What is the s~ prefix?

[Joshua Fox]

On occasion App Engine APIs prefix "s~" to app names. This happens in Datastore   keys, but also  or example this error message on deployment:

                 You do not have permission to modify this app (app_id=u's~xyz')

In what contexts   do I need to treat my app id as "s~xyz" and in what contexts is it "xyz"?

[pdknsk]

This prefix was added to differentiate between HRD apps and legacy apps. In practice you should never worry about the prefix and always use the prefix-less name.

https://cloudplatform.googleblog.com/2011/01/announcing-high-replication-datastore.html

[Jordan (Cloud Platform Support)]

To add onto pdknsk's answer,  App Engine project names that have the "s~" prefix mean that you selected to have your application hosted in America during project creation time. 

Alternatively you could also see the "e~" prefix if you selected Europe as your App Engine project region. It is best practice to use the App Engine project name without the prefix. 

[Joshua Fox]

On Mon, Apr 10, 2017 at 9:02 PM, 'Jordan (Cloud Platform Support)' via Google App Engine <google-a...@googlegroups.com> wrote:

To add onto pdknsk's answer,  App Engine project names that have the "s~" prefix mean that you selected to have your application hosted in America during project creation time. 

Alternatively you could also see the "e~" prefix if you selected Europe as your App Engine project region. It is best practice to use the App Engine project name without the prefix. 

I generally do. But if a Google API returns a value with prefix, and I need to compare project names, then  I need to use the prefix.  Google APIs seem inconsistent about returning values with/without the prefix.

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JOSHUA FOX

Principal Software Architect | Freightos

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[Jeff Schnitzer]

It’s unfortunate but:  Always strip off ~ and anything before it when an appid comes from an API. Then you don’t need to think about it.

Jeff

On Sat, Apr 15, 2017 at 10:51 PM, Joshua Fox <jos...@freightos.com> wrote:

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