本文整理汇总了Python中google.appengine.ext.db.Blob方法的典型用法代码示例。如果您正苦于以下问题：Python db.Blob方法的具体用法？Python db.Blob怎么用？Python db.Blob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.db的用法示例。
在下文中一共展示了db.Blob方法的5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: get_value_for_datastore
# 需要导入模块: from google.appengine.ext import db [as 别名]
# 或者: from google.appengine.ext.db import Blob [as 别名]
def get_value_for_datastore(self, model_instance):
flow = super(FlowProperty,
self).get_value_for_datastore(model_instance)
return db.Blob(pickle.dumps(flow))
# For reading from datastore. 示例2: get_value_for_datastore
# 需要导入模块: from google.appengine.ext import db [as 别名]
# 或者: from google.appengine.ext.db import Blob [as 别名]
def get_value_for_datastore(self, model_instance):
flow = super(FlowProperty, self).get_value_for_datastore(
model_instance)
return db.Blob(pickle.dumps(flow))
# For reading from datastore. 示例3: get_value_for_datastore
# 需要导入模块: from google.appengine.ext import db [as 别名]
# 或者: from google.appengine.ext.db import Blob [as 别名]
def get_value_for_datastore(self, model_instance):
flow = super(FlowThreeLeggedProperty,
self).get_value_for_datastore(model_instance)
return db.Blob(pickle.dumps(flow))
# For reading from datastore. 示例4: get_value_for_form
# 需要导入模块: from google.appengine.ext import db [as 别名]
# 或者: from google.appengine.ext.db import Blob [as 别名]
def get_value_for_form(self, instance):
"""Extract the property value from the instance for use in a form.
There is no way to convert a Blob into an initial value for a file
upload, so we always return None.
"""
return None 示例5: make_value_from_form
# 需要导入模块: from google.appengine.ext import db [as 别名]
# 或者: from google.appengine.ext.db import Blob [as 别名]
def make_value_from_form(self, value):
"""Convert a form value to a property value.
This extracts the content from the UploadedFile instance returned
by the FileField instance.
"""
if have_uploadedfile and isinstance(value, uploadedfile.UploadedFile):
if not self.form_value:
self.form_value = value.read()
b = db.Blob(self.form_value)
return b
return super(BlobProperty, self).make_value_from_form(value)