[Zope-dev] zope.schema validation can create read/write conflicts

[Souheil CHELFOUH]

Done and commited.
If anyone can and want to release, it's ready.

2010/12/23 Tres Seaver <tseaver at palladion.com>:
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> On 12/22/2010 05:48 PM, Souheil CHELFOUH wrote:
>> Hello,
>>
>> I've been experiencing, for quite some time, now, read/write conflicts
>> in my projects.
>> I've decided to hunt the problem down and it brought me down to the
>> field validation in zope.schema.
>>
>> My use case is the following :
>>
>> class SomeAdapter(object):
>>    my_object = FieldProperty(ISomeInterface['my_object'])
>>
>>    def __init__(self, context):
>>        self.my_object = context
>>
>>
>> If "my _object" from ISomeInterface is an Object field and has a
>> 'schema' property, zope.schema will validate it.
>> The validation code writes an attribute on the value that is being
>> validated and therefore can create a read/write error.
>>
>> The incriminated code is here :
>> http://svn.zope.org/zope.schema/trunk/src/zope/schema/_field.py?rev=111614&r1=110535&r2=111614
>>
>> In my case, the value was an OOBTree and that caused a lot of read/write errors.
>> Can we do something about this validation code ?
>> Could it be a possible solution to change the "__validating_schema"
>> attribute into a _v_ attribute, to avoid the persistency ?
>>
>> Thank you for reading me.
>
> +1.
>
>
> Tres.
> - --
> ===================================================================
> Tres Seaver          +1 540-429-0999          tseaver at palladion.com
> Palladion Software   "Excellence by Design"    http://palladion.com
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