27 Jan
2012
27 Jan
'12
12:24 p.m.
On Fri, Jan 27, 2012 at 3:04 PM, Johannes Waldmann
data T_orig = T_orig Foo $(deriveSafeCopy 0 'base ''T_orig) data T = T Foo Bar $(deriveSafeCopy 0 'extension ''T) instance Migrate T where type MigrateFrom T = T_Orig ...
As you can read from deriveSafeCopy's documentation [1], you need to increase the version of your data type (e.g. change that zero to one). HTH, [1] http://hackage.haskell.org/packages/archive/safecopy/0.6.1/doc/html/Data-Saf... -- Felipe.