The release of Django 1.0 comes with a promise of API stability and forwards-compatibility. In a nutshell, this means that code you develop against a 1.X version of Django will continue to work with future 1.X releases. You may need to make minor changes when upgrading the version of Django your project uses: see the “Backwards incompatible changes” section of the release note for the version or versions to which you are upgrading.
In this context, stable means:
All the public APIs (everything in this documentation) will not be moved or renamed without providing backwards-compatible aliases.
If new features are added to these APIs – which is quite possible – they will not break or change the meaning of existing methods. In other words, “stable” does not (necessarily) mean “complete.”
If, for some reason, an API declared stable must be removed or replaced, it will be declared deprecated but will remain in the API for at least two minor version releases. Warnings will be issued when the deprecated method is called.
See Official releases for more details on how Django’s version numbering scheme works, and how features will be deprecated.
We’ll only break backwards compatibility of these APIs if a bug or security hole makes it completely unavoidable.
In general, everything covered in the documentation – with the exception of anything in the internals area is considered stable.
There are a few exceptions to this stability and backwards-compatibility promise.
If we become aware of a security problem – hopefully by someone following our security reporting policy – we’ll do everything necessary to fix it. This might mean breaking backwards compatibility; security trumps the compatibility guarantee.
Certain APIs are explicitly marked as “internal” in a couple of ways:
django.contrib.localflavor contains assorted pieces of code that are useful for particular countries or cultures. This data is local in nature, and is subject to change on timelines that will almost never correlate with Django’s own release schedules. For example, a common change is to split a province into two new provinces, or to rename an existing province.
These changes present two competing compatibility issues. Moving forward, displaying the names of deprecated, renamed and dissolved provinces in a selection widget is bad from a user interface perspective. However, maintaining full backwards compatibility requires that we support historical values that may be stored in a database – including values that may no longer be valid.
Therefore, Django has the following policy with respect to changes in local flavor:
For example, Django 1.2 contains an Indonesian localflavor. It has a province list that includes “Nanggroe Aceh Darussalam (NAD)” as a province. The Indonesian government has changed the official name of the province to “Aceh (ACE)”. As a result, Django 1.3 does not contain “Nanggroe Aceh Darussalam (NAD)” in the province list, but does contain “Aceh (ACE)”.
Jul 20, 2015