Advanced development with eZ Find - part 3 : Leveraging the Solr syntax
Monday 05 July 2010 2:53:02 am
Step 2 : How to work with keywords
Unlike the previous example of dates, keywords in eZ Publish are stored in an external table ezkeyword_attribute_link ( additional storage location, on top of the standard content storage location, for an extended logic ), allowing to link a given keyword to various pieces of content, of various content classes. However, the per-keyword fetch is not as equipped as a standard content/list fetch for instance, in terms of available filters (class_filter_type, class_filter_array, extended_attribute_filter, etc.). This limitation is understandable since allowing for a cross-content-class filter reduces freedom when it comes to filtering on class-specific attributes.
Following the same idea as for the per-date sorting, it is possible to leverage eZ Find to realize all necessary operations around keywords. Here are examples :
'filter', array('attr_tags_lk:"ez publish"', 'NOT attr_title_t:"RSS"')
Result :
Only returns the results associated with the "eZ Publish" or "ez publish" keywords (mind the usage of _lk, meaning lowercase ), and the title of which do not contain "RSS".
'filter', array('attr_tags_lk:"ez publish"', 'attr_tags_lk:"mootools"')
Result :
Only returns the results associated with both the "eZ Publish" and "ez publish" keywords, and the "Mootools" and "mootools" keywords.