def __getattr__(self, name):
#
# This is how things like lake.geom.ST_Buffer(2) creates
# SQL expressions of this form:
#
# ST_Buffer(ST_GeomFromWKB(:ST_GeomFromWKB_1), :param_1)
#
# We create our own _FunctionGenerator here, and use it in place of
# SQLAlchemy's "func" object. This is to be able to "bind" the
# function to the SQL expression. See also GenericFunction above.
func_ = functions._FunctionGenerator(expr=self)
return getattr(func_, name)
def __getattr__(self, name):
#
# This is how things like lake.geom.ST_Buffer(2) creates
# SQL expressions of this form:
#
# ST_Buffer(ST_GeomFromWKB(:ST_GeomFromWKB_1), :param_1)
#
# We create our own _FunctionGenerator here, and use it in place of
# SQLAlchemy's "func" object. This is to be able to "bind" the
# function to the SQL expression. See also GenericFunction above.
func_ = functions._FunctionGenerator(expr=self)
return getattr(func_, name)
def __getattr__(self, name):
#
# This is how things like ocean.rast.ST_Value(...) creates
# SQL expressions of this form:
#
# ST_Value(:ST_GeomFromWKB_1), :param_1)
#
# We create our own _FunctionGenerator here, and use it in place of
# SQLAlchemy's "func" object. This is to be able to "bind" the
# function to the SQL expression. See also GenericFunction.
func_ = functions._FunctionGenerator(expr=self.function_expr)
return getattr(func_, name)
def __getattr__(self, name):
# Function names that don't start with "ST_" are rejected.
# This is not to mess up with SQLAlchemy's use of
# hasattr/getattr on Column objects.
if not name.startswith('ST_'):
raise AttributeError
# We create our own _FunctionGenerator here, and use it in place of
# SQLAlchemy's "func" object. This is to be able to "bind" the
# function to the SQL expression. See also GenericFunction above.
func_ = _FunctionGenerator(expr=self.expr)
return getattr(func_, name)
def __getattr__(self, name):
# Function names that don't start with "ST" are rejected.
# This is not to mess up with SQLAlchemy's use of
# hasattr/getattr on Column objects.
if not name.startswith('ST'):
raise AttributeError
# We create our own _FunctionGenerator here, and use it in place of
# SQLAlchemy's "func" object. This is to be able to "bind" the
# function to the SQL expression. See also GenericFunction.
func_ = _FunctionGenerator(expr=self.expr)
return getattr(func_, name)
def __getattr__(self, name):
#
# This is how things like lake.geom.ST_Buffer(2) creates
# SQL expressions of this form:
#
# ST_Buffer(ST_GeomFromWKB(:ST_GeomFromWKB_1), :param_1)
#
# Raise an AttributeError when the attribute name doesn't start
# with st_. This is to be nice with other librairies that use
# some ducktyping (e.g. hasattr(element, "copy")) to determine
# the type of the element.
if not name.lower().startswith('st_'):
raise AttributeError
# We create our own _FunctionGenerator here, and use it in place of
# SQLAlchemy's "func" object. This is to be able to "bind" the
# function to the SQL expression. See also GenericFunction above.
func_ = functions._FunctionGenerator(expr=self)
return getattr(func_, name)
