ActiveRecord::ArrayTypeMismatch must be an Array or have a valid array value

Question

I have a model with an attribute of type date_array. The database is postgresql. When updating the model with the value of the attribute being an array of correctly formatted date strings, I get this error:

ActiveRecord::ArrayTypeMismatch (shipdates must be an Array or have a valid array value (''{"2014-01-16","2014-01-17","2014-01-18","2014-01-21"}'')):
  app/controllers/vendor/orders_controller.rb:59:in `update'


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Postgres expects date_arrays to be a string like this: {"2014-01-16","2014-01-17","2014-01-18","2014-01-21"}

From the error message it appears that the value is getting enclosed in extra quotation marks. Not sure why.

Answer 1

Turns out the issue is a bug in one of the gems I was using. The gem is called activerecord-postgres-array and the latest bundle install must have pulled in this bug: https://github.com/tlconnor/activerecord-postgres-array/issues/37

I have updated my gemfile to use version 0.0.8 of this gem. The update works fine now.

Gemfile:

gem 'activerecord-postgres-array', '0.0.8'