e728f737ca
Main issue is that we can't create unique constraint for columns, because
we are using soft deletion of entries (set `deleted` column to True).
The main idea is to use `deleted` columns to create unique constraint for
columns. For example (`col1`, `deleted`).
To make (`col1`, `deleted`) unique after entry deletion, we should assign the
value of `id` to `deleted` column.
Change type of `deleted` column from Boolean to table.id.type for all tables.
Change models.soft_delete() method to assign table.id instead of True to
`deleted` column.
Change query.soft_delete() method to assign literal_column("id") instead of True
Change in db.models all occurrences of Table.deleted == False =>
Table.deleted == correct_type (0 or "")
Value of `deleted` property of entries is used in public nova api. To keep API
as is, we should change XMLDictSerializer by converting the type of
`deleted` property to string representation of boolean.
Change db.api.model_query() method to make it work with different types
of `deleted` column.
If we are using as model that is not subclass of NovaBase we should set
parameter base_model as subclass of NovaBase that corresponds to model.
Change in db.api all occurrences of using model_query with model that is not
subclass of NovaBase.
blueprint db-unique-keys
Change-Id: Ie1f67f49a5d085e6371efb63fc23a1c8b25d9464
OpenStack Nova README
OpenStack Nova provides a cloud computing fabric controller, supporting a wide variety of virtualization technologies, including KVM, Xen, LXC, VMWare, and more. In addition to its native API, it includes compatibility with the commonly encountered Amazon EC2 and S3 APIs.
OpenStack Nova is distributed under the terms of the Apache License, Version 2.0. The full terms and conditions of this license are detailed in the LICENSE file.
Nova primarily consists of a set of Python daemons, though it requires and integrates with a number of native system components for databases, messaging and virtualization capabilities.
To keep updated with new developments in the OpenStack project follow @openstack on Twitter.
To learn how to deploy OpenStack Nova, consult the documentation available online at:
In the unfortunate event that bugs are discovered, they should be reported to the appropriate bug tracker. If you obtained the software from a 3rd party operating system vendor, it is often wise to use their own bug tracker for reporting problems. In all other cases use the master OpenStack bug tracker, available at:
Developers wishing to work on the OpenStack Nova project should always base their work on the latest Nova code, available from the master GIT repository at:
Developers should also join the discussion on the mailing list, at:
Any new code must follow the development guidelines detailed in the HACKING.rst file, and pass all unit tests. Further developer focused documentation is available at:
For information on how to contribute to Nova, please see the contents of the CONTRIBUTING.rst file.
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