Question

I’m trying to add a string column to a SQLite 3 database in rails. Use the normal syntax "rails generate migration AddAuthorColumnToPublications author:string". I run the migration, it works without errors.

I change the attributes accessor in the Publications model to include the Author column. I check in the schema, the new column has been included in the schema.

I go to my database and the new column does not appear in the index of the Publications table. I’ve tried including it specifically in the index, but to no avail.

The only thing I can think of here is that because I am using Ubuntu, the syntax may be slightly different (as it has been for certain things).

I have looked in books and on the internet, and the syntax seems correct (can also use underscores as well as camel casing to name the migration), but I can’t find anything specific to Ubuntu on this particular issue.
I would appreciate any and all help on this matter.

Answer 1

Run this command:

rake db:migrate

Migrations are not run automatically. You need to run rake db:migrate in order to run all the migrations and update the database.

Also, review your database.yml file and make sure that you’re using the sqlite database that you’re opening. The syntax of the command is not different.