I confirm, "postgres" package is outdated, you need "pg".
It tooks me lot of time just to get a basic select * from films working with ruby and postgres. As I am kind, here is my code:
postgres preparation (database=megatest user=roger pass=123456 table=films)
$ su postgres
psql
CREATE USER roger WITH PASSWORD '123456';
GRANT ALL PRIVILEGES ON DATABASE megatest to roger;
megatest=# GRANT SELECT ON films TO PUBLIC;
PG package preparation
sudo gem install pg
Ruby Code
require 'pg'
conn=PGconn.connect( :hostaddr=>"127.0.0.1", :port=>5432, :dbname=>"megatest", :user=>"roger", :password=>'123456')
# or for a non IP address :host => 'my.host.name.com' instead of hostaddr
# run the query
res = conn.exec("SELECT * FROM films")
# Ran only once in order to get field Name
fieldArray=res.fields()
fieldArray.each do |elem|
print "elem="+elem+"\n"
end
# print data from the query
res.each{ |row|
puts "Code="+row["code"] +" title="+row["title"] +" did="+row["did"] +" date_prod="+row["date_prod"] +" kind="+row["kind"] +" len="+row["len"]
}
Results
root@eblain-VirtualBox:/home/eblain/ruby# ruby postgresTest.rb
Code=UA502 title=Bananas did=105 date_prod=1971-07-13 kind=Comedy len=01:22:00
Code=UA503 title=Cowboy did=105 date_prod=1979-07-13 kind=Horror len=01:32:00
Code=UA544 title=YoBro did=105 date_prod=1981-07-13 kind=Action len=01:42:00
