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require 'spec_helper'
module Arel
describe Lock do
before do
@relation = Table.new(:users)
end
describe '#to_sql' do
it "manufactures a simple select query lock" do
sql = @relation.lock.to_sql
adapter_is :mysql do
sql.should be_like(%Q{
SELECT `users`.`id`, `users`.`name`
FROM `users` FOR UPDATE
})
end
adapter_is :postgresql do
sql.should be_like(%Q{
SELECT "users"."id", "users"."name"
FROM "users" FOR UPDATE
})
end
adapter_is :sqlite3 do
sql.should be_like(%Q{
SELECT "users"."id", "users"."name"
FROM "users"
})
end
adapter_is :oracle do
sql.should be_like(%Q{
SELECT "USERS"."ID", "USERS"."NAME"
FROM "USERS" FOR UPDATE
})
sql_with_order_by = @relation.order(@relation[:id]).take(1).lock.to_sql
sql_with_order_by.should be_like(%Q{
SELECT "USERS"."ID", "USERS"."NAME"
FROM "USERS"
WHERE "ID" IN (select * from
(SELECT "ID" FROM "USERS" ORDER BY "USERS"."ID" ASC)
where rownum <= 1)
FOR UPDATE
})
end
end
it "manufactures a select query locking with a given lock" do
sql = @relation.lock("LOCK IN SHARE MODE").to_sql
adapter_is :mysql do
sql.should be_like(%Q{
SELECT `users`.`id`, `users`.`name`
FROM `users` LOCK IN SHARE MODE
})
end
adapter_is :postgresql do
sql.should be_like(%Q{
SELECT "users"."id", "users"."name"
FROM "users" LOCK IN SHARE MODE
})
end
adapter_is :sqlite3 do
sql.should be_like(%Q{
SELECT "users"."id", "users"."name"
FROM "users"
})
end
adapter_is :oracle do
sql.should be_like(%Q{
SELECT "USERS"."ID", "USERS"."NAME"
FROM "USERS" LOCK IN SHARE MODE
})
end
end
end
end
end
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