Question

In our PostgreSQL-backed Rails project, when running rspec using spork, sometimes we receive the following error:

ActiveRecord::StatementInvalid:
   PG::Error: ERROR:  prepared statement "a1" already exists

Originally, it occurred only a few times a day, but recently, it has begun happening every 3-4 test runs which slows our development efforts to a crawl.

Is there a way to reset/delete the prepared statements in PostgreSQL somewhere inside of our spec_helper.rb file?

Answer 1

After searching the PostgreSQL docs and a fair amount of trial and error testing it in different spots inside the spec_helper.rb, I finally figured out that I could add the following to delete all existing prepared statements and I have not since seen the error:

RSpec.configure do |config|
  # ... other code

  config.after(:suite) do
    ActiveRecord::Base.connection.execute("DEALLOCATE ALL")
  end

  # ... other code
end