Open Stack

On Oct 21, 2013, at 1:40 PM, Tim Simpson wrote:

>>> 2. I also think a datastore_version alone should be sufficient since the associated datastore type will be implied:
> 
>> When i brought this up it was generally discussed as being confusing. Id like to use type and rely on having a default (or active) version behind the scenes.
> 
> Can't we do both? If a user wants a specific version, most likely they had to enumerate all datastore_versions, spot it in a list, and grab the guid. Why force them to also specify the datastore_type when we can easily determine what that is?

Fair enough.

> 
>>> 4. Additionally, in the current pull request to implement this it is possible to avoid passing a version, but only if no more than one version of the datastore_type exists in the database.
>>> 
>>> I think instead the datastore_type row in the database should also have a "default_version_id" property, that an operator could update to the most recent version or whatever other criteria they wish to use, meaning the call could become this simple:
> 
>> Since we have determined from this email thread that we have an active status, and that > 1 version can be active, we have to think about the precedence of active vs default. My question would be, if we have a default_version_id and a active version, what do we choose on behalf of the user? If there is > 1 active version and a user does not specify the version, the api will error out, unless a default is defined. We also need a default_type in the config so the existing APIs can maintain compatibility. We can re-discuss this for v2 of the API.
> 
> Imagine that an operator sets up Trove and only has one active version. They then somehow fumble setting up the default_version, but think they succeeded as the API works for users the way they expect anyway. Then they go to add another active version and suddenly their users get error messages.
> 
> If we only use the "default_version" field of the datastore_type to define a default would honor the principle of least surprise.

Are you saying you must have a default version defined to have > 1 active versions?
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 495 bytes
Desc: Message signed with OpenPGP using GPGMail
URL: <http://lists.openstack.org/pipermail/openstack-dev/attachments/20131021/325b1a16/attachment.pgp>