Derived Models are not auto-migrated
Reported by Postmodern | July 6th, 2008 @ 01:39 AM
When creating models which are derived from an auto-migratable model, DataMapper.auto_migrate! will not migrate these derived classes. Also, the fact that one has to include AutoMigrations into a model makes it difficult to force derived classes to be auto-migratable by re-including AutoMigrations.
require 'dm-core'
DataMapper.setup(:default, {:adapter => 'sqlite3', :database => 'test.db'})
class Base
include DataMapper::Resource
include DataMapper::AutoMigrations
include DataMapper::Types
property :id, Serial
property :x, Integer
end
class Test < Base
property :y, Integer
end
DataMapper.auto_migrate!
# => #<Set: {Base}>
$ sqlite3 test.db
sqlite> .dump
BEGIN TRANSACTION;
CREATE TABLE "bases" ("id" INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT, "x" INTEGER);
DELETE FROM sqlite_sequence;
COMMIT;
Comments and changes to this ticket
-
Postmodern July 6th, 2008 @ 09:22 PM
Also, forcibly migrating the derived models has no effect.
Test.auto_migrate! # => true$ sqlite3 test.db sqlite> .dump BEGIN TRANSACTION; DELETE FROM sqlite_sequence; CREATE TABLE "bases" ("id" INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT, "x" INTEGER); COMMIT; -
Aadi Deshpande July 8th, 2008 @ 12:49 AM
i noticed you don't have any STI declarations :
property :type, Discriminator
Is that intended?
I don't think DM supports other forms of inheritance ( other than STI ) yet, so might this be related to that?
-
Dan Kubb (dkubb) July 9th, 2008 @ 11:31 PM
- State changed from “new” to “invalid”
A Discriminator property needs to be set in order to use STI. Marking this ticket as invalid.
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Dan Kubb (dkubb)