[Zope] Search a Catalog in Python

[Andre Meyer]

Hi Andreas

Sorry for making a mess out of this! It appeared that my mail didn't get 
sent yesterday and now it is on the list multiple times.

Another mistake of mine: I was searching for an item that was not 
indexed... the result was that all items got returned.

In fact, my version with search() does work now and I know why after 
having looked deep into UnIndex.py (_apply_index()).

But, is it the case that searchResults() is preferred to search() ? Why?

Sorry for the trouble and thanks for the help
Andre

PS My current version is:

    request = {'id':item}    # NB 'id' must be a key in at least one of 
the indexes of the catalog
    obj = self.Catalog.search(request)


Andreas Jung wrote:

> If there is something going wrtong than you should provide error 
> messages and tracebacks.
> The only thing I see is the use of the search() method instead of 
> searchResults().
>
> -aj
> --On Samstag, 13. März 2004 19:12 Uhr +0100 Andre Meyer 
> <meyer at acm.org> wrote:
>
>> Dear Zopers
>>
>> This time, I thought it should be simple, but I am struggling again:
>> The idea was to search for items that have been catalogued successfully.
>> In the Zope Book they describe how to do this using form and scripts.
>> That works for me, too, but then I need to search in a regular Python
>> program (An FS product).
>> For this purpose, I found the ZCatalog.search method and gave it a try,
>> but I cannot get it to work. It expects a dictionary, but what does that
>> contain?
>>
>> Here is what I have so far:
>>
>>   __init__(self, id, title, ...):
>>      ...
>>       # add a Catalog
>>       _catalog = ZCatalog('Catalog')
>>             # add Metadata fields for the Catalog
>>       _catalog.addColumn('id')
>>       _catalog.addColumn('title')
>>       _catalog.addColumn('icon')
>>
>>       # PathIndex
>>       _catalog.addIndex('path_index', 'PathIndex')
>>
>>       # ZCTextIndex (with the required Lexicon)
>>       class Extra:
>>           """ Just a dummy to build records for the Lexicon.
>>           """
>>           pass
>>       extra = Extra()
>>       extra.index_type = 'Okapi BM25 Rank'
>>       extra.lexicon_id = 'Lexicon'
>>       _catalog._setObject('Lexicon', PLexicon('Lexicon', '', Splitter(),
>> CaseNormalizer()))
>>       _catalog.addIndex('title', 'ZCTextIndex', extra)
>>
>>       # FieldIndex
>>       _catalog.addIndex('composer_first_name_index', 'FieldIndex',
>> 'first_name')
>>       _catalog.addIndex('composer_last_name_index', 'FieldIndex',
>> 'last_name')
>>       _catalog.addIndex('composer_year_of_birth_index', 'FieldIndex',
>> 'year_of_birth')
>>
>>       self._setObject('Catalog', _catalog)
>>
>>       ...
>>
>>       # all new items get catalogued (verified) and now
>>       # we should be able to search for them like this:
>>       def searchForAnItem(item)
>>           obj=self.Catalog.search(last_name_index={'query': ['Aaa']})
>>
>>
>> What is wrong here? I feel very stupid again. Any help is appreciated!
>>
>> Thanks and kind regards
>> Andre
>>
>>
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