On Fri, 2020-04-10 at 12:08 +0100, Stephen Finucane wrote: > Now that we're moving a new major version, we can squash the migrations > we have to date. This coexists alongside the old migrations, which we > can remove and replace entirely when we release 4.0, per the advice of > the 'squashmigrations' tool. > > You should commit this migration but leave the old ones in place; the > new migration will be used for new installs. Once you are sure all > instances of the codebase have applied the migrations you squashed, > you can delete them. > > The 'squashmigrations' tool can't parse the output of 'RunPython' blocks > so the output of the tool was less optimized than it could be. As a > result, we've manually modified this change to remove the 'RunPython' > block and unnecessary 'AlterField' entries. This was done by removing > all migration and generating a new "initial" migration, which was then > modified to mark all strings as byte strings (as they were when we were > using Python 2 to generate these migrations) so that 0041 would apply > cleanly. > > The main benefit of this change is that it significantly reduces the > startup time for unit tests. Executed on my host, the run time for a > single test goes from ~ 22 seconds to ~ 14 seconds. This is obviously > reduced for additional tests. > > Signed-off-by: Stephen Finucane <step...@that.guru> > Cc: Daniel Axtens <d...@axtens.net>
Given the results of the below testing, I'm pretty happy with this so I've gone ahead and applied it. Stephen > NOTE: I tested this by removing every other migration and attempting to > recreate the one migration that's not in this squash - 0041. It resulted > in the exact same migration, albeit with the number 0002, so this looks > good. _______________________________________________ Patchwork mailing list Patchwork@lists.ozlabs.org https://lists.ozlabs.org/listinfo/patchwork
