[Zope] How to catalog ExtFile objects with TextIndexNG2?

[nicogrubert at arcor.de]

Hi there, 

I have written a class called 'DZ_Document' which is derived from File to create File objects in Zope 
with a few additional attributes like 'group', 'author', 'keywords' and so on.

I would like to catalog the new attributes as well as the file content of the uploaded file (e.g. a PDF document) 
to provide a full text search. 
I have created a ZCatalog 'DZCatalog' with an Index named 'SearchableText' of type 'TextIndexNG2'. In the 
attributes field of this index I wrote: 
SearchableText,data,id,group,author,keywords 

TextIndexNG2 works fine if I index objects of type 'File' (e.g. PDF documents) into my 
ZCatalog 'DZCatalog' using the "Find and Catalog" Tab of the ZCatalog. But when I try to index 'ExtFile' objects (for a quick test I was using the "Find and Catalog" Tab of the ZCatalog) I am prompted with a "Save as" Window to save the found ExtFile to my local hard drive. 

Here is a short Code snippet of my current application:

####################
class DZ_Document( File, CatalogAware ):
    """
    Derive DZ_Document class from File class to provide some more attributes
    for storing information like group, etc.
    """
    
    def __init__(self, id, title, file, group):
        " class constructor "
        File.__init__(self, id, title, file)
        self.group = group  
        # automatically set attributes
        self.filesize = self.printSize()
        self.filetype = self.content_type    
    ...


def manage_addDZ_Document(self, file, id, group, title='', REQUEST=None):
    " add DZ_Document Object to Zope "

    content_type = ''   
    newObj = DZ_Document(id, title, file, group )         
    
    Documents_Folder = self._getOb('Documents') 
    Documents_Folder._setObject(id, newObj)     
    _realObj = Documents_Folder._getOb(id)
    _realObj.manage_upload(file) # manage_upload is defined in class 'File'

    _realObj.default_catalog = "DZCatalog"                                                      
    _realObj.index_object()                     


    if REQUEST is not None:
        REQUEST['RESPONSE'].redirect('manage_main')  

####################

My goal is, to rewrite the application so I can create and index 'ExtFile' objects instead of 'File' objects in Zope. My applications works very well if I index objects of type "File", but how do I avoid this "Save as" Window when Zope tries to index an ExtFile objects in the ZCatalog?


Thank you in advance, 
Nico 

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