Validation libraries tend to have a way to pass some user-defined state down through the validators. It looks like in formencode you can do this as well via the state argument . You would likely want to pass a dict down containing either the request or the dbsession and then your validators can access that attribute of the state.
 http://www.formencode.org/en/latest/Validator.html#state On Sun, Apr 8, 2018 at 8:35 AM, André Prado <andreprad...@gmail.com> wrote: > Hi folks, > > I want to make a schema + a form connecting to SQLAlchemy and be able to > identify if an username is unique and emails are unique. I am using these > as a base: > > https://docs.pylonsproject.org/projects/pyramid-simpleform/en/latest/ > https://github.com/thruflo/pyramid_simpleauth/blob/ > master/src/pyramid_simpleauth/schema.py#L212 > https://github.com/thruflo/pyramid_simpleauth/blob/ > master/src/pyramid_simpleauth/model.py#L290 > > For example, > > class Signup(formencode.Schema): > """Form fields to render and validate for signup.""" > > allow_extra_fields=True > filter_extra_fields=True > username = UniqueUsername(not_empty=True) > email = UniqueEmail(resolve_domain=False, not_empty=True) > password = Password(not_empty=True) > confirm = Password(not_empty=True) > chained_validators = [ > validators.FieldsMatch( > 'password', > 'confirm' > ) > ] > > > In the example from simpleauth he has a function called get_existing_user > that UniqueUsername is calling in the _validate_python method. > > However the get_existing_user is accessing a global SQLAlchemy session > which is always exposed: https://github.com/thruflo/ > pyramid_basemodel/blob/master/src/pyramid_basemodel/__init__.py#L54 > > I wanted to use what the current Pyramid documentation suggests, which is, > having a request.dbsession that you propagate through your code instead of > a global variable. > > For example: https://github.com/Pylons/pyramid-cookiecutter-alchemy/ > blob/latest/%7B%7Bcookiecutter.repo_name%7D%7D/%7B%7Bcookiecutter.repo_ > name%7D%7D/models/__init__.py#L52 > > > Is there any way to make pyramid_simpleform / formencode receive the > request.dbsession? > > I couldn't figure out from the docs, tried some parameters like state and > extra but no juice. In the end I did something like: > > from pyramid.threadlocal import get_current_request > request=get_current_request().dbsession > > Which the Pyramid docs tells not to do and I don't want to. > > Thanks! > > > > -- > Atenciosamente/Regards > André Castelan Prado > > -- > You received this message because you are subscribed to the Google Groups > "pylons-discuss" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to pylons-discuss+unsubscr...@googlegroups.com. > To post to this group, send email to firstname.lastname@example.org. > To view this discussion on the web visit https://groups.google.com/d/ > msgid/pylons-discuss/CAG%3D2wZeJ3SbCmFbfhdOvPE1aJ9f% > 3DPYrF8YAx%2BN5A7fWd%3DFhsMg%40mail.gmail.com > <https://groups.google.com/d/msgid/pylons-discuss/CAG%3D2wZeJ3SbCmFbfhdOvPE1aJ9f%3DPYrF8YAx%2BN5A7fWd%3DFhsMg%40mail.gmail.com?utm_medium=email&utm_source=footer> > . > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "pylons-discuss" group. To unsubscribe from this group and stop receiving emails from it, send an email to pylons-discuss+unsubscr...@googlegroups.com. To post to this group, send email to email@example.com. To view this discussion on the web visit https://groups.google.com/d/msgid/pylons-discuss/CAKdhhwG5geVvmRbW_2kq%3D55EEKoNZVLDqnV_5SUUabM8SS8pbw%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.