奇数耙 db:migrate 输出

Question

为什么 rake db:migrate 运行 Execute db:schema:dump 我的输出全搞砸了（显示 SQL）。

看起来像这样：

  ActiveRecord::SchemaMigration Load (0.5ms)  SELECT "schema_migrations".* FROM "schema_migrations"
   (3.7ms)  SELECT t2.oid::regclass::text AS to_table, a1.attname AS column, a2.attname AS primary_key, c.conname AS name, c.confupdtype AS on_update, c.confdeltype AS on_delete
FROM pg_constraint c
JOIN pg_class t1 ON c.conrelid = t1.oid
JOIN pg_class t2 ON c.confrelid = t2.oid
JOIN pg_attribute a1 ON a1.attnum = c.conkey[1] AND a1.attrelid = t1.oid
JOIN pg_attribute a2 ON a2.attnum = c.confkey[1] AND a2.attrelid = t2.oid
JOIN pg_namespace t3 ON c.connamespace = t3.oid
WHERE c.contype = 'f'
  AND t1.relname = 'accounts'
  AND t3.nspname = ANY (current_schemas(false))
ORDER BY c.conname

   (3.2ms)  SELECT t2.oid::regclass::text AS to_table, a1.attname AS column, a2.attname AS primary_key, c.conname AS name, c.confupdtype AS on_update, c.confdeltype AS on_delete
FROM pg_constraint c
JOIN pg_class t1 ON c.conrelid = t1.oid
JOIN pg_class t2 ON c.confrelid = t2.oid
JOIN pg_attribute a1 ON a1.attnum = c.conkey[1] AND a1.attrelid = t1.oid
JOIN pg_attribute a2 ON a2.attnum = c.confkey[1] AND a2.attrelid = t2.oid
JOIN pg_namespace t3 ON c.connamespace = t3.oid
WHERE c.contype = 'f'
  AND t1.relname = 'deliveries'
  AND t3.nspname = ANY (current_schemas(false))
ORDER BY c.conname

   (3.2ms)  SELECT t2.oid::regclass::text AS to_table, a1.attname AS column, a2.attname AS primary_key, c.conname AS name, c.confupdtype AS on_update, c.confdeltype AS on_delete
FROM pg_constraint c
JOIN pg_class t1 ON c.conrelid = t1.oid
JOIN pg_class t2 ON c.confrelid = t2.oid
JOIN pg_attribute a1 ON a1.attnum = c.conkey[1] AND a1.attrelid = t1.oid
JOIN pg_attribute a2 ON a2.attnum = c.confkey[1] AND a2.attrelid = t2.oid
JOIN pg_namespace t3 ON c.connamespace = t3.oid
WHERE c.contype = 'f'
  AND t1.relname = 'posts'
  AND t3.nspname = ANY (current_schemas(false))
ORDER BY c.conname

跟踪显示：

** Invoke db:migrate (first_time)
** Invoke environment (first_time)
** Execute environment
** Invoke db:load_config (first_time)
** Execute db:load_config
** Execute db:migrate
** Invoke db:_dump (first_time)
** Execute db:_dump
** Invoke db:schema:dump (first_time)
** Invoke environment 
** Invoke db:load_config 
** Execute db:schema:dump

这是在将 rails 4.1.6 升级到 rails 4.2.0 后启动的。

为什么会这样？

Answer 1

升级到 Rails 4.2.1 后，我遇到了同样的问题，阻止我通过 Codeship 进行迁移部署，它期望来自 rake db:migrate 的非常特殊的输出认为推送成功。

在 config/environments/production.rb 中设置 config.log_level = :info 解决了我的问题，大概是因为 :debug 级别的日志级别太冗长了。

Answer 2

我得到这个奇怪的神秘 SQL' 输出的原因是因为我的 gem 文件中有 Heroku 的 rails_12factor gem 而不是分组到 :production .

解决方案是：

group :production do
  gem 'rails_12factor'
end

和运行bundle

Answer 3

This discussion 为我解决了 "odd" 输出：
只需在您的环境配置中将 dump_schema_after_migration 设置为 false，如下所示：

/config/environments/development.rb

Application.configure do
  ...
  dump_schema_after_migration = false
  ...
end

编辑
在大多数情况下，这不是您想要做的，因为您需要在版本控制中包含 schema.rb。

奇数耙 db:migrate 输出

Odd rake db:migrate output

ruby

rake

ruby-on-rails

rails-activerecord