Comments (3)
It would be wonderful if I could add a placeholder to a zope.schema field.
Or any other htmattribute for that matter.
Can you provide an example what you mean by placeholder?
You could look at the tag
module of dm.zope.schema and the related example in the example section. It uses the "tagged values" concept of zope.interface
to add additional information to zope.schema
fields. I use it in dm.zope.reseller
to enhance schemas with information relevant for the management of corresponding data records in a relational database.
from zope.schema.
It's also possible (though probably not recommended --- I would stick with tags) to add new attributes to stock fields; these values are copied into bound instances (binding copies the __dict__
values to the bound object):
>>> from zope.schema import *
>>> from zope.interafce import Interface
>>> from zope.interface import Interface
>>> class IFoo(Interface):
... field = Bytes(title='a bytes')
... field.placeholder = 'my placeholder'
...
>>> IFoo['field'].placeholder
'my placeholder'
>>> IFoo['field'].bind(object()) is IFoo['field']
False
>>> IFoo['field'].bind(object()).placeholder
'my placeholder'
from zope.schema.
Closing since there've been no updates.
from zope.schema.
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from zope.schema.