ActiveRecord does not serialize arrays for native Postgres array type columns

[tadast]

The issue occurs when using #update_column, #update_columns and #update_all on a column of native postgres array type.

SomeTable.first.update_column(:array_column, ['value_1', 'value_2'])
>> UPDATE "some_tables" SET "array_column" = 'value_1','value_2'...

I think the issue is here where the value is passed in to the method with no information about the column type and therefore postgres specific quoting can not be invoked.

If my thinking is correct I can try to fix this

[senny]

I can reproduce this problem on master => https://gist.github.com/senny/6725398

Please do submit a PR to fix the issue.