You need to call .reset_column_information in third migration. Please refer https://api.rubyonrails.org/classes/ActiveRecord/ModelSchema/ClassMethods.html#method-i-reset_column_information for details.
You can insert and update data in migration, but you might want to consider using db/seeds.rb instead. https://guides.rubyonrails.org/active_record_migrations.html#migrations-and-seed-data HTH 2019年3月27日(水) 23:36 <t...@stinto.com>: > I'm running Rails 5.0.6, and I can't Google myself to any other occurences > of this problem. > > The migrations fail when I have a migration that inserts data into a > table, that has data for a column that was added in a previous migration > file executed by the same migrate command > > Basically I have 3 migrations that are run with the following command > rails db:migrate > > > first migration chronologically: > > create_table :campaign_orders do |t| > t.integer :order > end > > > second migration: > > add_column :campaign_orders, :priority, :integer > > > third migration: > > CampaignOrder.create(order: 0, priority: 1) > > > The third migration fails, if all migrations are outstanding when running > migrate command, but succeeds if you run the migrate command again. It > fails with the following error: > >> rails aborted! >> StandardError: An error has occurred, all later migrations canceled: >> unknown attribute 'priority' for CampaignOrder. >> /Users/tomwilliams/Projects/incard-rails/db/migrate/20190326143614_insert_accepted_email_campaign.rb:66:in >> `up' >> /Users/tomwilliams/Projects/incard-rails/bin/rails:9:in `require' >> /Users/tomwilliams/Projects/incard-rails/bin/rails:9:in `<top (required)>' >> /Users/tomwilliams/Projects/incard-rails/bin/spring:15:in `<top >> (required)>' >> bin/rails:3:in `load' >> bin/rails:3:in `<main>' >> Caused by: >> ActiveModel::UnknownAttributeError: unknown attribute 'priority' for >> CampaignOrder. >> /Users/tomwilliams/Projects/incard-rails/db/migrate/20190326143614_insert_accepted_email_campaign.rb:66:in >> `up' >> /Users/tomwilliams/Projects/incard-rails/bin/rails:9:in `require' >> /Users/tomwilliams/Projects/incard-rails/bin/rails:9:in `<top (required)>' >> /Users/tomwilliams/Projects/incard-rails/bin/spring:15:in `<top >> (required)>' >> bin/rails:3:in `load' >> bin/rails:3:in `<main>' >> Tasks: TOP => db:migrate >> (See full trace by running task with --trace) > > > Now, I can just *"fix"* it by running the migrate command again, or as I > did, rollback the migrations and put the added column in the create table > migration and deleting the add_column migration. > > My question is - does anybody know if this is a known issue, and if so, > could someone provide a link. > > -- > You received this message because you are subscribed to the Google Groups > "Ruby on Rails: Talk" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to rubyonrails-talk+unsubscr...@googlegroups.com. > To post to this group, send email to rubyonrails-talk@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/rubyonrails-talk/1eb04bc6-7c56-4555-a90e-47b18a2f8d60%40googlegroups.com > <https://groups.google.com/d/msgid/rubyonrails-talk/1eb04bc6-7c56-4555-a90e-47b18a2f8d60%40googlegroups.com?utm_medium=email&utm_source=footer> > . > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To unsubscribe from this group and stop receiving emails from it, send an email to rubyonrails-talk+unsubscr...@googlegroups.com. To post to this group, send email to rubyonrails-talk@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/rubyonrails-talk/CA%2BfENYVPaY3Q-EAJEVB96M%2B9tfGAEDE6NJaOQrtzK9g6chmCWA%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
