本文整理汇总了Python中google.appengine.ext.db.StringProperty方法的典型用法代码示例。如果您正苦于以下问题:Python db.StringProperty方法的具体用法?Python db.StringProperty怎么用?Python db.StringProperty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.StringProperty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: add_prefix_properties
# 需要导入模块: from google.appengine.ext import db [as 别名]
# 或者: from google.appengine.ext.db import StringProperty [as 别名]
def add_prefix_properties(model_class, *properties):
"""Adds indexable properties to a model class to support prefix queries.
All properties ending in '_' are extra properties. The 'properties'
arguments should be names of existing string properties on the class."""
for property in properties:
# This property contains a copy of the entire string normalized.
setattr(model_class, property + '_n_', db.StringProperty())
# This property contains just the first character, normalized.
setattr(model_class, property + '_n1_', db.StringProperty())
# This property contains just the first two characters, normalized.
setattr(model_class, property + '_n2_', db.StringProperty())
# Record the prefix properties.
if not hasattr(model_class, '_prefix_properties'):
model_class._prefix_properties = []
model_class._prefix_properties += list(properties)
# Update the model class.
db._initialize_properties(
model_class, model_class.__name__, model_class.__bases__,
model_class.__dict__)
示例2: get_TextField
# 需要导入模块: from google.appengine.ext import db [as 别名]
# 或者: from google.appengine.ext.db import StringProperty [as 别名]
def get_TextField(kwargs):
"""
Returns a ``TextField``, applying the ``db.StringProperty`` length limit
of 500 bytes.
"""
kwargs['validators'].append(validators.length(max=500))
return f.TextField(**kwargs)
示例3: convert_StringProperty
# 需要导入模块: from google.appengine.ext import db [as 别名]
# 或者: from google.appengine.ext.db import StringProperty [as 别名]
def convert_StringProperty(model, prop, kwargs):
"""Returns a form field for a ``db.StringProperty``."""
if prop.multiline:
kwargs['validators'].append(validators.length(max=500))
return f.TextAreaField(**kwargs)
else:
return get_TextField(kwargs)
示例4: get_form_field
# 需要导入模块: from google.appengine.ext import db [as 别名]
# 或者: from google.appengine.ext.db import StringProperty [as 别名]
def get_form_field(self, **kwargs):
"""Return a Django form field appropriate for a string property.
This sets the widget default to forms.Textarea if the property's
multiline attribute is set.
"""
defaults = {}
if self.multiline:
defaults['widget'] = forms.Textarea
defaults.update(kwargs)
return super(StringProperty, self).get_form_field(**defaults)
示例5: save
# 需要导入模块: from google.appengine.ext import db [as 别名]
# 或者: from google.appengine.ext.db import StringProperty [as 别名]
def save(self, commit=True):
"""Save this form's cleaned data into a model instance.
Args:
commit: optional bool, default True; if true, the model instance
is also saved to the datastore.
Returns:
A model instance. If a model instance was already associated
with this form instance (either passed to the constructor with
instance=... or by a previous save() call), that same instance
is updated and returned; if no instance was associated yet, one
is created by this call.
Raises:
ValueError if the data couldn't be validated.
"""
if not self.is_bound:
raise ValueError('Cannot save an unbound form')
opts = self._meta
instance = self.instance
if instance is None:
fail_message = 'created'
else:
fail_message = 'updated'
if self.errors:
raise ValueError("The %s could not be %s because the data didn't "
'validate.' % (opts.model.kind(), fail_message))
cleaned_data = self._cleaned_data()
converted_data = {}
propiter = itertools.chain(
opts.model.properties().iteritems(),
iter([('key_name', StringProperty(name='key_name'))])
)
for name, prop in propiter:
value = cleaned_data.get(name)
if value is not None:
converted_data[name] = prop.make_value_from_form(value)
try:
if instance is None:
instance = opts.model(**converted_data)
self.instance = instance
else:
for name, value in converted_data.iteritems():
if name == 'key_name':
continue
setattr(instance, name, value)
except db.BadValueError, err:
raise ValueError('The %s could not be %s (%s)' %
(opts.model.kind(), fail_message, err))