I'm trying to evolve a very old database (Beta 0.8) to version 1.5,
and running into a problem. When I try the command: rb-site manage /
site/www/legacyrb evolve -- --execute
I get the message:
The stored evolutions do not completely resolve all model changes.
Run `./manage.py evolve --hint` to see a suggestion for the changes
required.
The following are the changes that could not be resolved:
In model reviews.DefaultReviewer:
Field 'repository' has been added
In model reviews.ReviewRequest:
Field 'changedescs' has been added
Field 'shipit_count' has been added
Field 'last_review_timestamp' has been added
In field 'repository':
Property 'null' has changed
...
In model diffviewer.FileDiff:
Field 'status' has been added
Field 'parent_diff' has been added
Field 'diff' has been added
Field 'diff_base64' has been deleted
In field 'source_file':
Property 'max_length' has changed
In field 'dest_file':
Property 'max_length' has changed
Question 1: Ummm...why couldn't those changes be resolved? Will they
be resolved with a syncdb?
So I follow the command's advice, and execute "evolve --hint", which
tells me (among other things):
#----- Evolution for diffviewer
from django_evolution.mutations import *
from django.db import models
MUTATIONS = [
AddField('DiffSet', 'basedir', models.CharField, initial=u'',
max_length=256),
AddField('FileDiff', 'status', models.CharField, initial=<<USER
VALUE REQUIRED>>, max_length=1),
AddField('FileDiff', 'parent_diff', models.Base64Field,
initial='', db_column='parent_diff_base64'),
AddField('FileDiff', 'diff', models.Base64Field, initial=<<USER
VALUE REQUIRED>>, db_column='diff_base64'),
So I figure, "Okay, we have the hints--we just need to execute them."
So I ran:
# rb-site manage /infrastructure/www/legacyrb evolve -- --hint --
execute
Cannot use hinted evolution: AddField or ChangeField mutation for
'FileDiff.status' in 'diffviewer' requires user-specified initial
value.
So, questions:
2) How can I specify an appropriate user value?
3) The evolution file for filediff.status, where a USER VALUE REQUIRED
says:
MUTATIONS = [
AddField('FileDiff', 'status', models.CharField, initial='M',
max_length=1)
]
Looks to me like an initial value is there, and it's an 'M'. What's
the problem?
4) Can I use evolution in this case, or do I need to resort to just
making the required changes at the SQL level? If so, how are the
'db_column' parameters handled?
Thanks,
m@
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