def testOneCondition(self):
self.assertQuery(AND(A.type == u'Narf!'),
'((%s = ?))' % (A.type.getColumnName(self.store), ),
['Narf!'])
self.assertQuery(OR(A.type == u'Narf!'),
'((%s = ?))' % (A.type.getColumnName(self.store), ),
['Narf!'])
self.assertEquals(self.query(D, AND(D.one == 'd1.one')), [self.d1])
self.assertEquals(self.query(D, OR(D.one == 'd1.one')), [self.d1])
def testMultipleOrConditions(self):
condition = OR(A.type == u'Narf!', A.type == u'Poiuyt!',
A.type == u'Try to take over the world')
expectedSQL = '((%s = ?) OR (%s = ?) OR (%s = ?))'
expectedSQL %= (A.type.getColumnName(self.store), ) * 3
self.assertQuery(condition, expectedSQL,
['Narf!', 'Poiuyt!', 'Try to take over the world'])
q = self.query(
D, OR(D.one == 'd1.one', D.one == 'd2.one', D.one == 'd3.one'))
e = [self.d1, self.d2, self.d3]
self.assertEquals(sorted(q), sorted(e))
def main(s):
for ll in s.query(LendingLibrary):
print 'found existing library'
break
else:
print 'creating new library'
ll = LendingLibrary(store=s)
ll.initialize()
ll.displayBooks()
print '***'
ll.shuffleLending()
print '---'
ll.displayBooks()
print '***'
ll.shuffleLending()
print '---'
print s.count(
Book,
AND(Book.author == u'Stephen King',
Book.title == u'The Lions of al-Rassan'))
print s.count(
Book,
OR(Book.author == u'Stephen King',
Book.title == u'The Lions of al-Rassan'))
def __ne__(self, other):
if not isinstance(other, (AttributeTuple, tuple, list)):
return NotImplemented
return OR(*[
myAttr != otherAttr
for (myAttr, otherAttr)
in zip(self, other)])
def getLoginMethods(store, protocol=None):
"""
Retrieve L{LoginMethod} items from store C{store}, optionally constraining
them by protocol
"""
if protocol is not None:
comp = OR(LoginMethod.protocol == u'*',
LoginMethod.protocol == protocol)
else:
comp = None
return store.query(LoginMethod, comp)
def overlapping(
startAttribute, # X
endAttribute, # Y
startValue, # A
endValue, # B
):
"""
Return an L{axiom.iaxiom.IComparison} (an object that can be passed as the
'comparison' argument to Store.query/.sum/.count) which will constrain a
query against 2 attributes for ranges which overlap with the given
arguments.
For a database with Items of class O which represent values in this
configuration::
X Y
(a) (b)
|-------------------|
(c) (d)
|--------| (e) (f)
|--------|
(g) (h)
|---| (i) (j)
|------|
(k) (l)
|-------------------------------------|
(a) (l)
|-----------------------------|
(c) (b)
|------------------------|
(c) (a)
|----|
(b) (l)
|---------|
The query::
myStore.query(
O,
findOverlapping(O.X, O.Y,
a, b))
Will return a generator of Items of class O which represent segments a-b,
c-d, e-f, k-l, a-l, c-b, c-a and b-l, but NOT segments g-h or i-j.
(NOTE: If you want to pass attributes of different classes for
startAttribute and endAttribute, read the implementation of this method to
discover the additional join clauses required. This may be eliminated some
day so for now, consider this method undefined over multiple classes.)
In the database where this query is run, for an item N, all values of
N.startAttribute must be less than N.endAttribute.
startValue must be less than endValue.
"""
assert startValue <= endValue
return OR(AND(startAttribute >= startValue, startAttribute <= endValue),
AND(endAttribute >= startValue, endAttribute <= endValue),
AND(startAttribute <= startValue, endAttribute >= endValue))
def __le__(self, other):
if not isinstance(other, (AttributeTuple, tuple, list)):
return NotImplemented
return OR(self < other, self == other)
def testORConditionCount(self):
self.assertCountEqualsQuery(
ThingsWithIntegers,
OR(ThingsWithIntegers.a > self.MIDDLE,
ThingsWithIntegers.b < self.MIDDLE))
