Python google.appengine.ext.db 模块，BlobProperty() 实例源码

def convert_BlobProperty(model, prop, kwargs):
    """Returns a form field for a ``db.BlobProperty``."""
    return f.FileField(**kwargs)

def convert_BlobProperty(model, prop, kwargs):
    """Returns a form field for a ``db.BlobProperty``."""
    return f.FileField(**kwargs)

def convert_BlobProperty(model, prop, kwargs):
    """Returns a form field for a ``db.BlobProperty``."""
    return f.FileField(**kwargs)

def convert_BlobProperty(model, prop, kwargs):
    """Returns a form field for a ``db.BlobProperty``."""
    return f.FileField(**kwargs)

def __init__(self,db,uri,pool_size=0,folder=None,db_codec ='UTF-8',
                 credential_decoder=IDENTITY, driver_args={},
                 adapter_args={}, do_connect=True, after_connection=None):
        self.types.update({
                'boolean': gae.BooleanProperty,
                'string': (lambda **kwargs: gae.StringProperty(multiline=True, **kwargs)),
                'text': gae.TextProperty,
                'json': gae.TextProperty,
                'password': gae.StringProperty,
                'blob': gae.BlobProperty,
                'upload': gae.StringProperty,
                'integer': gae.IntegerProperty,
                'bigint': gae.IntegerProperty,
                'float': gae.FloatProperty,
                'double': gae.FloatProperty,
                'decimal': GAEDecimalProperty,
                'date': gae.DateProperty,
                'time': gae.TimeProperty,
                'datetime': gae.DateTimeProperty,
                'id': None,
                'reference': gae.IntegerProperty,
                'list:string': (lambda **kwargs: gae.StringListProperty(default=None, **kwargs)),
                'list:integer': (lambda **kwargs: gae.ListProperty(int,default=None, **kwargs)),
                'list:reference': (lambda **kwargs: gae.ListProperty(int,default=None, **kwargs)),
                })
        self.db = db
        self.uri = uri
        self.dbengine = 'google:datastore'
        self.folder = folder
        db['_lastsql'] = ''
        self.db_codec = 'UTF-8'
        self._after_connection = after_connection
        self.pool_size = 0
        match = self.REGEX_NAMESPACE.match(uri)
        if match:
            namespace_manager.set_namespace(match.group('namespace'))

def convert_BlobProperty(model, prop, kwargs):
    """Returns a form field for a ``db.BlobProperty``."""
    return f.FileField(**kwargs)

def convert_BlobProperty(model, prop, kwargs):
    """Returns a form field for a ``db.BlobProperty``."""
    return f.FileField(**kwargs)

def convert_BlobProperty(model, prop, kwargs):
    """Returns a form field for a ``db.BlobProperty``."""
    return f.FileField(**kwargs)

def convert_BlobProperty(model, prop, kwargs):
    """Returns a form field for a ``db.BlobProperty``."""
    return f.FileField(**kwargs)

def convert_BlobProperty(model, prop, kwargs):
    """Returns a form field for a ``db.BlobProperty``."""
    return f.FileField(**kwargs)

def convert_BlobProperty(model, prop, kwargs):
    """Returns a form field for a ``db.BlobProperty``."""
    return f.FileField(**kwargs)

def convert_BlobProperty(model, prop, kwargs):
    """Returns a form field for a ``db.BlobProperty``."""
    return f.FileField(**kwargs)

def convert_BlobProperty(model, prop, kwargs):
    """Returns a form field for a ``db.BlobProperty``."""
    return f.FileField(**kwargs)

def convert_BlobProperty(model, prop, kwargs):
    """Returns a form field for a ``db.BlobProperty``."""
    return f.FileField(**kwargs)

def convert_BlobProperty(model, prop, kwargs):
    """Returns a form field for a ``db.BlobProperty``."""
    return f.FileField(**kwargs)

def convert_BlobProperty(model, prop, kwargs):
    """Returns a form field for a ``db.BlobProperty``."""
    return f.FileField(**kwargs)

def __init__(self, *args, **kwargs):
    super(BlobProperty, self).__init__(*args, **kwargs)
    self.form_value = None

def get_form_field(self, **kwargs):
    """Return a Django form field appropriate for a blob property.

    This defaults to a forms.FileField instance when using Django 0.97
    or later.  For 0.96 this returns None, as file uploads are not
    really supported in that version.
    """
    if not hasattr(forms, 'FileField'):
      return None
    defaults = {'form_class': forms.FileField}
    defaults.update(kwargs)
    return super(BlobProperty, self).get_form_field(**defaults)

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)

def convert_BlobProperty(model, prop, kwargs):
    """Returns a form field for a ``db.BlobProperty``."""
    return f.FileField(**kwargs)

def convert_BlobProperty(model, prop, kwargs):
    """Returns a form field for a ``db.BlobProperty``."""
    return f.FileField(**kwargs)

def convert_BlobProperty(model, prop, kwargs):
    """Returns a form field for a ``db.BlobProperty``."""
    return f.FileField(**kwargs)

def convert_BlobProperty(model, prop, kwargs):
    """Returns a form field for a ``db.BlobProperty``."""
    return f.FileField(**kwargs)

def convert_BlobProperty(model, prop, kwargs):
    """Returns a form field for a ``db.BlobProperty``."""
    return f.FileField(**kwargs)

def convert_BlobProperty(model, prop, kwargs):
    """Returns a form field for a ``db.BlobProperty``."""
    return f.FileField(**kwargs)