Ruby on rails ActiveRecord:：PendingMigrationError迁移处于挂起状态

我认为这个迁移中存在这个问题，但我是rails新手，不确定

 class AddPasswordDigestToUsers < ActiveRecord::Migration[5.0]
  def up
    remove_column "admin_users", "hashed_password"
    add_column "admin_users", "password_digest", :string
  end

  def down
    remove_column "admin_users", "password_digest"
    add_column "admin_users", "hashed_password", :string, :limit => 40
  end
end

类addPasswordDigestUsers40 结束 结束

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我怀疑迁移没有正确执行。您可以尝试通过执行rake db:drop db:create db:migrate来重置数据库。这将删除数据库并创建一个新的数据库。看起来您只需要运行

rails db:migrate

Mysql2:：错误：表“blog\u development.admin\u users”不存在：ALTER Table

admin\u users

drop

hash_密码

没有帮助。ActiveRecord:：NoenEnvironmentInSchemaError:在架构中找不到环境数据。请尝试运行

rails db:Environment:set rails_ENV={{{{whatever}}

在每个命令之前，他们说“rails中止”，您能粘贴完整的回溯吗？rails中止！不知道如何构建任务“db:environment:set”（请参阅--tasks）/home/artem/.rvm/gems/ruby-2.3.1/gems/railties-5.0.2/lib/rails/commands/rake_proxy.rb:14:in

block in run_rake_task'/home/artem/.rvm/gems/gems/ruby-2.3.1/gems/railties-5.0.2/lib/rails/commands/rake_proxy.rb:11:in

run__-rake_-task'/home/artem/.rvm/gems/rake/ruby-2.3.1/rake-5/rake-5.rb:51/rake/rake/rake/rake/rake-s

运行_命令！'/home/artem/.rvm/gems/ruby-2.3.1/gems/railties-5.0.2/lib/rails/commands.rb:18:in

”/home/artem/ROR/blog/bin/rails:9:in“require”