Ruby-on-rails 迁移待定；运行“bin/rake db:migrate RAILS_ENV=development”来解决这个问题[无法继续]
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Migrations are pending; run 'bin/rake db:migrate RAILS_ENV=development' to resolve this issue [unable to proceed]
提问by user3010587
I appear to have a circular issue in regards to Ruby on Rails migration procedure. I am following the introduction article and I have reached the point when I need to create my first table.
我似乎有一个关于 Ruby on Rails 迁移过程的循环问题。我正在关注介绍文章，并且已经到了需要创建第一个表的地步。
I have ran the following,
我已经运行了以下，
[tims@web2 working_ror]# rails generate model Homepage first_name:string last_name:string email:string message:text
invoke active_record
create db/migrate/20131119203948_create_homepages.rb
create app/models/homepage.rb
invoke test_unit
createtest /models/homepage_test.rb
createtest /fixtures/homepages.yml
I then proceeded with the migration,
然后我继续迁移，
[tims@web2 working_ror]# rake db:migrate
== CreateHomepages: migrating ================================================
-- create_table(:homepages)
-> 0.0493s
== CreateHomepages: migrated (0.0494s) =======================================
, however, when I run my application I see the following message,
，但是，当我运行我的应用程序时，我看到以下消息，
Migrations are pending; run 'bin/rake db:migrate RAILS_ENV=development' to resolve this issue.
but, IF I run the above,
但是，如果我运行上面的，
[tims@web2 working_ror]# rake db:migrate RAILS_ENV=development
[tims@web2 working_ror]#
and the message continues ...
消息还在继续……
I have spent considerable amount of time researching forums in-which the closest I could find was to drop and re-build everything, which have done the following.
我花了大量时间研究论坛——我能找到的最接近的是删除并重新构建所有内容，这些论坛做了以下工作。
rake db:drop rake db:create rake db:migrate
耙数据库：删除耙数据库：创建耙数据库：迁移
and the results are the same.
结果是一样的。
回答by igaurav
You need to do
你需要做
bundle exec rake test:prepare
or
或者
bundle exec rake db:test:prepare
and then
进而
bundle exec rake db:migrate
before running the specs
在运行规范之前
Cheers
干杯
cited from : Why am I asked to run 'rake db:migrate RAILS_ENV=test'?
回答by Ahmed Ali
you can do
你可以做
bundle exec rake test:prepare
In Rails 4.1+, they deprecated db:test:prepare You can now just use:
在 Rails 4.1+ 中，他们弃用了 db:test:prepare 你现在可以使用：
ActiveRecord::Migration.maintain_test_schema!
If you need to do it manually
如果您需要手动执行
rake db:schema:load RAILS_ENV=test
and then
进而
bundle exec rake db:migrate
回答by Fábio Mendon?a
try In RAILS_ROOT/config/environments/development.rb Set the following setting to false:
尝试在 RAILS_ROOT/config/environments/development.rb 中将以下设置设置为 false：
config.active_record.migration_error = false#:page_load
config.active_record.migration_error = false#:page_load
回答by fylooi
One weird trick that you can use when your migrations are screwed (file deleted, manually renamed, etc.)
当您的迁移被搞砸（文件删除、手动重命名等）时，您可以使用一种奇怪的技巧
- Fire up your favourite DB admin tool (eg. PGAdmin3) and browse to the database in question.
- Look for a table called
schema_migrationsand browse its content. It should have a single column calledversion. This field is used by Rails to check whether migrations are up to date. - Make sure that your migration timestamps corresponds with the data in this column. If you have deleted an older migration, delete the corresponding timestamp.
- 启动您最喜欢的数据库管理工具（例如 PGAdmin3）并浏览到有问题的数据库。
- 查找名为的表
schema_migrations并浏览其内容。它应该有一个名为version. Rails 使用此字段来检查迁移是否是最新的。 - 确保您的迁移时间戳与此列中的数据一致。如果您删除了较旧的迁移，请删除相应的时间戳。
回答by t34mrh0
Check to make sure that table doesn't already exist:
检查以确保该表不存在：
- type - rails dbconsole
- type - .tables (check to see if there was an error during the rake db:migrate that has the table name like -- create_table(:test) rake aborted!)
- If you see the table name after running the .tables in the console type -
drop table TABLENAME; - Then .quit to go back to the branch and run the rake db:migrate command again.
- 类型 - rails dbconsole
- 输入 - .tables（检查 rake db:migrate 期间是否有错误，表名类似于 -- create_table(:test) rake aborted!）
- 如果在控制台类型中运行 .tables 后看到表名 -
drop table TABLENAME; - 然后 .quit 返回分支并再次运行 rake db:migrate 命令。
回答by Jeremiah Adelaja
this was what i did:
这就是我所做的：
rails db:environment:set RAILS_ENV=test
If you need to do it manually
如果您需要手动执行
rake db:schema:load RAILS_ENV=test
and then
进而
bundle exec rake db:migrate
Thanks to Ahmed Ali....... your comment was helpful.
感谢艾哈迈德·阿里......你的评论很有帮助。
