Hi All,
Has anyone worked with Rails 3 and Postgresql schemas? I'm working on a
multi-tenant Rails3 (beta 4) application where each account will have it's
own schema in a postgresql database. What I've done so far (with help from
http://www.developerit.com/2010/05/07/creating-a-multi-tenant-application-using-postgresqls-schemas-and-rails),
is to create an Account and then call a method that creates a new postgres
schema and then load the rails schema.rb into the newly created schema.
The method I call after creation is the following:
def self.create_new_schema_and_load_rails_schema(schema)
conn = ActiveRecord::Base.connection
conn.execute("CREATE SCHEMA #{schema}")
conn.execute("SET search_path TO #{schema}")
file = "#{Rails.root}/db/schema.rb"
load(file)
conn.execute("SET search_path TO #{conn.schema_search_path}")
end
*
This fails at 'load(file)'. When I attempt to do something similar in the
console: *
>Account.create(:name => 'Draper', :domain => 'dondraper.com')
>conn.execute("create schema dondraper")
>conn.execute("SET search_path TO dondraper")
>file = "#{Rails.root}/db/schema.rb"
>load(file)
*
I get the following error:*
-- create_table("accounts", {:force=>true})
ActiveRecord::StatementInvalid: PGError: ERROR: table "accounts" does not
exist
: DROP TABLE "accounts"
from
/usr/local/lib/ruby/gems/1.8/gems/activerecord-3.0.0.beta4/lib/active_record/connection_adapters/abstract_adapter.rb:210:in
`log'
from
/usr/local/lib/ruby/gems/1.8/gems/activerecord-3.0.0.beta4/lib/active_record/connection_adapters/postgresql_adapter.rb:464:in
`execute'
from
/usr/local/lib/ruby/gems/1.8/gems/activerecord-3.0.0.beta4/lib/active_record/connection_adapters/abstract/schema_statements.rb:192:in
`drop_table'
from
/usr/local/lib/ruby/gems/1.8/gems/activerecord-3.0.0.beta4/lib/active_record/connection_adapters/abstract/schema_statements.rb:112:in
`create_table'
from
/usr/local/lib/ruby/gems/1.8/gems/activerecord-3.0.0.beta4/lib/active_record/migration.rb:356:in
`send'
from
/usr/local/lib/ruby/gems/1.8/gems/activerecord-3.0.0.beta4/lib/active_record/migration.rb:356:in
`method_missing'
from
/usr/local/lib/ruby/gems/1.8/gems/activerecord-3.0.0.beta4/lib/active_record/migration.rb:332:in
`say_with_time'
from /usr/local/lib/ruby/1.8/benchmark.rb:293:in `measure'
from
/usr/local/lib/ruby/gems/1.8/gems/activerecord-3.0.0.beta4/lib/active_record/migration.rb:332:in
`say_with_time'
from
/usr/local/lib/ruby/gems/1.8/gems/activerecord-3.0.0.beta4/lib/active_record/migration.rb:352:in
`method_missing'
from /home/admin/a2/db/schema.rb:14
from
/usr/local/lib/ruby/gems/1.8/gems/activerecord-3.0.0.beta4/lib/active_record/schema.rb:49:in
`instance_eval'
from
/usr/local/lib/ruby/gems/1.8/gems/activerecord-3.0.0.beta4/lib/active_record/schema.rb:49:in
`define'
from /home/admin/a2/db/schema.rb:12
from
/usr/local/lib/ruby/gems/1.8/gems/activesupport-3.0.0.beta4/lib/active_support/dependencies.rb:208:in
`load'
from
/usr/local/lib/ruby/gems/1.8/gems/activesupport-3.0.0.beta4/lib/active_support/dependencies.rb:208:in
`load'
from
/usr/local/lib/ruby/gems/1.8/gems/activesupport-3.0.0.beta4/lib/active_support/dependencies.rb:198:in
`load_dependency'
from
/usr/local/lib/ruby/gems/1.8/gems/activesupport-3.0.0.beta4/lib/active_support/dependencies.rb:554:in
`new_constants_in'
from
/usr/local/lib/ruby/gems/1.8/gems/activesupport-3.0.0.beta4/lib/active_support/dependencies.rb:198:in
`load_dependency'
from
/usr/local/lib/ruby/gems/1.8/gems/activesupport-3.0.0.beta4/lib/active_support/dependencies.rb:208:in
`load'
*
However*,
When I reset the search path to the public schema and attempt to load the
file it works flawlessly.
Does anyone have any idea what might be the problem? Or perhaps, someone has
some ideas or online resources about creating new postgresql schemas from
within a rails application?
Any help will be much appreciated.
Thanks,
Mike
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