Q:

how to run schema.rb?

I'm trying to run db:migrate.
This fails however because one of the tables that one of the migrations is trying to update does not exist. I searched the codebase and this table is created in db/schema.rb.
How can I run schema.rb before db:migrate??

A:

Use the schema load task:
rake db:schema:load

From rake -T (expurgated version):
rake db:schema:dump  # Create db/schema.rb file usable with any AR-supported DB
rake db:schema:load  # Load schema.rb file into DB

