(CCing google-appengine).
Here's another usecase for custom message field:
from google.appengine.datastore.datastore_query import Cursor
class CursorMessage(messages.Message):
encoded = messages.StringField(1)
class CursorField(messages.MessageField):
message_type = CursorMessage
def value_from_message(self, message):
"""Converts CursorMessage to a datastore_query.Cursor."""
return Cursor(urlsafe=message.encoded)
def message_from_value(self, value):
"""Converts datastore_query.Cursor to a CursorMessage."""
return CursorMessage(encoded=value.urlsafe())
What do you guys think, makes sense?
Thanks,
Alex.
On Tuesday, 16 July 2013 19:04:24 UTC+2, Danny Hermes wrote:
>
> Why do you need this for Cloud Endpoints? Can you post this on Stack
> Overflow?
>
>
> On Tue, Jul 16, 2013 at 3:38 AM, tevin joseph
> <tevinj...@gmail.com<javascript:>
> > wrote:
>
>> Hi,
>>
>> I would like to create a user defined MessageField like DateTimeField. I
>> have created one as follows:
>>
>> class ErrorMessage(Message):
>> code = StringField(1, required=True)
>> message = StringField(2, required=True)
>> reference = StringField(3, required=True)
>>
>> class ErrorField(MessageField):
>> message_type = ErrorMessage
>>
>> @util.positional(3)
>> def __init__(self, number, **kwargs):
>> super(ErrorField, self).__init__(self.message_type, number,
>> **kwargs)
>>
>> Is it sound right? I have used this ErrorField as one of the field in
>> response class of Google cloud endpoints. It works well with JS client but
>> when used with android, error object gets in the format error="".
>> Thanks in advance.
>>
>> return MyResponse(
>> isSaved=False,
>> error=ErrorMessage(code="200",
>> message=simplejson.dumps(form.errors),
>> reference="form validation error")
>> )
>>
>> from protorpc.messages import Message, StringField, MessageField
>>
>> class MyResponse(Message):
>> isSaved = StringField(1, required=True)
>> error = ErrorField(2, required = False)
>>
>>
>> --
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>>
>>
>
>
>
> --
> Danny Hermes
> Developer Programs Engineer
>
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