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StandardError Directly inheriting from ActiveRecord::Migration is not supported. Please specify the Active Record release the migration was written for: class AddAttachmentImageToPosts < ActiveRecord::Migration[7.0] Extracted source (around line #596):

    major = ActiveRecord::VERSION::MAJOR
    minor = ActiveRecord::VERSION::MINOR
    raise StandardError, "Directly inheriting from ActiveRecord::Migration is not supported. " \
      "Please specify the Active Record release the migration was written for:\n" \
      "\n" \
      "  class #{subclass} < ActiveRecord::Migration[#{major}.#{minor}]"

Directly inheriting from ActiveRecord::Migration is not supported. Please specify the Active Record release the migration was written for: class AddAttachmentImageToPosts < ActiveRecord::Migration[7.0] Extracted source (around line #596):

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    Are you setting up local environment for an old rails app? run rake db:setup or rake db:schema:loadinstead of running all the old migrations. Commented Feb 2, 2024 at 1:55
  • This error is shown, when you try running old migrations that were created with old version of Ruby on Rails with up-to-date versions. Follow the advice @BroiSatse gave, or you need to fix all old migrations to follow the conventions for current versions of Ruby on Rails. Commented Feb 2, 2024 at 9:30
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