Changeset - 5e5496d63785
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Mads Kiilerich - 9 years ago 2016-10-24 15:18:51
madski@unity3d.com
lib: drop unused caching_query RelationshipCache
1 file changed with 1 insertions and 62 deletions:
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kallithea/lib/caching_query.py
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@@ -9,8 +9,6 @@ The three new concepts introduced here a
 
   retrieves results in/from Beaker.
 
 * FromCache - a query option that establishes caching
 
   parameters on a Query
 
 * RelationshipCache - a variant of FromCache which is specific
 
   to a query invoked during a lazy load.
 
 * _params_from_query - extracts value parameters from
 
   a Query.
 

	
 
@@ -54,7 +52,7 @@ class CachingQuery(Query):
 
    by this query, which are usually literals defined in the
 
    WHERE clause.
 

	
 
    The FromCache and RelationshipCache mapper options below represent
 
    The FromCache mapper option below represent
 
    the "public" method of configuring this state upon the CachingQuery.
 

	
 
    """
 
@@ -212,65 +210,6 @@ class FromCache(MapperOption):
 
                              self.cache_key)
 

	
 

	
 
class RelationshipCache(MapperOption):
 
    """Specifies that a Query as called within a "lazy load"
 
       should load results from a cache."""
 

	
 
    propagate_to_loaders = True
 

	
 
    def __init__(self, region, namespace, attribute):
 
        """Construct a new RelationshipCache.
 

	
 
        :param region: the cache region.  Should be a
 
        region configured in the Beaker CacheManager.
 

	
 
        :param namespace: the cache namespace.  Should
 
        be a name uniquely describing the target Query's
 
        lexical structure.
 

	
 
        :param attribute: A Class.attribute which
 
        indicates a particular class relationship() whose
 
        lazy loader should be pulled from the cache.
 

	
 
        """
 
        self.region = region
 
        self.namespace = namespace
 
        self._relationship_options = {
 
            (attribute.property.parent.class_, attribute.property.key): self
 
        }
 

	
 
    def process_query_conditionally(self, query):
 
        """Process a Query that is used within a lazy loader.
 

	
 
        (the process_query_conditionally() method is a SQLAlchemy
 
        hook invoked only within lazyload.)
 

	
 
        """
 
        if query._current_path:
 
            mapper, key = query._current_path[-2:]
 

	
 
            for cls in mapper.class_.__mro__:
 
                if (cls, key) in self._relationship_options:
 
                    relationship_option = \
 
                        self._relationship_options[(cls, key)]
 
                    _set_cache_parameters(
 
                            query,
 
                            relationship_option.region,
 
                            relationship_option.namespace,
 
                            None)
 

	
 
    def and_(self, option):
 
        """Chain another RelationshipCache option to this one.
 

	
 
        While many RelationshipCache objects can be specified on a single
 
        Query separately, chaining them together allows for a more efficient
 
        lookup during load.
 

	
 
        """
 
        self._relationship_options.update(option._relationship_options)
 
        return self
 

	
 

	
 
def _params_from_query(query):
 
    """Pull the bind parameter values from a query.
 

	
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