From: CSN <cool_screen_name90001@yahoo.com>
To: Michael Fuhr <mike@fuhr.org>
Cc: pgsql-interfaces@postgresql.org
Subject: Re: ruby/postgres - getting assoc array of rows?
Date: Sun, 20 Nov 2005 02:31:45 -0800 (PST)
Message-ID: <20051120103145.96545.qmail@web52901.mail.yahoo.com> (raw)
In-Reply-To: <20051120053247.GA31157@winnie.fuhr.org>
I tried:
puts "by name: #{row['id']} #{row['name']}"
but it exits with:
pg.rb:16:in `[]': can't convert String into Integer (TypeError)
The by position line does work though.
thanks
csn
--- Michael Fuhr <mike@fuhr.org> wrote:
> On Sat, Nov 19, 2005 at 08:14:40PM -0800, CSN wrote:
> > Looking at the docs here:
> > http://ruby.scripting.ca/postgres/reference.html
> >
> > there doesn't appear to be an easy way to get an associative row
> > of rows returns.
>
> What exactly are you looking for? The example you posted returns
> an array of hashes, but depending on what you're doing all that
> work might not be necessary. PGconn#exec returns a PGresult object,
> the PGresult#each iterator yields PGrow objects, and PGrow#[] accepts
> both numeric and text indexes. Example:
>
> % psql -d test -c 'SELECT id, name FROM people'
> id | name
> ----+-------
> 1 | Alice
> (1 row)
>
> % cat test.rb
> require 'postgres'
> conn = PGconn.new('dbname=test')
> res = conn.exec('SELECT id, name FROM people')
> res.each do |row|
> puts "by name: #{row['id']} #{row['name']}"
> puts "by position: #{row[0]} #{row[1]}"
> end
> res.clear
> conn.close
>
> % ruby test.rb
> by name: 1 Alice
> by position: 1 Alice
>
> You could also convert the PGresult object into an array of PGrow
> objects with a one-liner, although you wouldn't get automatic bytea
> handling as in the function you posted:
>
> rows = res.collect
>
> Will any of this work for you? If not then please provide more
> detail.
>
> --
> Michael Fuhr
>
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To: pgsql-interfaces@postgresql.org
Cc: cool_screen_name90001@yahoo.com, mike@fuhr.org
Subject: Re: ruby/postgres - getting assoc array of rows?
In-Reply-To: <20051120103145.96545.qmail@web52901.mail.yahoo.com>
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