sync.fetch TypeError (wrong argument type Hash (expected String)): postgresql #21

I'm working on trying to implement the fetch method into my ruby app, and it does fire, however when trying to run the execute script i get the following error

TypeError (wrong argument type Hash (expected String)):

I can see the console output and it's obvious of why it's happening:

{:table=>"user", :statement=>"created", :properties=>#<BaseCRM::User id=660957, name="Richard Walsh", email="", created_at="2015-03-17T23:49:00Z", updated_at="2015-07-28T18:38:45Z", confirmed=true, role="admin", status="active">}

It's passing a hash instead of forming a sql insert statement, has anyone had any luck working this into postgresql?

base_sync.fetch do |meta, resource|
      options = {
        table: meta.type,
        statement: meta.sync.event_type,
        properties: resource
      }

      ActiveRecord::Base.connection.execute(options) ? meta.sync.ack : meta.sync.nack
end

I've tried to break resource down to get the keys and values as separate arrays even to create a sql insert statement, but I can't even seem to manage to get that working. The resource returns nil as I try to decompose it.

I should also note that I've implemented via Rails 4.