def desc(self, qrn=None, verbose=False):
"""Prints the description of the relations of the model
If a qualified relation name (<schema name>.<table name>) is
passed, prints only the description of the corresponding relation.
"""
if not qrn:
entry = self.__metadata[self.__dbname]['byname']
for key in entry:
fqrn = ".".join(['"{}"'.format(elt) for elt in key[1:]])
if verbose:
print(relation_factory(
'Table', (), {'fqrn': fqrn, 'model': self})())
else:
print('{} {}'.format(entry[key]['tablekind'], fqrn))
else:
fqrn = '"{}".{}'.format(self.__dbname, _normalize_qrn(qrn=qrn))
print(relation_factory(
'Table', (), {'fqrn': fqrn, 'model': self})())
def get_relation_class(self, qtn):
"""Retuns the class corresponding to the fqrn relation in the database.
@qtn is the <schema>.<table> name of the relation
@kwargs is a dictionary {field_name:value}
"""
schema, table = qtn.rsplit('.', 1)
fqrn = '.'.join([self.__dbname, '"{}"'.format(schema), table])
fqrn, _ = _normalize_fqrn(fqrn)
return relation_factory('Table', (), {'fqrn': fqrn, 'model': self})
