Rails aborted migrate command

Question

In trying to do the command $rails db:migrate, I receive the following error:

    $ rails db:migrate RAILS_ENV=test
    rails aborted!
    StandardError: An error has occurred, this and all later migrations canceled:
    Directly inheriting from ActiveRecord::Migration is not supported. Please specify the Rails release the migration was written for:

How do I specify the release the migration was written for? What file is this in? Thanks!

Mosaaleb · Accepted Answer · 2020-06-14 09:50:29Z

6

Rails prevent from inheriting from ActiveRecord::Migration that's because migration API can change between different versions.

To solve it provide the version that you need for all your migration files: ActiveRecord::Migration[version_number]

class MigrationClassName < ActiveRecord::Migration[5.2]
end

answered Jun 14, 2020 at 9:50

Mosaaleb

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4 Comments

NR 15 Over a year ago

Hi thank you for this! I didn't receive a notification to this question. As I've said, I'm very new to this... where exactly do I add this line? What file?

Mosaaleb Over a year ago

Add it to all files inside db/migrate. Just add the version at the end of every ActiveRecord::Migration. Also, what Rails version you use? what is the value of executing ActiveRecord::Migration.current_version in Rails console?

NR 15 Over a year ago

Thank you! That helped and executed the command successfully!

NR 15 Over a year ago

Also, I'm using ruby 2.6.3p62 (2019-04-16 revision 67580) [x86_64-linux]

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