Hey, I was just guessing as to their reasoning. I happen to agree with their position.
T On Monday, September 17, 2012 7:41:06 AM UTC+8, Jeff Schnitzer wrote: > > Nonsense. Zero working code would be broken by permanently enabling > XG transactions. The only change is that code which was broken before > would no longer be broken. Which is kinda the point. > > Jeff > > On Sun, Sep 16, 2012 at 4:01 PM, timh <[email protected] <javascript:>> > wrote: > > Requiring explicit xg means preserving the current api and semantics. > Which > > I would imagine > > is the reason. xg transactions will fail if you have too many different > > entity groups in the transaction > > so, requiring some thought before turning it on is probably a good idea, > > otherwise a lot of code will > > get deployed that suddenly starts breaking on a bunch of corner cases. > > > > Just my 2c worth ;-) > > > > T > > > > > > On Monday, September 17, 2012 4:58:09 AM UTC+8, Jeff Schnitzer wrote: > >> > >> Bah. There are millions of decisions you make when building on GAE > >> which have all kinds of implications on performance and behavior. If > >> you have inexperienced devs which don't understand the implications of > >> the data model, you're going to have worse problems than transactions > >> that run slower than they otherwise would. > >> > >> Requiring XG transactions to be explicitly enabled was an API design > >> mistake. > >> > >> Jeff > >> > >> On Sat, Sep 15, 2012 at 8:46 AM, Jason Collins > >> <[email protected]> wrote: > >> > "Attempting to update multiple entity groups in a single transaction > in > >> > Datastore now throws an error suggesting to use XG transactions." > >> > > >> > This is really unfortunate. So often, I see inexperienced devs slap > an > >> > xg=True on something because of "suggestions" like this without > >> > understanding their data model or the implications. > >> > > >> > I don't think it's wise to emit a message like this. > >> > > >> > j > >> > > >> > > >> > On Friday, 14 September 2012 12:46:36 UTC-6, Bryce Cutt wrote: > >> >> > >> >> http://code.google.com/p/googleappengine/downloads/list > >> >> > >> >> A ton of bug fixes in this one. > >> >> > >> >> App Engine Python SDK - Release Notes > >> >> > >> >> Version 1.7.2 > >> >> =============================== > >> >> - Paid applications can now upload Static files and Code > 1GB. > >> >> Additional > >> >> storage will be billed at $0.13/GB per month. Free applications > will > >> >> continue to be provided 1GB of storage at no charge. Free quota > will > >> >> apply > >> >> per application. > >> >> - PyCrypto 2.6 is now a GA feature for Python 2.7 > >> >> - The Conversion API will be decommissioned soon. Developers using > this > >> >> API > >> >> will receive a warning message. Please find an alternative > document > >> >> conversion/OCR service. > >> >> - You can now fetch Task Queue Statistics. This allows you to fetch > >> >> statistics and information about your task queue from within your > >> >> application. Statistics include information such as the number of > >> >> tasks > >> >> in a queue, how many tasks were executed in the last minute and > >> >> enforced > >> >> rate. This is an experimental feature. > >> >> - Added Timezone selection widget in Admin Console Admin Logs. > >> >> - Added a warning message about caching when modifying or deleting > >> >> datastore > >> >> entities. > >> >> - Added a flush cache button to dev_appserver and Admin Console. > >> >> - Attempting to update multiple entity groups in a single > transaction > >> >> in Datastore now throws an error suggesting to use XG > transactions. > >> >> - Search API now has a string maximum length limit of 2000 > characters. > >> >> - We now allow a user with multiple google accounts the ability to > >> >> create > >> >> an > >> >> app if they are an SMS verified user. > >> >> http://code.google.com/p/googleappengine/issues/detail?id=1419 > >> >> - A more useful error message now displays when a deployment fails > >> >> due to local date/time settings being improperly set. > >> >> http://code.google.com/p/googleappengine/issues/detail?id=2033 > >> >> - Cron Descriptions may now include non-ASCII characters. > >> >> http://code.google.com/p/googleappengine/issues/detail?id=2641 > >> >> - App Config Service Delete App Version Call Count quota raised to > >> >> 10,000/day. > >> >> http://code.google.com/p/googleappengine/issues/detail?id=2808 > >> >> - Queries with transactions are now supported in Remote API. > >> >> http://code.google.com/p/googleappengine/issues/detail?id=3643 > >> >> - There are now more descriptive error messages for Datastore Admin > >> >> deadline exceeded errors in stack trace. > >> >> http://code.google.com/p/googleappengine/issues/detail?id=5413 > >> >> - Replaced error code “Administrators cannot be removed right now” > >> >> with a more descriptive message. > >> >> http://code.google.com/p/googleappengine/issues/detail?id=7080 > >> >> - Fixed an issue with namespace dropdown in Admin Console appearing > >> >> blank > >> >> even though the URL specified namespace is correct. > >> >> - Fixed an issue where Model.get_by_id() returns none in > dev_appserver > >> >> whereas this is not allowed in production. > >> >> - Fixed an issue with dev_appserver > >> >> app_identity.get_default_version_hostname() > >> >> - Fixed an issue with mail service sendToAdmins() failing when using > >> >> multi-arg message constructor. > >> >> - Fixed an issue with dev_appserver for mimetypes.guess_type() > >> >> - Fixed an issue with runtime failing to use scope with OAuth under > >> >> certain > >> >> conditions. > >> >> - Fixed an issue with AppConfigNotFound error. > >> >> http://code.google.com/p/googleappengine/issues/detail?id=686 > >> >> - Fixed an issue with static path with + in dev_appserver. > >> >> http://code.google.com/p/googleappengine/issues/detail?id=888 > >> >> - Fixed an issue with support for models with large numbers of > >> >> properties > >> >> in > >> >> Admin Console Dataviewer where previously the page would fail to > >> >> render. > >> >> http://code.google.com/p/googleappengine/issues/detail?id=937 > >> >> - Fixed an issue with multi-line string property not editing > correctly > >> >> in Dataviewer. > >> >> http://code.google.com/p/googleappengine/issues/detail?id=1725 > >> >> - Fixed an issue with URLFetch mimetools.Message parsing > incorrectly. > >> >> http://code.google.com/p/googleappengine/issues/detail?id=2011 > >> >> - Fixed an issue with the behavior of Expires header in > dev_appserver > >> >> http://code.google.com/p/googleappengine/issues/detail?id=2106 > >> >> - Fixed an issue with Content-Disposition header being removed if > >> >> filename > >> >> contains utf-8 characters. > >> >> http://code.google.com/p/googleappengine/issues/detail?id=2212 > >> >> - Fixed an issue with incoming Mail API where encoded headers failed > to > >> >> decode. > >> >> http://code.google.com/p/googleappengine/issues/detail?id=2288 > >> >> - Fixed an issue with non-ascii text displaying incorrect values > >> >> when posted by URL created by blobstore.create_upload_url() > >> >> http://code.google.com/p/googleappengine/issues/detail?id=2749 > >> >> - Fixed an issue with using sendmail in Mail API. > >> >> http://code.google.com/p/googleappengine/issues/detail?id=3106 > >> >> - Fixed an issue with appcfg.py cron_info giving the wrong timezone > >> >> information. > >> >> http://code.google.com/p/googleappengine/issues/detail?id=3307 > >> >> - Fixed an issue with Paging link in Datastore viewer not working > with > >> >> # > >> >> or & > >> >> http://code.google.com/p/googleappengine/issues/detail?id=3591 > >> >> - Fixed an issue with rounding errors in crop image transform on > >> >> dev_appserver. > >> >> http://code.google.com/p/googleappengine/issues/detail?id=3647 > >> >> - Fixed an issue with TypeError being incorrectly raised when > >> >> attachment > >> >> has Character Set and Language Information. > >> >> http://code.google.com/p/googleappengine/issues/detail?id=3836 > >> >> - Fixed an issue with Mail API attachments in unicode failing > >> >> in_check_attachments() > >> >> http://code.google.com/p/googleappengine/issues/detail?id=3900 > >> >> - Fixed an issue with ereporter not reporting errors when > applications > >> >> use namespaces. > >> >> http://code.google.com/p/googleappengine/issues/detail?id=4212 > >> >> - Fixed an issue with Dataviewer GQL stripping new lines after > initial > >> >> run > >> >> and a user paginates results. > >> >> http://code.google.com/p/googleappengine/issues/detail?id=4246 > >> >> - Fixed an issue with Python Unicode prefix in Datastore viewer. > >> >> http://code.google.com/p/googleappengine/issues/detail?id=4275 > >> >> - Fixed an issue with get_serving_url for images giving > non-cacheable > >> >> URLs > >> >> in dev_appserver. > >> >> http://code.google.com/p/googleappengine/issues/detail?id=4402 > >> >> - Fixed an issue with fancy_urllib using squid proxy server with > >> >> authentication. > >> >> http://code.google.com/p/googleappengine/issues/detail?id=4849 > >> >> - Fixed an issue with custom admin page not displaying when > restricted > >> >> to > >> >> only admins. > >> >> http://code.google.com/p/googleappengine/issues/detail?id=5117 > >> >> - Fixed an issue with dev_appserver_import_hook.py handling Crypto > >> >> import > >> >> accounts. > >> >> http://code.google.com/p/googleappengine/issues/detail?id=4612 > >> >> - Fixed an issue with Remote API gzip compression for transmitted > data. > >> >> http://code.google.com/p/googleappengine/issues/detail?id=5298 > >> >> - Fixed an issue with remote API shell not having pwd in Python > Path. > >> >> http://code.google.com/p/googleappengine/issues/detail?id=5317 > >> >> - Fixed an issue with Admin Console Logs < 30 minutes not being > >> >> available. > >> >> http://code.google.com/p/googleappengine/issues/detail?id=5494 > >> >> - Fixed an issue with Apps that are using Mail API reporting > >> >> “No Provider for address type rfc822” error. > >> >> http://code.google.com/p/googleappengine/issues/detail?id=5769 > >> >> - Fixed an issue with concurrent write access to Datastore stubs. > >> >> http://code.google.com/p/googleappengine/issues/detail?id=6058 > >> >> - Fixed an issue with Viewers being able to prohibit code downloads. > >> >> http://code.google.com/p/googleappengine/issues/detail?id=6255 > >> >> - Fixed an issue with billing applications that are disabled. > >> >> http://code.google.com/p/googleappengine/issues/detail?id=6344 > >> >> - Fixed an issue with deploying to an existing version > >> >> when an app has 10 versions. > >> >> http://code.google.com/p/googleappengine/issues/detail?id=6803 > >> >> - Fixed an issue with bulkloader “model” class not uploading > correctly. > >> >> http://code.google.com/p/googleappengine/issues/detail?id=6907 > >> >> - Fixed an issue with TextProperty in Datastore viewer. > >> >> http://code.google.com/p/googleappengine/issues/detail?id=6997 > >> >> - Fixed an issue with appcfg.py request_logs failing with ~oauth2 > >> >> http://code.google.com/p/googleappengine/issues/detail?id=7011 > >> >> - Fixed an issue with editing a bytestring field in Datastore > viewer. > >> >> http://code.google.com/p/googleappengine/issues/detail?id=7046 > >> >> - Fixed an issue with dev_appserver clearing after restart. This is > a > >> >> Windows only bug. > >> >> http://code.google.com/p/googleappengine/issues/detail?id=7244 > >> >> - Fixed an issue with Cron schedule failing on 1st day of month. > >> >> http://code.google.com/p/googleappengine/issues/detail?id=7286 > >> >> - Fixed an issue with gzip compression for application/plist content > >> >> type. > >> >> http://code.google.com/p/googleappengine/issues/detail?id=7641 > >> >> - Fixed an issue with datetime.datetime.fromtimestamp() in python > 2.7 > >> >> http://code.google.com/p/googleappengine/issues/detail?id=7819 > >> > > >> > -- > >> > You received this message because you are subscribed to the Google > >> > Groups > >> > "Google App Engine" group. > >> > To view this discussion on the web visit > >> > https://groups.google.com/d/msg/google-appengine/-/G5UG-1uMcQsJ. > >> > > >> > To post to this group, send email to [email protected]. > >> > To unsubscribe from this group, send email to > >> > [email protected]. > >> > For more options, visit this group at > >> > http://groups.google.com/group/google-appengine?hl=en. > -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To view this discussion on the web visit https://groups.google.com/d/msg/google-appengine/-/18VANVVIK8AJ. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en.
