Allow to translate errorr messages originating from colander schemas

[sq9mev]

As for now, colander's (1.0b1) Invalid.asdict method which is used in schema._validate_fields Return a dictionary containing a basic (non-language-translated) error report for this exception, additionaly there's fixed string ""%s is missing"" in this function.

If colander itself provides translations, it'd be great to have this feature in cornice as well.

What i've found is:
https://groups.google.com/forum/#!topic/pylons-discuss/f10m24zyVeo
This solution involves probably monkey patching of colander's Invalid.asdict itself, so seems to be pretty ugly.

Any hint how to achive translated colander errorr strings in cornice?

[ghost]

I have this problem too. Colander documentation doesn't say much about this but my initial thought was that it was a Colander issue rather than a Cornice issue.

[sq9mev]

@amarandon not exactly, this is just how colander works: https://github.com/Pylons/colander/blob/master/colander/__init__.py#L168 , however error translatable error messages are available another way, so cornice should use them instead Invalid.asdict() method probably.

[almet]

Having translated error messages would indeed be useful,

As @amarandon pointed out, I think this is a colander issue, not a cornice issue, since cornice doesn't deal with translations. If the translation is done upstream, in the asdict() method, then cornice would just pick it up.