set self.rset else we're missing some stuff since TheMainTemplate instance as None as rset
"""Common subpackage of cubicweb : defines library functions used both on the
hg stserver side and on the client side
:organization: Logilab
:copyright: 2001-2008 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
:contact: http://www.logilab.fr/ -- mailto:contact@logilab.fr
"""
from logilab.common.adbh import FunctionDescr
from cubicweb._exceptions import * # bw compat
from rql.utils import register_function, iter_funcnode_variables
class COMMA_JOIN(FunctionDescr):
supported_backends = ('postgres', 'sqlite',)
rtype = 'String'
@classmethod
def st_description(cls, funcnode):
return ', '.join(term.get_description()
for term in iter_funcnode_variables(funcnode))
register_function(COMMA_JOIN) # XXX do not expose?
class CONCAT_STRINGS(COMMA_JOIN):
aggregat = True
register_function(CONCAT_STRINGS) # XXX bw compat
class GROUP_CONCAT(CONCAT_STRINGS):
supported_backends = ('mysql', 'postgres', 'sqlite',)
register_function(GROUP_CONCAT)
class LIMIT_SIZE(FunctionDescr):
supported_backends = ('postgres', 'sqlite',)
rtype = 'String'
@classmethod
def st_description(cls, funcnode):
return funcnode.children[0].get_description()
register_function(LIMIT_SIZE)
class TEXT_LIMIT_SIZE(LIMIT_SIZE):
supported_backends = ('mysql', 'postgres', 'sqlite',)
register_function(TEXT_LIMIT_SIZE)