Rv: Re: [Zope] why a xcatalog keywordindex is mandatory?

[Yurj]

> The ZCatalog treats an empty *string* in a special way to support
> search forms: an empty string is considered as "no restriction".
>
> A ":lines" control does not return a string but a list.
> An empty list is not considered as "no restriction".
>
> What you see here, is a bug in the "AND" implementation
> of "KeywordIndex". An empty list together with the
"AND"
> operator should be interpreted as "no restriction".
> Due to the bug, it is considered as "no results".
> You can use my "ManagableIndex". It comes with a
"KeywordIndex"
> that is correct in this respect.

Thanks! It happens also with OR. If I use a record with operator: 'and', it
acts as or. Don't know why... :)

> >I've tried to change, in the form, COLL with COLL2 and do in the
report
> >script:
> >
> ><dtml-call "REQUEST.set('COLL',_['COLL2'])">
> >
> >but it gives error (Error Type: TypeError
> >Error Value: object has read-only attributes)
>
> Did I already tell you that you *MUST* include tracebacks in
> error reports? You find tracebacks in
"<http://yourZope/error_log>".
> The traceback tells you were the exception was raised.

I've solved with REQUEST.set('COLL', {}) before copyng :)

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