Postgres fejl med Sinatra/Haml/DataMapper på Heroku

Det ser ud til, at post_id er af typen TEXT i stedet for INTEGER. For at rette op på dette skal du ændre datatypen. Dette er blevet ændret i version 8.3, ældre version har en implicit rollebesætning. Du kan bede PostgreSQL om at gøre det:

CREATE FUNCTION pg_catalog.text(integer) RETURNS text STRICT IMMUTABLE LANGUAGE SQL AS 'SELECT textin(int4out($1));';
CREATE CAST (integer AS text) WITH FUNCTION pg_catalog.text(integer) AS IMPLICIT;

CREATE FUNCTION pg_catalog.text(smallint) RETURNS text STRICT IMMUTABLE LANGUAGE SQL AS 'SELECT textin(int2out($1));';
CREATE CAST (smallint AS text) WITH FUNCTION pg_catalog.text(smallint) AS IMPLICIT;

CREATE FUNCTION pg_catalog.text(bigint) RETURNS text STRICT IMMUTABLE LANGUAGE SQL AS 'SELECT textin(int8out($1));';
CREATE CAST (bigint AS text) WITH FUNCTION pg_catalog.text(bigint) AS IMPLICIT;

Se også http://wiki.postgresql.org/wiki/Image :Pg83-implicit-casts.sql