def __init__(self, owner, rClass, tablename, lKey, rKey):
self.__super.__init__(self)
self.owner = owner
self.rClass = rClass
self.table = Table(self.owner._table.dbc, tablename)
self.lKey = lKey
self.rKey = rKey
def __init__(self, owner, rClass, tablename, lKey, rKey):
self.__super.__init__(self)
self.owner = owner
self.rClass = rClass
self.table = Table(self.owner._table.dbc, tablename)
self.lKey=lKey
self.rKey=rKey
class Junction(IdxDict):
__super = IdxDict
"""
This does the grunt work for working with
foreign keys in a *:* relationship.
@TODO: clarify this documentation.. it even confuses me.
lKey is local (or left hand) key fieldname (ON THE FOREIGN TABLE!)
rKey is remote (or right-hand) key fieldname
lID is the actual value for the local key
"""
def __init__(self, owner, rClass, tablename, lKey, rKey):
self.__super.__init__(self)
self.owner = owner
self.rClass = rClass
self.table = Table(self.owner._table.dbc, tablename)
self.lKey=lKey
self.rKey=rKey
def clear(self):
self.__super.clear(self)
# if owner is saved, it may already be linked in db..
if self.owner.ID:
self.delete()
def delete(self):
"""
Delete the records in the junction, breaking the *:* join.
"""
for row in self._getRows():
row.delete()
def fetch(self):
"""
load the junction data..
"""
for row in self._getRows():
obj = self.rClass(self.owner._ds, ID=row[self.rKey])
self << obj
def save(self):
"""
Save the records in the junction.
"""
self.delete()
for robj in self:
row = self.table.new()
row[self.lKey] = int(self.owner.ID)
row[self.rKey] = robj.ID
row.save()
def IDs(self):
#@TODO: do I really need .IDs? (maybe for the edit product form?)
return tuple(map( lambda robj: robj.ID, self))
def _getRows(self):
if self.owner.ID:
res = self.table.select("%s=%s" % (self.lKey, int(self.owner.ID)))
#@TODO: #orderBy=self.rKey)
else:
res = []
return res
class Junction(IdxDict):
__super = IdxDict
"""
This does the grunt work for working with
foreign keys in a *:* relationship.
@TODO: clarify this documentation.. it even confuses me.
lKey is local (or left hand) key fieldname (ON THE FOREIGN TABLE!)
rKey is remote (or right-hand) key fieldname
lID is the actual value for the local key
"""
def __init__(self, owner, rClass, tablename, lKey, rKey):
self.__super.__init__(self)
self.owner = owner
self.rClass = rClass
self.table = Table(self.owner._table.dbc, tablename)
self.lKey = lKey
self.rKey = rKey
def clear(self):
self.__super.clear(self)
# if owner is saved, it may already be linked in db..
if self.owner.ID:
self.delete()
def delete(self):
"""
Delete the records in the junction, breaking the *:* join.
"""
for row in self._getRows():
row.delete()
def fetch(self):
"""
load the junction data..
"""
for row in self._getRows():
obj = self.rClass(self.owner._ds, ID=row[self.rKey])
self << obj
def save(self):
"""
Save the records in the junction.
"""
self.delete()
for robj in self:
row = self.table.new()
row[self.lKey] = int(self.owner.ID)
row[self.rKey] = robj.ID
row.save()
def IDs(self):
#@TODO: do I really need .IDs? (maybe for the edit product form?)
return tuple(map(lambda robj: robj.ID, self))
def _getRows(self):
if self.owner.ID:
res = self.table.select("%s=%s" % (self.lKey, int(self.owner.ID)))
#@TODO: #orderBy=self.rKey)
else:
res = []
return res
