本文整理汇总了Python中google.appengine.ext.ndb.ComputedProperty方法的典型用法代码示例。如果您正苦于以下问题:Python ndb.ComputedProperty方法的具体用法?Python ndb.ComputedProperty怎么用?Python ndb.ComputedProperty使用的例子?那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类google.appengine.ext.ndb
的用法示例。
在下文中一共展示了ndb.ComputedProperty方法的10个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: need_update_from_run_result
# 需要导入模块: from google.appengine.ext import ndb [as 别名]
# 或者: from google.appengine.ext.ndb import ComputedProperty [as 别名]
def need_update_from_run_result(self, run_result):
"""Returns True if set_from_run_result() would modify this instance.
E.g. they are different and TaskResultSummary needs to be updated from the
corresponding TaskRunResult.
"""
assert isinstance(run_result, TaskRunResult), run_result
# A previous try is still sending update. Ignore it from a result summary
# PoV.
if self.try_number and self.try_number > run_result.try_number:
return False
for property_name in _TaskResultCommon._properties_fixed():
if getattr(self, property_name) != getattr(run_result, property_name):
return True
# Include explicit support for 'state' and 'try_number'. TaskRunResult.state
# is a ComputedProperty so it can't be copied as-is, and try_number is a
# generated property.
# pylint: disable=W0201
return (
self.state != run_result.state or
self.try_number != run_result.try_number)
示例2: testHasValue
# 需要导入模块: from google.appengine.ext import ndb [as 别名]
# 或者: from google.appengine.ext.ndb import ComputedProperty [as 别名]
def testHasValue(self):
class Foo(ndb.Model):
a = ndb.ComputedProperty(lambda self: 'a')
b = ndb.StringProperty()
foo = Foo()
self.assertFalse(datastore_utils.HasValue(foo, 'a'))
self.assertFalse(datastore_utils.HasValue(foo, 'b'))
foo.b = 'b'
self.assertFalse(datastore_utils.HasValue(foo, 'a'))
self.assertTrue(datastore_utils.HasValue(foo, 'b'))
foo.put()
self.assertTrue(datastore_utils.HasValue(foo, 'a'))
self.assertTrue(datastore_utils.HasValue(foo, 'b'))
示例3: GetLocalComputedPropertyValue
# 需要导入模块: from google.appengine.ext import ndb [as 别名]
# 或者: from google.appengine.ext.ndb import ComputedProperty [as 别名]
def GetLocalComputedPropertyValue(entity, computed_property_name):
"""Return the local value of a ComputedProperty instead of re-computing.
Args:
entity: ndb.Model, The entity from which the ComputedProperty will be read.
computed_property_name: str, The name of the ComputedProperty whose value
will be read.
Returns:
The local value of the property.
Raises:
PropertyError: The property was not found or was not a ComputedProperty.
"""
computed_property = entity._properties.get(computed_property_name, None) # pylint: disable=protected-access
if not computed_property:
raise PropertyError('Property %s not found' % computed_property_name)
elif not isinstance(computed_property, ndb.ComputedProperty):
raise PropertyError(
'Property %s is of type %s. Expected ComputedProperty.' % (
computed_property_name, type(entity).__name__))
return super( # pylint: disable=protected-access
ndb.ComputedProperty, computed_property)._get_value(entity)
示例4: convert_ComputedProperty
# 需要导入模块: from google.appengine.ext import ndb [as 别名]
# 或者: from google.appengine.ext.ndb import ComputedProperty [as 别名]
def convert_ComputedProperty(self, model, prop, kwargs):
"""Returns a form field for a ``ndb.ComputedProperty``."""
return None
示例5: _properties_fixed
# 需要导入模块: from google.appengine.ext import ndb [as 别名]
# 或者: from google.appengine.ext.ndb import ComputedProperty [as 别名]
def _properties_fixed(cls):
"""Returns all properties with their member name, excluding computed
properties.
"""
return [
prop._code_name for prop in cls._properties.values()
if not isinstance(prop, ndb.ComputedProperty)
]
示例6: set_from_run_result
# 需要导入模块: from google.appengine.ext import ndb [as 别名]
# 或者: from google.appengine.ext.ndb import ComputedProperty [as 别名]
def set_from_run_result(self, run_result, request):
"""Copies all the relevant properties from a TaskRunResult into this
TaskResultSummary.
If the task completed, succeeded and is idempotent, self.properties_hash is
set.
"""
assert ndb.in_transaction()
assert isinstance(request, task_request.TaskRequest), request
assert isinstance(run_result, TaskRunResult), run_result
for property_name in _TaskResultCommon._properties_fixed():
setattr(self, property_name, getattr(run_result, property_name))
# Include explicit support for 'state' and 'try_number'. TaskRunResult.state
# is a ComputedProperty so it can't be copied as-is, and try_number is a
# generated property.
# pylint: disable=W0201
self.state = run_result.state
self.try_number = run_result.try_number
while len(self.costs_usd) < run_result.try_number:
self.costs_usd.append(0.)
self.costs_usd[run_result.try_number-1] = run_result.cost_usd
# Update the automatic tags, removing the ones from the other
# TaskProperties.
t = request.task_slice(run_result.current_task_slice or 0)
if run_result.current_task_slice != self.current_task_slice:
self.tags = task_request.get_automatic_tags(
request, run_result.current_task_slice)
if (self.state == State.COMPLETED and
not self.failure and
not self.internal_failure and
t.properties.idempotent and
not self.deduped_from):
# Signal the results are valid and can be reused. If the request has a
# SecretBytes, it is GET, which is a performance concern.
self.properties_hash = t.properties_hash(request)
示例7: _validate_filters_ndb
# 需要导入模块: from google.appengine.ext import ndb [as 别名]
# 或者: from google.appengine.ext.ndb import ComputedProperty [as 别名]
def _validate_filters_ndb(cls, filters, model_class):
"""Validate ndb.Model filters."""
if not filters:
return
properties = model_class._properties
for idx, f in enumerate(filters):
prop, ineq, val = f
if prop not in properties:
raise errors.BadReaderParamsError(
"Property %s is not defined for entity type %s",
prop, model_class._get_kind())
# Attempt to cast the value to a KeyProperty if appropriate.
# This enables filtering against keys.
try:
if (isinstance(val, basestring) and
isinstance(properties[prop],
(ndb.KeyProperty, ndb.ComputedProperty))):
val = ndb.Key(urlsafe=val)
filters[idx] = [prop, ineq, val]
except:
pass
# Validate the value of each filter. We need to know filters have
# valid value to carry out splits.
try:
properties[prop]._do_validate(val)
except db.BadValueError, e:
raise errors.BadReaderParamsError(e)
示例8: testFailToSet_ComputedProperty
# 需要导入模块: from google.appengine.ext import ndb [as 别名]
# 或者: from google.appengine.ext.ndb import ComputedProperty [as 别名]
def testFailToSet_ComputedProperty(self):
class A(ndb.Model):
a = ndb.StringProperty()
b = ndb.ComputedProperty(lambda self: self.a[0])
inst = A(a='xyz')
inst.put()
self.assertEqual('x', inst.b)
with self.assertRaises(datastore_utils.PropertyError):
datastore_utils.CopyEntity(inst, b='a')
示例9: testModelWithComputedProperty
# 需要导入模块: from google.appengine.ext import ndb [as 别名]
# 或者: from google.appengine.ext.ndb import ComputedProperty [as 别名]
def testModelWithComputedProperty(self):
class A(ndb.Model):
a = ndb.StringProperty()
b = ndb.ComputedProperty(lambda self: self.a[0])
inst = A(a='xyz')
inst.put()
self.assertEqual('x', inst.b)
new = datastore_utils.CopyEntity(inst, a='abc')
new.put()
self.assertEqual('a', new.b)
示例10: setUp
# 需要导入模块: from google.appengine.ext import ndb [as 别名]
# 或者: from google.appengine.ext.ndb import ComputedProperty [as 别名]
def setUp(self):
super(GetLocalComputedPropertyValueTest, self).setUp()
class A(ndb.Model):
a = ndb.StringProperty()
b = ndb.ComputedProperty(lambda self: self.a[0])
self.inst = A(a='xyz')