Question

I’m trying to update field on duplicate key, but it just adds new records instead of updating.

Here is what i’m trying to do

ActiveRecord::Base.connection.execute "insert into open_offer_counters (offer_id, udid, open_counter) values #{opened_events.join(", ")} on duplicate key update open_counter = open_counter + 1"

In my migration I pointed on 2 unique fields

create_table :open_offer_counters do |t|
    t.integer :offer_id,            :unique => true
    t.string  :udid,                :unique => true
    t.integer :open_counter
  t.timestamps
end

Any ideas whats wrong with code?

Answer 1

You need to add a unique index on these columns, such as

add_index :open_offer_counters, :offer_id, :unique => true

Passing :unique as a column option doesn’t do anything