def to_python(self, value):
"""
db to code; int to Version
"""
if isinstance(value, Version):
return value
if isinstance(value, str):
return Version(value)
if value is None:
return None
return Version(Version.int_to_string(value))
def what_QVersionSerializerField_used_to_do(serialized_value):
if isinstance(serialized_value, Version):
return serialized_value.fully_specified()
else:
# TODO: JUST DOUBLE-CHECKING THINGS HERE, I'M NOT ENTIRELY CLEAR ON THE ORDER THAT THINGS GET SERIALIZED...
# (it seems that it varies based on whether this is a new or existing model)
assert isinstance(serialized_value, int)
return Version.int_to_string(serialized_value)
def to_internal_value(self, data):
# given a serialized representation of a version, return a Pythonic representation
# (this should basically do the same thing as "QVersionField.to_python")
if isinstance(data, Version):
return data
if isinstance(data, basestring):
return Version(data)
if data is None:
return None
return Version(Version.int_to_string(data))
def get_prep_value(self, value):
"""
code to db; Version to int
"""
if isinstance(value, str):
return Version.string_to_int(value)
if value is None:
return None
return int(value)
def get_prep_value(self, value):
"""
code to db; Version to int
"""
if isinstance(value, basestring):
return Version.string_to_int(value)
if value is None:
return None
return int(value)
def to_python(self, value):
"""
db to code; int to Version
"""
if isinstance(value, Version):
return value
if isinstance(value, basestring):
return Version(value)
if value is None:
return None
return Version(Version.int_to_string(value))
def get_name_and_version_from_key(key):
"""
given a string representing some QOntology key,
splits it into its constituent parts: a name and a version
note that the version in the key can be underspecified
(for example, "1.10" should match "1.10.0"
:param key:
:return:
"""
match = re.match("^(.*)_(\d+\.\d+\.\d+|\d+\.\d+|\d+)$",
key) # not the most elegant regex, but you get the point
if not match:
msg = "'{0}' is an invalid key; it should be of the format 'name_version'".format(
key)
raise QError(msg)
name, underspecified_version = match.groups()
version = Version(underspecified_version).fully_specified()
return name, version