatory.

I tried with these tags, but when I send an address-type request, it says "Person.ID is required", while I mentioned required_without=Address for the Person struct.

Would you please guide me on how to address this issue?