Made it possible to have multiple preparers.

[jayd3e]

Still need to write tests/docs for this feature. Just curious if there was an api reason for this feature not getting implemented yet. All tests pass. With this feature, you are now able to provide the preparer kwarg with a list of preparers, as opposed to a single one, like so:

class SolutionSchema(MappingSchema):
      post_id = SchemaNode(Int())
      body = SchemaNode(String(),
                        validator=Length(15, 3000),
                        preparer=[strip_whitespace,
                                  remove_multiple_spaces,
                                  remove_multiple_newlines])

[jayd3e]

Looks like I removed some whitespace too XD.

[mcdonc]

When you say "yet", do you mean it was suggested before? The feature seems fine (although small nit, always a little hinky to test for "is list" or so.. usually better to check for iter, although it's tricky on py3, there's a is_nonstr_iter func in compat).

[jayd3e]

I couldn't find an issue where it was being suggested, yah dunno what I really meant by that in hindsight. Check out that latest commit, is that what you meant? Err and I just saw your note about is_nonstr_iter. Should I use that instead?

[jayd3e]

Yah nvm, need to use that.

[jayd3e]

@mcdonc This should be ready to go.

[mcdonc]

Thanks Joe! (next time try to go a little lighter on the whitespace changes, though eh? ;-) )

[mcdonc]

Hey Joe when you get a chance could you submit a different pull request and sign colander's CONTRIBUTORS.txt?