On 2006-05-04, Jonathan <[EMAIL PROTECTED]> wrote: > >> >>>From the Berkeley DB docs: >> >> Usually you find database records by means of the record's key. >> However, the key that you use for your record will not always contain >> the information required to provide you with rapid access to the data >> that you want to retrieve. For example, suppose your database contains >> records related to users. The key might be a string that is some unique >> identifier for the person, such as a user ID. Each record's data, >> however, would likely contain a complex object containing details about >> people such as names, addresses, phone numbers, and so forth. While >> your application may frequently want to query a person by user ID (that >> is, by the information stored in the key), it may also on occasion want >> to location people by, say, their name. >> >> Rather than iterate through all of the records in your database, >> examining each in turn for a given person's name, you create indexes >> based on names and then just search that index for the name that you >> want. You can do this using secondary databases. In DB, the database >> that contains your data is called a primary database. A database that >> provides an alternative set of keys to access that data is called a >> secondary database. In a secondary database, the keys are your >> alternative (or secondary) index, and the data corresponds to a primary >> record's key. >> > > This usage scenario can easily be implemented using ZCatalog (as Chris > mentioned) - check the ZopeBook for info.
Last year I hacked some ZCatalog replacement because I had a non-zope standalone ZODB application. It is only one single file containing a complete customizable indexer. Perhaps it is also useable here. http://files.banality.de/public/standaloneindexer.py Simon Pamies _______________________________________________ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )