def get_value(self):
obj = self.field.proxied_args['ObjectArg']
val = utils.resolve_dotted_attribute(obj, self.field.model_field_name)
# Prevent throwing a MethodException if the value is None
if val is None:
return None
return self.get_method(val)(*self.args, **self.kwargs)
def get_value(self):
obj = self.field.proxied_args['ObjectArg']
val = utils.resolve_dotted_attribute(obj, self.field.model_field_name)
# Prevent throwing a MethodException if the value is None
if val is None:
return None
return self.get_method(val)(*self.args, **self.kwargs)
def get_method(self, obj=None):
""" Resolves the given method into a callable object.
If 'obj' is provided, the method will be looked for as an
attribute of the 'obj'
Supports dotted names.
Usage:
>>> method = Method('obj.obj.method', RequestArg)
>>> method()
'Result of method called with: obj.obj.method(request)'
>>>
Dotted attributes are most useful when using something like an
an ObjectMethod:
(where 'user' is an instance of Django's 'User' model,
the Object in this example is the 'user' instance)
>>> method = ObjectMethod('date_joined.strftime', '%Y-%m-%d %H:%M:%S')
>>> method()
2009-10-02 09:58:39
>>>
The actual method call looks like:
>>> user.date_joined.strftime('%Y-%m-%d %H:%M:%S')
2009-10-02 09:58:39
>>>
It also supports attributes which are not actually methods:
>>> method = ObjectMethod('first_name', 'ignored arguments', ...) # Arguments to a non-callable are ignored.
>>> method()
u'Bilbo'
>>> method = ValueMethod('first_name', 'upper') # Called on the returned value
>>> method()
u'BILBO'
>>>
The method call for the last one looks like:
>>> user.first_name.upper()
u'BILBO'
>>>
"""
if callable(self.method_or_methodname):
return self.method_or_methodname
if not isinstance(self.method_or_methodname, (str, unicode)):
raise MethodException('Method must a string or callable')
if obj is not None:
try:
method = utils.resolve_dotted_attribute(
obj, self.method_or_methodname)
except AttributeError:
raise MethodException(
'Cannot resolve method "%s" in object "%s"' %
(self.method_or_methodname, type(obj)))
if not callable(method):
# Turn this into a callable
m = method
def _m(*args, **kwargs):
return m
method = _m
return method
try:
return eval(self.method_or_methodname
) # Just try to get it in current scope
except NameError:
raise MethodException('Cannot resolve method "%s"' %
self.method_or_methodname)
def get_method(self, obj=None):
""" Resolves the given method into a callable object.
If 'obj' is provided, the method will be looked for as an
attribute of the 'obj'
Supports dotted names.
Usage:
>>> method = Method('obj.obj.method', RequestArg)
>>> method()
'Result of method called with: obj.obj.method(request)'
>>>
Dotted attributes are most useful when using something like an
an ObjectMethod:
(where 'user' is an instance of Django's 'User' model,
the Object in this example is the 'user' instance)
>>> method = ObjectMethod('date_joined.strftime', '%Y-%m-%d %H:%M:%S')
>>> method()
2009-10-02 09:58:39
>>>
The actual method call looks like:
>>> user.date_joined.strftime('%Y-%m-%d %H:%M:%S')
2009-10-02 09:58:39
>>>
It also supports attributes which are not actually methods:
>>> method = ObjectMethod('first_name', 'ignored arguments', ...) # Arguments to a non-callable are ignored.
>>> method()
u'Bilbo'
>>> method = ValueMethod('first_name', 'upper') # Called on the returned value
>>> method()
u'BILBO'
>>>
The method call for the last one looks like:
>>> user.first_name.upper()
u'BILBO'
>>>
"""
if callable(self.method_or_methodname):
return self.method_or_methodname
if not isinstance(self.method_or_methodname, (str, unicode)):
raise MethodException("Method must a string or callable")
if obj is not None:
try:
method = utils.resolve_dotted_attribute(obj, self.method_or_methodname)
except AttributeError:
raise MethodException(
'Cannot resolve method "%s" in object "%s"' % (self.method_or_methodname, type(obj))
)
if not callable(method):
# Turn this into a callable
m = method
def _m(*args, **kwargs):
return m
method = _m
return method
try:
return eval(self.method_or_methodname) # Just try to get it in current scope
except NameError:
raise MethodException('Cannot resolve method "%s"' % self.method_or_methodname)