rspec returns “PG::Error: ERROR: relation ”table_name“ does not exist”

Question

Environment is REE(2011.12) on rvm, rspec 2.8.0, rails 3.0.6, and pg 0.13.2. Using PostgreSQL 8.3.17 on CentOS 5.6. The db:migrate have work correctly. But rspec have got follow

Answer 1

I've run into this in two instances (updated 6/13/2012):

First:

I haven't yet migrated my test database...

rake db:migrate

...which you need to do before both db:test:prepare and db:test:load.

When you invoke rspec it should prepare and load your database for you anyway. You shouldn't have to do that by hand.

Second:

A typo in my migration. I accidentally reversed my table and column names in the parameter list.

A migration on a Rails 3.1 project:

def change
  add_column :had_import_errors, :studies, :boolean, :default => false
  add_column :import_data_cache, :studies, :text
end

...which is wrong, because has_import_errors and import_data_cache are my column names, and they therefore should come second, not first.

The correct migration, with the table name first was:

def change
  add_column :studies, :had_import_errors, :boolean, :default => false
  add_column :studies, :import_data_cache, :text
end