On Monday, November 5, 2012 11:12:19 PM UTC-8, Snarke wrote:
>
> About 18 months ago, I needed to get Sequel to cough up a list of foreign
> keys for a model. I did it by slapping on a PostgreSQL-specific extension:
>
> module Sequel
> class Model
> def self.foreign_keys
> Hash[*DB["SELECT tc.constraint_name,
> kcu.column_name
> FROM information_schema.table_constraints
> AS tc JOIN information_schema.key_column_usage AS kcu using
> (constraint_name)
> WHERE constraint_type = 'FOREIGN KEY' AND
> tc.table_name='#{self.table_name}'"].collect{|row|
> [row[:column_name].to_sym,
> row[:constraint_name]]
> }.flatten]
> end
> end
> end
>
> There've been a lot of newer releases since I wrote that. Is there now a
> built-in way to access foreign keys?
Database#foreign_key_list has been added and works on quite a few database
types that Sequel supports, including PostgreSQL.
Thanks,
Jeremy
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