Added nested struct validation

[aneshas]

Added nested struct validation and more descriptive req error message.
Closes #107

Signed-off-by: Anes Hasicic [email protected]

[campoy]

Not sure passing the parent field is really worth it

[aneshas]

I passed in the parent because I added return fmt.Errorf("missing field %v in %v", t.Name, parent.Name()) a parent to a missing field error.
I did it because if you have multiple fields with the same name in a struct and nested structs, the default missing field %v felt non descriptive, you wouldn't know which struct it belongs to. But if you feel like it's too much, I will remove it :)

[campoy]

See the comment on line 760

[aneshas]

Sorry, but I don't understand what that comment should point out me?

[campoy]

That comment is about adding the info about the parent type on the

if err != nil { return ... } 

[campoy]

This is pretty good, but please add tests and address my comments.

Thanks!

[aneshas]

@campoy Thanks, yes I will add tests

[campoy]

Don't pass the type and instead just add the info to the error message.

return fmt.Errorf("%v in %s", err, t)

[aneshas]

👍