API docs for “vmc.contrib.axiom.store.AttributeQuery”

Method	__init__	Create a generic object-oriented interface to SQL, used to implement
Method	count
Method	sum	Return the sum of all the values returned by this query. If no results
Method	average	Return the average value (as defined by the AVG implementation in the
Method	max	Undocumented
Method	min	Undocumented

Inherited from BaseQuery:

Method	cloneQuery	Create a similar-but-not-identical copy of this query with certain
Method	__repr__	Undocumented
Method	explain	A debugging API, exposing SQLite's 'EXPLAIN' statement.
Method	_involvedTables	Return a list of tables involved in this query,
Method	_computeFromClause	Generate the SQL string which follows the "FROM" string and before the
Method	_sqlAndArgs	Undocumented
Method	_runQuery	Undocumented
Method	locateCallSite	Undocumented
Method	_selectStuff	Return a generator which yields the massaged results of this query with
Method	distinct	Call this method if you want to avoid repeated results from a query.
Method	__iter__	Iterate the results of this query.
Method	next	This method is deprecated, a holdover from when queries were iterators,

def __init__(self, store, tableClass, comparison=None, limit=None, offset=None, sort=None, attribute=None, raw=False):

overrides vmc.contrib.axiom.store.BaseQuery.__init__

Create a generic object-oriented interface to SQL, used to implement Store.query.

Parameters	store	the store that this query is within.
	tableClass	a subclass of `Item`.
	comparison	an implementor of `iaxiom.IComparison`
	limit	an `int` that limits the number of results that will be queried for, or None to indicate that all results should be returned.
	offset	an `int` that specifies the offset within the query results to begin iterating from, or None to indicate that we should start at 0.
	sort	A sort order object. Obtained by doing `YourItemClass.yourAttribute.ascending` or `.descending`.

def _massageData(self, row):

overrides vmc.contrib.axiom.store.BaseQuery._massageData

Convert a raw database row to the type described by an attribute. For example, convert a database integer into an extime.Time instance for an attributes.timestamp attribute.

Parameters	row	a 1-tuple, containing the in-database value from my attribute.
Returns	a value of the type described by my attribute.

def count(self):

from vmc.contrib.axiom.iaxiom.IQuery

Returns the number of non-None values of this attribute specified by this query.

def sum(self):

Return the sum of all the values returned by this query. If no results are specified, return None.

Note: for non-numeric column types the result of this method will be nonsensical.

Returns a number or None.

def average(self):

Return the average value (as defined by the AVG implementation in the database) of the values specified by this query.

Note: for non-numeric column types the result of this method will be nonsensical.

Returns a float representing the 'average' value of this column.

Class v.c.a.s.AttributeQuery(BaseQuery):