{"id":14229,"date":"2021-08-01T08:08:09","date_gmt":"1970-01-01T00:00:00","guid":{"rendered":"http:\/\/www.sejuku.net\/blog\/?p=14229"},"modified":"2024-05-06T11:40:04","modified_gmt":"2024-05-06T02:40:04","slug":"rails-migration%e5%ae%8c%e5%85%a8%e8%a7%a3%e8%aa%ac%ef%bc%81%e5%9f%ba%e7%a4%8e%e3%81%ae%e5%9f%ba%e7%a4%8e%e3%81%8b%e3%82%89%e7%90%86%e8%a7%a3%ef%bc%81","status":"publish","type":"post","link":"https:\/\/www.sejuku.net\/blog\/14229","title":{"rendered":"\u3010Rails\u5165\u9580\u3011\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3092\u8a2d\u5b9a\u3059\u308brails db:migrate\u3092\u8aac\u660e\uff01"},"content":{"rendered":"

Ruby on Rails<\/strong><\/span>\uff08\u4ee5\u964d\u3001rails<\/strong><\/span>\uff09\u3067Web\u30a2\u30d7\u30ea\u3092\u958b\u767a\u3057\u3066\u3044\u308b\u3068\u3001bin\/rails db:migrate<\/strong><\/span>\u30b3\u30de\u30f3\u30c9\u3092\u3088\u304f\u4f7f\u3044\u307e\u3059\u3002<\/p>\n

\u3057\u304b\u3057<\/p>\n

\u30fb\u305d\u3082\u305d\u3082migration<\/strong><\/span>\u3063\u3066\uff1f
\n\u30fb\u4f7f\u3044\u65b9\u304c\u3044\u307e\u3044\u3061\u5206\u304b\u3089\u306a\u3044…
\n\u30fb\u306a\u3093\u306e\u305f\u3081\u306b\u3042\u308b\u306e\uff1f
\n\u30fb\u30ed\u30fc\u30eb\u30d0\u30c3\u30af\uff08rollback<\/strong><\/span>\uff09\u3068\u30c0\u30a6\u30f3\uff08down<\/strong><\/span>\uff09\u306e\u9055\u3044\u304c\u7406\u89e3\u3067\u304d\u306a\u3044…\n<\/div>\n

\u306a\u3069\u3001\u69d8\u3005\u306a\u7591\u554f\u3084\u4e0d\u5b89\u3092\u62b1\u3048\u306a\u304c\u3089\u4f7f\u3063\u3066\u3044\u308b\u65b9\u3082\u3044\u3089\u3063\u3057\u3083\u308b\u3068\u601d\u3044\u307e\u3059\uff01<\/p>\n

\u305d\u3053\u3067\u4eca\u56de\u306f\u3001\u4ee5\u4e0b\u306e\u5185\u5bb9\u306b\u3064\u3044\u3066\u3001\u5b9f\u4f8b\u3092\u4ea4\u3048\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n

\u30fbmigration\u3068\u306f
\n\u30fbmigration\u306e\u30e1\u30ea\u30c3\u30c8\u3068\u306f
\n\u30fbbin\/rails db:migrate\u30b3\u30de\u30f3\u30c9\u306e\u95a2\u9023\u30b3\u30de\u30f3\u30c9\u306e\u4f7f\u3044\u65b9\n<\/div>\n

\u305d\u308c\u3067\u306f\u884c\u3063\u3066\u307f\u307e\u3057\u3087\u3046\uff01<\/p>\n

migration\u3068\u306f<\/h2>\n

migration<\/strong><\/span>\uff08bin\/rails db:migrate<\/strong><\/span>\u30b3\u30de\u30f3\u30c9\uff09\u306f\u3001rails\u3067\u4f7f\u7528\u3059\u308b\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u69cb\u9020\uff08\u30c6\u30fc\u30d6\u30eb\u3001\u30ab\u30e9\u30e0\uff09\u3092\u5909\u66f4\u3059\u308b\u3068\u304d\u306b\u5229\u7528\u3059\u308b\u6a5f\u80fd\u3067\u3059\u3002<\/strong><\/span><\/p>\n

migration\u306e\u5927\u307e\u304b\u306a\u6d41\u308c\u306f\u4ee5\u4e0b\u306e\u3068\u304a\u308a\u3067\u3059\u3002<\/p>\n

\uff081\uff09migration\u30d5\u30a1\u30a4\u30eb<\/strong><\/span>\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002<\/p>\n

\uff082\uff09bin\/rails db:migrate<\/strong><\/span>\u30b3\u30de\u30f3\u30c9\u3092\u5b9f\u884c\u3057\u307e\u3059\u3002<\/p>\n

\u3053\u306e2\u3064\u306e\u624b\u9806\u3092\u884c\u3046\u3068\u3001migration\u30d5\u30a1\u30a4\u30eb\u3067\u6307\u5b9a\u3057\u305f\u3068\u304a\u308a\u306b\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u69cb\u9020\u304c\u5909\u66f4\u3055\u308c\u307e\u3059\u3002<\/strong><\/span><\/p>\n

migration\u306e\u30e1\u30ea\u30c3\u30c8\u3068\u306f<\/h3>\n

migration\u3092\u5229\u7528\u3057\u3066\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u69cb\u9020\u3092\u5909\u66f4\u3059\u308b\u3068\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30e1\u30ea\u30c3\u30c8\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n

\u30fbSQL\u6587\u3092\u66f8\u304b\u305a\u306b\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u69cb\u9020\u3092\u5909\u66f4\u3067\u304d\u308b
\n\u30fbmigration\u30d5\u30a1\u30a4\u30eb\u3092\u5171\u6709\u3059\u308b\u3053\u3068\u3067\u3001\u8907\u6570\u306e\u958b\u767a\u74b0\u5883\u3067\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u69cb\u9020\u3092\u7c21\u5358\u306b\u5171\u6709\u3067\u304d\u308b
\n\u30fbbin\/rails db:migrate:status<\/strong><\/span>\u30b3\u30de\u30f3\u30c9\u3067\u3001migration\u30d5\u30a1\u30a4\u30eb\u306e\u9069\u7528\u72b6\u6cc1\u3092\u78ba\u8a8d\u3067\u304d\u308b
\n\u30fbbin\/rails db:rollback<\/strong><\/span>\u30b3\u30de\u30f3\u30c9\u3067\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u69cb\u9020\u3092\u5c11\u3057\u524d\u306e\u72b6\u614b\u306b\u623b\u305b\u308b\n<\/div>\n

migration\u3092\u7406\u89e3\u3059\u308b\u305f\u3081\u306brails\u306e\u958b\u767a\u74b0\u5883\u3092\u4f5c\u6210\u3059\u308b<\/h2>\n

migration\u306e\u52d5\u4f5c\u3092\u7406\u89e3\u3059\u308b\u305f\u3081\u306b\u3001rails\u306e\u958b\u767a\u74b0\u5883\u3092\u69cb\u7bc9\u3057\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n

rails\u306e\u958b\u767a\u74b0\u5883\u306e\u69cb\u7bc9\u65b9\u6cd5\u306f\u3001\u4ee5\u4e0b\u306e\u8a18\u4e8b\u3067\u89e3\u8aac\u3057\u3066\u3044\u307e\u3059\u306e\u3067\u3001\u305c\u3072\u3054\u89a7\u304f\u3060\u3055\u3044\u3002<\/p>\n \n

\n
\n
\n \n <\/div>\n
\n
\u521d\u5fc3\u8005\u3067\u3082\u304b\u3093\u305f\u3093\uff01Ruby on Rails \u306e\u958b\u767a\u74b0\u5883\u306e\u69cb\u7bc9\u624b\u9806\uff08Mac\/Windows \u4e21\u5bfe\u5fdc\uff09<\/div>\n
\u66f4\u65b0\u65e5\uff1a2024\u5e745\u67086\u65e5<\/div>\n <\/div>\n <\/div>\n <\/div>\n <\/a>\n \n

\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001app\/samurai\/migrate-demo<\/strong><\/span>\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u3092\u4f5c\u6210\u3057\u3066\u958b\u767a\u74b0\u5883\u3092\u69cb\u7bc9\u3057\u305f\u5834\u5408\u3092\u4f8b\u306b\u3001\u8aac\u660e\u3092\u7d9a\u3051\u307e\u3059\u3002<\/p>\n

migration\u30d5\u30a1\u30a4\u30eb\u3092\u4f5c\u6210\u3059\u308b<\/h2>\n

migration\u30d5\u30a1\u30a4\u30eb\u306e\u4f5c\u6210\u65b9\u6cd5\u306b\u3064\u3044\u3066\u306f\u3001\u4ee5\u4e0b\u306e\u8a18\u4e8b\u3067\u8a73\u3057\u304f\u8aac\u660e\u3057\u3066\u3044\u307e\u3059\u306e\u3067\u3001\u305c\u3072\u3054\u89a7\u304f\u3060\u3055\u3044\uff01<\/p>\n \n

\n
\n
\n \n <\/div>\n
\n
\u3010Rails\u5165\u9580\u3011generate migration\u30b3\u30de\u30f3\u30c9\u306e\u5206\u304b\u308a\u3084\u3059\u3044\u307e\u3068\u3081<\/div>\n
\u66f4\u65b0\u65e5\uff1a2024\u5e745\u67086\u65e5<\/div>\n <\/div>\n <\/div>\n <\/div>\n <\/a>\n \n

\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001\u4ee5\u4e0b\u306e\u30b3\u30de\u30f3\u30c9\u3092\u5b9f\u884c\u3057\u30665\u3064\u306emigration\u30d5\u30a1\u30a4\u30eb\u3092\u4f5c\u6210\u3057\u305f\u5834\u5408\u3092\u4f8b\u306b\u3001\u8aac\u660e\u3092\u7d9a\u3051\u307e\u3059\u3002<\/p>\n

bin\/rails generate migration CreateSample name:string\r\nbin\/rails generate migration AddStringColToSample\r\nbin\/rails generate migration RenameFromStringColToAddressOnSample\r\nbin\/rails generate migration RemoveAddressFromSample\r\nbin\/rails generate migration AddIntegerColToSample<\/pre>\n
\u4e0a\u8a18\u306e\u30b3\u30de\u30f3\u30c9\u3067\u4f5c\u6210\u3055\u308c\u305f5\u3064\u306emigration\u30d5\u30a1\u30a4\u30eb\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u7de8\u96c6\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n
db\/migrate\/20180704015653_create_sample.rb<\/h4>\n<\/h4>\n
sample\u30c6\u30fc\u30d6\u30eb\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002<\/p>\n
class CreateSample < ActiveRecord::Migration[5.1]\r\n  def change\r\n    create_table :samples do |t|\r\n      t.string :name\r\n    end\r\n  end\r\nend<\/pre>\n
\u203b\u3053\u306e\u30d5\u30a1\u30a4\u30eb\u306f\u5909\u66f4\u3057\u307e\u305b\u3093\u3002<\/strong><\/span><\/p>\n
db\/migrate\/20180704015654_add_string_col_to_sample.rb<\/h4>\n
string_col\u30ab\u30e9\u30e0\u3092\u8ffd\u52a0\u3057\u307e\u3059\u3002<\/p>\n
class AddStringColToSample < ActiveRecord::Migration[5.1]\r\n  def change\r\n    add_column :samples, :string_col, :string\r\n  end\r\nend<\/pre>\n
db\/migrate\/20180704015655_rename_from_string_col_to_address_on_sample.rb<\/h4>\n
string_col\u30ab\u30e9\u30e0\u306e\u540d\u524d\u3092\u3001address\u30ab\u30e9\u30e0\u306b\u5909\u66f4\u3057\u307e\u3059\u3002<\/p>\n
class RenameFromStringColToAddressOnSample < ActiveRecord::Migration[5.1]\r\n  def change\r\n    rename_column :samples, :string_col, :address\r\n  end\r\nend<\/pre>\n
db\/migrate\/20180704015656_remove_address_from_sample.rb<\/h4>\n
address\u30ab\u30e9\u30e0\u3092\u524a\u9664\u3057\u307e\u3059\u3002<\/p>\n
class RemoveAddressFromSample < ActiveRecord::Migration[5.1]\r\n  def down\r\n    add_column :samples, :address, :string\r\n  end\r\n  def up\r\n    remove_column :samples, :address\r\n  end\r\nend<\/pre>\n
db\/migrate\/20180704020017_add_integer_col_to_sample.rb<\/h4>\n
integer_col\u30ab\u30e9\u30e0\u3092\u8ffd\u52a0\u3057\u307e\u3059\u3002<\/p>\n
class AddIntegerColToSample < ActiveRecord::Migration[5.1]\r\n  def change\r\n    add_column :samples, :integer_col, :integer\r\n  end\r\nend<\/pre>\n
migration\u30d5\u30a1\u30a4\u30eb\u3092\u5b9f\u884c\u3059\u308b\uff08migrate\uff09<\/h2>\n
\u4f5c\u6210\u3057\u305fmigration\u30d5\u30a1\u30a4\u30eb\u3092\u5b9f\u884c\u3057\u307e\u3059\u304c\u3001\u305d\u306e\u524d\u306b\u3001\u3053\u306e\u6642\u70b9\u3067\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\uff08\u30c6\u30fc\u30d6\u30eb\uff09\u304c\u4f5c\u6210\u3055\u308c\u3066\u3044\u306a\u3044\u3053\u3068\u3092\u78ba\u8a8d<\/strong><\/span>\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n
\uff081\uff09\u4ee5\u4e0b\u306e\u30b3\u30de\u30f3\u30c9\u30921\u884c\u305a\u3064\u9806\u756a\u306b\u5165\u529b\u3057\u307e\u3059\u3002<\/p>\n
bin\/rails dbconsole\r\n.tables<\/pre>\n
\u5b9f\u884c\u7d50\u679c\uff1a
\n\u8868\u793a\u306a\u3057<\/strong><\/span><\/p>\n
\u6b21\u306b\u3001\u3059\u3079\u3066\u306emigration\u30d5\u30a1\u30a4\u30eb\u3092\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u53cd\u6620\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n
\uff082\uff09\u4ee5\u4e0b\u306e\u30b3\u30de\u30f3\u30c9\u30921\u884c\u305a\u3064\u9806\u756a\u306b\u5165\u529b\u3057\u307e\u3059\u3002<\/p>\n
.exit\r\nbin\/rails db:migrate<\/pre>\n
\u5b9f\u884c\u7d50\u679c\uff1a<\/p>\n
== 20180704015653 CreateSample: migrating =====================================\r\n-- create_table(:samples)\r\n   -> 0.0041s\r\n== 20180704015653 CreateSample: migrated (0.0042s) ============================\r\n\r\n== 20180704015654 AddStringColToSample: migrating =============================\r\n-- add_column(:samples, :string_col, :string)\r\n   -> 0.0011s\r\n== 20180704015654 AddStringColToSample: migrated (0.0012s) ====================\r\n\r\n== 20180704015655 RenameFromStringColToAddressOnSample: migrating =============\r\n-- rename_column(:samples, :string_col, :address)\r\n   -> 0.0057s\r\n== 20180704015655 RenameFromStringColToAddressOnSample: migrated (0.0059s) ====\r\n\r\n== 20180704015656 RemoveAddressFromSample: migrating ==========================\r\n-- remove_column(:samples, :address)\r\n   -> 0.0054s\r\n== 20180704015656 RemoveAddressFromSample: migrated (0.0057s) =================\r\n\r\n== 20180704020017 AddIntegerColToSample: migrating ============================\r\n-- add_column(:samples, :integer_col, :integer)\r\n   -> 0.0009s\r\n== 20180704020017 AddIntegerColToSample: migrated (0.0010s) ===================<\/pre>\n
\u3059\u3079\u3066\u306emigration\u30d5\u30a1\u30a4\u30eb\u304c\u5b9f\u884c\u3055\u308c\u307e\u3059\u3002<\/p>\n
\u3053\u306e\u6642\u70b9\u3067\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\uff08\u30c6\u30fc\u30d6\u30eb\uff09\u304c\u4f5c\u6210\u3055\u308c\u3066\u3044\u308b\u3053\u3068<\/strong><\/span>\u3068\u3001\u30c6\u30fc\u30d6\u30eb\u306e\u30ab\u30e9\u30e0\u60c5\u5831<\/strong><\/span>\u3092\u78ba\u8a8d\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n
\uff083\uff09\u4ee5\u4e0b\u306e\u30b3\u30de\u30f3\u30c9\u30921\u884c\u305a\u3064\u9806\u756a\u306b\u5165\u529b\u3057\u307e\u3059\u3002<\/p>\n
bin\/rails dbconsole\r\n.tables<\/pre>\n
\u5b9f\u884c\u7d50\u679c\uff1a<\/p>\n
ar_internal_metadata  samples               schema_migrations<\/pre>\n
\uff084\uff09\u4ee5\u4e0b\u306e\u30b3\u30de\u30f3\u30c9\u3092\u5165\u529b\u3057\u307e\u3059\u3002<\/p>\n
PRAGMA TABLE_INFO(samples);<\/pre>\n
\u5b9f\u884c\u7d50\u679c\uff1a<\/p>\n
0|id|integer|1||1\r\n1|name|varchar|0|NULL|0\r\n2|integer_col|integer|0||0<\/pre>\n
\u3053\u308c\u304c\u3059\u3079\u3066\u306emigration\u30d5\u30a1\u30a4\u30eb\u3092\u5b9f\u884c\u3057\u305f\u5834\u5408\u306e\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u69cb\u9020\u3067\u3059\u3002<\/p>\n
\uff085\uff09\u4ee5\u4e0b\u306e\u30b3\u30de\u30f3\u30c9\u3092\u5165\u529b\u3057\u307e\u3059\u3002<\/p>\n
.exit<\/pre>\n
migration\u30d5\u30a1\u30a4\u30eb\u3092\u9014\u4e2d\u307e\u3067\u53cd\u6620\u3059\u308b\uff08VERSION\uff09<\/h3>\n
\u4e0a\u306e\u624b\u9806\u3067\u306f\u3001\u3059\u3079\u3066\u306emigration\u30d5\u30a1\u30a4\u30eb\u304c\u53cd\u6620\u3055\u308c\u307e\u3057\u305f\u3002<\/p>\n
\u3053\u3053\u3067\u306f\u3001\uff08\u3059\u3079\u3066\u306emigration\u30d5\u30a1\u30a4\u30eb\u3067\u306f\u306a\u304f\uff09\u9014\u4e2d\u306emigration\u30d5\u30a1\u30a4\u30eb\u307e\u3067\u306b\u9650\u5b9a\u3057\u3066\u53cd\u6620\u3059\u308b<\/strong><\/span>\u65b9\u6cd5\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n
bin\/rake db:migrate\u30b3\u30de\u30f3\u30c9\u306b\u3001\u300cVERSION=20180704015655\u300d\u30aa\u30d7\u30b7\u30e7\u30f3\u3092\u6307\u5b9a\u3057\u3066\u5b9f\u884c\u3057\u307e\u3059\u3002<\/p>\n
\u307e\u305a\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u300cVERSION=0\u300d<\/strong><\/span>\u3092\u6307\u5b9a\u3057\u3066\u3001\u3044\u3063\u305f\u3093\u3001\u3059\u3079\u3066\u306emigration\u30d5\u30a1\u30a4\u30eb\u3092\u672a\u53cd\u6620\u306e\u72b6\u614b\u306b\u623b\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n
\uff081\uff09\u4ee5\u4e0b\u306e\u30b3\u30de\u30f3\u30c9\u3092\u5165\u529b\u3057\u307e\u3059\u3002<\/p>\n
bin\/rake db:migrate VERSION=0<\/pre>\n
\u5b9f\u884c\u7d50\u679c\uff1a<\/p>\n
Running via Spring preloader in process 5831\r\n== 20180704020017 AddIntegerColToSample: reverting ============================\r\n-- remove_column(:samples, :integer_col, :integer)\r\n   -> 0.0052s\r\n== 20180704020017 AddIntegerColToSample: reverted (0.0093s) ===================\r\n\r\n== 20180704015656 RemoveAddressFromSample: reverting ==========================\r\n-- add_column(:samples, :address, :string)\r\n   -> 0.0003s\r\n== 20180704015656 RemoveAddressFromSample: reverted (0.0004s) =================\r\n\r\n== 20180704015655 RenameFromStringColToAddressOnSample: reverting =============\r\n-- rename_column(:samples, :address, :string_col)\r\n   -> 0.0072s\r\n== 20180704015655 RenameFromStringColToAddressOnSample: reverted (0.0073s) ====\r\n\r\n== 20180704015654 AddStringColToSample: reverting =============================\r\n-- remove_column(:samples, :string_col, :string)\r\n   -> 0.0084s\r\n== 20180704015654 AddStringColToSample: reverted (0.0085s) ====================\r\n\r\n== 20180704015653 CreateSample: reverting =====================================\r\n-- drop_table(:samples)\r\n   -> 0.0014s\r\n== 20180704015653 CreateSample: reverted (0.0016s) ============================<\/pre>\n
\u6b21\u306b\u300120180704015655<\/strong><\/span>\uff08db\/migrate\/20180704015655_rename_from_string_col_to_address_on_sample.rb\uff1astring_col<\/strong><\/span>\u30ab\u30e9\u30e0\u306e\u540d\u524d\u3092address<\/strong><\/span>\u30ab\u30e9\u30e0\u306b\u5909\u66f4\u3059\u308b\uff09\u307e\u3067\u306emigration\u30d5\u30a1\u30a4\u30eb\u3092\u53cd\u6620\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n
\uff082\uff09\u4ee5\u4e0b\u306e\u30b3\u30de\u30f3\u30c9\u3092\u5165\u529b\u3057\u307e\u3059\u3002<\/p>\n
bin\/rake db:migrate VERSION=20180704015655<\/pre>\n
\u5b9f\u884c\u7d50\u679c\uff1a<\/p>\n
Running via Spring preloader in process 5952\r\n== 20180704015653 CreateSample: migrating =====================================\r\n-- create_table(:samples)\r\n   -> 0.0016s\r\n== 20180704015653 CreateSample: migrated (0.0017s) ============================\r\n\r\n== 20180704015654 AddStringColToSample: migrating =============================\r\n-- add_column(:samples, :string_col, :string)\r\n   -> 0.0004s\r\n== 20180704015654 AddStringColToSample: migrated (0.0005s) ====================\r\n\r\n== 20180704015655 RenameFromStringColToAddressOnSample: migrating =============\r\n-- rename_column(:samples, :string_col, :address)\r\n   -> 0.0058s\r\n== 20180704015655 RenameFromStringColToAddressOnSample: migrated (0.0074s) ====<\/pre>\n
\u3053\u308c\u3067\u300120180704015655\u307e\u3067\u306emigration\u30d5\u30a1\u30a4\u30eb\u304c\u53cd\u6620\u3055\u308c\u307e\u3057\u305f\u3002<\/p>\n
samples\u30c6\u30fc\u30d6\u30eb\u306baddress\u30ab\u30e9\u30e0\u304c\u4f5c\u6210\u3055\u308c\u3066\u3044\u308b\u306f\u305a\u3067\u3059\u3002<\/p>\n
\u30c6\u30fc\u30d6\u30eb\u306e\u30ab\u30e9\u30e0\u60c5\u5831\u3092\u78ba\u8a8d\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n
\uff083\uff09\u4ee5\u4e0b\u306e\u30b3\u30de\u30f3\u30c9\u30921\u884c\u305a\u3064\u9806\u756a\u306b\u5165\u529b\u3057\u307e\u3059\u3002<\/p>\n
bin\/rails dbconsole\r\nPRAGMA TABLE_INFO(samples);<\/pre>\n
\u5b9f\u884c\u7d50\u679c\uff1a<\/p>\n
0|id|integer|1||1\r\n1|name|varchar|0|NULL|0\r\n2|address|varchar|0|NULL|0<\/pre>\n
\u78ba\u304b\u306binteger_col\u30ab\u30e9\u30e0\u3067\u306f\u306a\u304f\u3001address\u30ab\u30e9\u30e0\u304c\u3042\u308a\u307e\u3059\u306d\u3002<\/p>\n
\uff085\uff09\u4ee5\u4e0b\u306e\u30b3\u30de\u30f3\u30c9\u3092\u5165\u529b\u3057\u307e\u3059\u3002<\/p>\n
.exit<\/pre>\n
\u74b0\u5883\u3092\u6307\u5b9a\u3057\u3066\u5b9f\u884c\u3059\u308b\uff08RAILS_ENV\uff09<\/h3>\n
rails\u3067\u306f\u3001config\/database.yml<\/strong><\/span>\u3067\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u74b0\u5883\u3092\u8a2d\u5b9a\u3067\u304d\u307e\u3059\u3002<\/p>\n
\u3053\u3053\u307e\u3067\u306b\u8aac\u660e\u3057\u305fbin\/rails db:migrate\u30b3\u30de\u30f3\u30c9\u3092\u5b9f\u884c\u3059\u308b\u3068\u3001development\u74b0\u5883<\/strong><\/span>\uff08db\/development.sqlite3\uff09\u306b\u5bfe\u3057\u3066migration\u30d5\u30a1\u30a4\u30eb\u304c\u5b9f\u884c\u3055\u308c\u307e\u3059\u3002<\/p>\n
RAILS_ENV\u30aa\u30d7\u30b7\u30e7\u30f3\u3092\u6307\u5b9a\u3059\u308b\u3068\u3001test\u74b0\u5883<\/strong><\/span>\uff08db\/test.sqlite3\uff09\u3084production\u74b0\u5883<\/strong><\/span>\uff08db\/production.sqlite3\uff09\u306b\u5bfe\u3057\u3066migration\u30d5\u30a1\u30a4\u30eb\u3092\u5b9f\u884c\u3067\u304d\u307e\u3059\u3002<\/p>\n
test\u74b0\u5883\u306b\u5bfe\u3057\u3066\u5b9f\u884c\u3059\u308b\u5834\u5408\uff1a<\/p>\n
bin\/rails db:migrate RAILS_ENV=test<\/pre>\n
production\u74b0\u5883\u306b\u5bfe\u3057\u3066\u5b9f\u884c\u3059\u308b\u5834\u5408\uff1a<\/p>\n
bin\/rails db:migrate RAILS_ENV=production<\/pre>\n
migration\u30d5\u30a1\u30a4\u30eb\u306e\u9069\u7528\u72b6\u614b\u3092\u78ba\u8a8d\u3059\u308b\uff08status\uff09<\/h2>\n
\u6b21\u306b\u3001migration\u30d5\u30a1\u30a4\u30eb\u306e\u9069\u7528\u72b6\u614b\u3092\u78ba\u8a8d\u3059\u308b\u65b9\u6cd5\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n
\u3053\u3053\u307e\u3067\u306e\u624b\u9806\u3092\u9806\u756a\u306b\u884c\u3063\u3066\u3044\u308c\u3070\u300120180704015655\u307e\u3067\u306emigration\u30d5\u30a1\u30a4\u30eb\u304c\u5b9f\u884c\u3055\u308c\u3066\u3044\u308b<\/strong><\/span>\u30cf\u30ba\u3067\u3059\u3002<\/p>\n
\u4ee5\u4e0b\u306e\u30b3\u30de\u30f3\u30c9\u3092\u5165\u529b\u3057\u3066\u3001\u78ba\u8a8d\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n
bin\/rake db:migrate:status<\/pre>\n
\u5b9f\u884c\u7d50\u679c\uff1a<\/p>\n
Running via Spring preloader in process 6564\r\n\r\ndatabase: \/home\/yazaki-mint\/app\/samurai\/migrate-demo\/db\/development.sqlite3\r\n\r\n Status   Migration ID    Migration Name\r\n--------------------------------------------------\r\n   up     20180704015653  Create sample\r\n   up     20180704015654  Add string col to sample\r\n   up     20180704015655  Rename from string col to address on sample\r\n  down    20180704015656  Remove address from sample\r\n  down    20180704020017  Add integer col to sample<\/pre>\n
Status\u6b04\u306b\u300cup\u300d<\/strong><\/span>\u3068\u8868\u793a\u3055\u308c\u3066\u3044\u308bmigration\u30d5\u30a1\u30a4\u30eb\u306f\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u9069\u7528\u6e08\u307f\u3067\u3059\u3002<\/p>\n
\u4e00\u65b9\u3001Status\u6b04\u306b\u300cdown\u300d<\/strong><\/span>\u3068\u8868\u793a\u3055\u308c\u3066\u3044\u308bmigration\u30d5\u30a1\u30a4\u30eb\u306f\u9069\u7528\u3055\u308c\u3066\u3044\u307e\u305b\u3093\u3002<\/p>\n
\u3057\u305f\u304c\u3063\u3066\u3001\u4e0a\u306e\u5b9f\u884c\u7d50\u679c\u3067\u306f\u30015\u3064\u306emigration\u30d5\u30a1\u30a4\u30eb\u306e\u3046\u30613\u3064\u76ee\uff08Migration ID\uff1a20180704015655\uff09\u307e\u3067\u304c\u9069\u7528\u3055\u308c\u3066\u3044\u308b<\/strong><\/span>\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3059\u3002<\/p>\n
\u7279\u5b9a\u306emigration\u30d5\u30a1\u30a4\u30eb\u3092\u5b9f\u884c\u3059\u308b\uff08up\/down\uff09<\/h2>\n
\u4ed6\u306emigration\u30d5\u30a1\u30a4\u30eb\u306e\u5b9f\u884c\u7d50\u679c\u306b\u5f71\u97ff\u3092\u53d7\u3051\u306a\u3044\u5834\u5408\u306f\u3001\u7279\u5b9a\u306emigration\u30d5\u30a1\u30a4\u30eb\u3092\u5b9f\u884c\u3057\u3066\u3082\u554f\u984c\u306a\u3044\u3067\u3057\u3087\u3046\u3002<\/p>\n
\u4eca\u56de\u306e\u4f8b\u3067\u306f\u30013\u3064\u76ee\u307e\u3067\u306emigration\u30d5\u30a1\u30a4\u30eb\u3092\u9069\u7528\u6e08\u307f\u306e\u3068\u304d\u306b\u30015\u3064\u76ee\uff08Migration ID\uff1a20180704020017\uff1ainteger_col\u30ab\u30e9\u30e0\u3092\u8ffd\u52a0\u3059\u308b\uff09\u3092\u9069\u7528\u3057\u305f\u308a\u3001\u5916\u3057\u305f\u308a\u3057\u3066\u3082\u554f\u984c\u306a\u3044<\/strong><\/span>\u3067\u3057\u3087\u3046\u3002<\/p>\n
\u4e00\u65b9\u30013\u3064\u76ee\uff08Migration ID\uff1a20180704015655\uff1astring_col\u30ab\u30e9\u30e0\u306e\u540d\u524d\u3092\u3001address\u30ab\u30e9\u30e0\u306b\u5909\u66f4\u3059\u308b\uff09\u306f\u3001string_col\u30ab\u30e9\u30e0\u304c\u7121\u3044\u72b6\u614b\u3067\u5b9f\u884c\u3057\u3066\u3082\u3001\u5b9f\u884c\u3055\u308c\u307e\u305b\u3093\u3002<\/p>\n
3\u3064\u76ee\u306e\u3088\u3046\u306amigration\u30d5\u30a1\u30a4\u30eb\u306f\u3001\u4ed6\u306e\u30d5\u30a1\u30a4\u30eb\u306e\u5b9f\u884c\u7d50\u679c\u306b\u5f71\u97ff\u3092\u53d7\u3051\u307e\u3059\u306e\u3067\u3001\u5358\u72ec\u3067\u5b9f\u884c\u3059\u308b\u3053\u3068\u306f\u907f\u3051\u307e\u3057\u3087\u3046\u3002<\/strong><\/span><\/p>\n
migration\u30d5\u30a1\u30a4\u30eb\u306f\u9806\u756a\u306b\u9069\u7528\u3059\u308b\u3053\u3068\u3092\u524d\u63d0\u306b\u4f5c\u6210\u3055\u308c\u308b\u3053\u3068\u304c\u591a\u3044\u305f\u3081\u3001\u5b89\u6613\u306b\u4e00\u90e8\u3060\u3051\u3092\u9069\u7528\u3057\u305f\u308a\u3001\u9006\u306b\u4e00\u90e8\u3060\u3051\u3092\u5916\u3057\u305f\u308a\u3059\u308b\u3079\u304d\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n
up\/down\u306f\u3001\u5f71\u97ff\u7bc4\u56f2\u3092\u5341\u5206\u306b\u691c\u8a0e\u3057\u305f\u3046\u3048\u3067\u5b9f\u884c\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/strong><\/span><\/p>\n
migration\u30d5\u30a1\u30a4\u30eb\u306eup\u30e1\u30bd\u30c3\u30c9\u3092\u5b9f\u884c\u3059\u308b\uff08up\uff09<\/h3>\n
\u7279\u5b9a\u306emigration\u30d5\u30a1\u30a4\u30eb\u3060\u3051\u3092\u5b9f\u884c\u3059\u308b\u306b\u306f\u3001bin\/rails db:migrate:up\u30b3\u30de\u30f3\u30c9\u3092\u5b9f\u884c\u3057\u307e\u3059\u3002<\/p>\n
\u3053\u3053\u3067\u306f\u30015\u3064\u76ee\uff08Migration ID\uff1a20180704020017\uff1ainteger_col\u30ab\u30e9\u30e0\u3092\u8ffd\u52a0\u3059\u308b\uff09\u3060\u3051\u3092\u9069\u7528\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n
\uff081\uff09\u4ee5\u4e0b\u306e\u30b3\u30de\u30f3\u30c9\u3092\u5b9f\u884c\u3057\u307e\u3059\u3002<\/p>\n
bin\/rails db:migrate:up VERSION=20180704020017<\/pre>\n
\u5b9f\u884c\u7d50\u679c\uff1a<\/p>\n
== 20180704020017 AddIntegerColToSample: migrating ============================\r\n-- add_column(:samples, :integer_col, :integer)\r\n   -> 0.0010s\r\n== 20180704020017 AddIntegerColToSample: migrated (0.0012s) ===================<\/pre>\n
migration\u30d5\u30a1\u30a4\u30eb\u306e\u9069\u7528\u72b6\u6cc1\u3092\u78ba\u8a8d\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n
\uff082\uff09\u4ee5\u4e0b\u306e\u30b3\u30de\u30f3\u30c9\u3092\u5b9f\u884c\u3057\u307e\u3059\u3002<\/p>\n
bin\/rake db:migrate:status<\/pre>\n
\u5b9f\u884c\u7d50\u679c\uff1a<\/p>\n
Running via Spring preloader in process 6726\r\n\r\ndatabase: \/home\/yazaki-mint\/app\/samurai\/migrate-demo\/db\/development.sqlite3\r\n\r\n Status   Migration ID    Migration Name\r\n--------------------------------------------------\r\n   up     20180704015653  Create sample\r\n   up     20180704015654  Add string col to sample\r\n   up     20180704015655  Rename from string col to address on sample\r\n  down    20180704015656  Remove address from sample\r\n   up     20180704020017  Add integer col to sample<\/pre>\n
4\u3064\u76ee\u304c\u672a\u9069\u7528\uff08down\uff09\u306e\u307e\u307e\u30015\u3064\u76ee\uff08Migration ID\uff1a20180704020017\uff1ainteger_col\u30ab\u30e9\u30e0\u3092\u8ffd\u52a0\u3059\u308b\uff09\u304c\u9069\u7528\uff08up\uff09\u3055\u308c\u3066\u3044\u307e\u3059\u306d\u3002<\/p>\n
\u30c6\u30fc\u30d6\u30eb\u306e\u30ab\u30e9\u30e0\u60c5\u5831\u3092\u78ba\u8a8d\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n
\uff083\uff09\u4ee5\u4e0b\u306e\u30b3\u30de\u30f3\u30c9\u30921\u884c\u305a\u3064\u9806\u756a\u306b\u5165\u529b\u3057\u307e\u3059\u3002<\/p>\n
bin\/rails dbconsole\r\nPRAGMA TABLE_INFO(samples);<\/pre>\n
\u5b9f\u884c\u7d50\u679c\uff1a<\/p>\n
0|id|integer|1||1\r\n1|name|varchar|0|NULL|0\r\n2|address|varchar|0|NULL|0\r\n3|integer_col|integer|0||0<\/pre>\n
\u78ba\u304b\u306baddress\u30ab\u30e9\u30e0\u3068integer_col\u30ab\u30e9\u30e0\u306e\u4e21\u65b9\u304c\u3042\u308a\u307e\u3059\u306d\u3002<\/strong><\/span><\/p>\n
\uff084\uff09\u4ee5\u4e0b\u306e\u30b3\u30de\u30f3\u30c9\u3092\u5165\u529b\u3057\u307e\u3059\u3002<\/p>\n
.exit<\/pre>\n
migration\u30d5\u30a1\u30a4\u30eb\u306edown\u30e1\u30bd\u30c3\u30c9\u3092\u5b9f\u884c\u3059\u308b\uff08down\uff09<\/h3>\n
\u4eca\u5ea6\u306f\u30015\u3064\u76ee\uff08Migration ID\uff1a20180704020017\uff1ainteger_col\u30ab\u30e9\u30e0\u3092\u8ffd\u52a0\u3059\u308b\uff09\u3060\u3051\u3092\u5916\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n
\u7279\u5b9a\u306emigration\u30d5\u30a1\u30a4\u30eb\u3060\u3051\u3092\u5916\u3059\u306b\u306f\u3001bin\/rails db:migrate:down\u30b3\u30de\u30f3\u30c9\u3092\u5b9f\u884c\u3057\u307e\u3059\u3002<\/p>\n
\uff081\uff09\u4ee5\u4e0b\u306e\u30b3\u30de\u30f3\u30c9\u3092\u5b9f\u884c\u3057\u307e\u3059\u3002<\/p>\n
bin\/rails db:migrate:down VERSION=20180704020017<\/pre>\n
\u5b9f\u884c\u7d50\u679c\uff1a<\/p>\n
== 20180704020017 AddIntegerColToSample: reverting ============================\r\n-- remove_column(:samples, :integer_col, :integer)\r\n   -> 0.0060s\r\n== 20180704020017 AddIntegerColToSample: reverted (0.0078s) ===================<\/pre>\n
migration\u30d5\u30a1\u30a4\u30eb\u306e\u9069\u7528\u72b6\u6cc1\u3092\u78ba\u8a8d\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n
\uff082\uff09\u4ee5\u4e0b\u306e\u30b3\u30de\u30f3\u30c9\u3092\u5b9f\u884c\u3057\u307e\u3059\u3002<\/p>\n
bin\/rake db:migrate:status<\/pre>\n
\u5b9f\u884c\u7d50\u679c\uff1a<\/p>\n
Running via Spring preloader in process 6860\r\n\r\ndatabase: \/home\/yazaki-mint\/app\/samurai\/migrate-demo\/db\/development.sqlite3\r\n\r\n Status   Migration ID    Migration Name\r\n--------------------------------------------------\r\n   up     20180704015653  Create sample\r\n   up     20180704015654  Add string col to sample\r\n   up     20180704015655  Rename from string col to address on sample\r\n  down    20180704015656  Remove address from sample\r\n  down    20180704020017  Add integer col to sample<\/pre>\n
5\u3064\u76ee\uff08Migration ID\uff1a20180704020017\uff1ainteger_col\u30ab\u30e9\u30e0\u3092\u8ffd\u52a0\u3059\u308b\uff09\u304c\u5916\u3055\u308c\u307e\u3057\u305f\u3002<\/p>\n
\u30c6\u30fc\u30d6\u30eb\u306e\u30ab\u30e9\u30e0\u60c5\u5831\u3092\u78ba\u8a8d\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n
\uff083\uff09\u4ee5\u4e0b\u306e\u30b3\u30de\u30f3\u30c9\u30921\u884c\u305a\u3064\u9806\u756a\u306b\u5165\u529b\u3057\u307e\u3059\u3002<\/p>\n
bin\/rails dbconsole\r\nPRAGMA TABLE_INFO(samples);<\/pre>\n
\u5b9f\u884c\u7d50\u679c\uff1a<\/p>\n
0|id|integer|1||1\r\n1|name|varchar|0|NULL|0\r\n2|address|varchar|0|NULL|0<\/pre>\n
address\u30ab\u30e9\u30e0\u306f\u3042\u308a\u307e\u3059\u304c\u3001integer_col\u30ab\u30e9\u30e0\u304c\u524a\u9664\u3055\u308c\u3066\u3044\u307e\u3059\u3002
\n<\/strong><\/span>
\n\uff084\uff09\u4ee5\u4e0b\u306e\u30b3\u30de\u30f3\u30c9\u3092\u5165\u529b\u3057\u307e\u3059\u3002<\/p>\n
.exit<\/pre>\n
\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3092\u4e00\u5ea6\u524a\u9664\u3057\u3066\u521d\u671f\u5316\u3059\u308b\uff08reset\uff09<\/h2>\n
migration\u30d5\u30a1\u30a4\u30eb\u304c\u5897\u3048\u3066\u304d\u305f\u308a\u3001up\/down\u3067\u7de8\u96c6\u3059\u308b\u3053\u3068\u304c\u591a\u304f\u306a\u3063\u305f\u3068\u304d\u306f\u3001\u518d\u73fe\u6027<\/strong><\/span>\uff08\u51aa\u7b49\u6027\uff1a\u3079\u304d\u3068\u3046\u305b\u3044\uff09\u3092\u78ba\u8a8d\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n
\u518d\u73fe\u6027\u3092\u78ba\u8a8d\u3059\u308b\u305f\u3081\u306b\u306f\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3092\u4e00\u5ea6\u524a\u9664\u3057\u3066\u304b\u3089\u3001\u3059\u3079\u3066\u306emigration\u30d5\u30a1\u30a4\u30eb\u3092\u9069\u7528\u3057\u3066\u3001\u5b9f\u884c\u7d50\u679c\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002<\/strong><\/span><\/p>\n
\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3092\u4e00\u5ea6\u524a\u9664\u3057\u305f\u308a\u518d\u9069\u7528\u3057\u305f\u308a\u3068\u3044\u3063\u305f\u4f5c\u696d\u304c\u5927\u5909\u305d\u3046\u306a\u30a4\u30e1\u30fc\u30b8\u3067\u3059\u304c\u3001rails\u3067\u306fbin\/rails db:migrate:reset\u30b3\u30de\u30f3\u30c9\u3092\u5b9f\u884c\u3059\u308b\u3060\u3051\u3067\u3059\u3002<\/p>\n
\uff081\uff09\u4ee5\u4e0b\u306e\u30b3\u30de\u30f3\u30c9\u3092\u5165\u529b\u3057\u307e\u3059\u3002<\/p>\n
bin\/rails db:migrate:reset<\/pre>\n
\u5b9f\u884c\u7d50\u679c\uff1a<\/p>\n
Running via Spring preloader in process 6963\r\nDropped database 'db\/development.sqlite3'\r\nDropped database 'db\/test.sqlite3'\r\nCreated database 'db\/development.sqlite3'\r\nCreated database 'db\/test.sqlite3'\r\n== 20180704015653 CreateSample: migrating =====================================\r\n-- create_table(:samples)\r\n   -> 0.0007s\r\n== 20180704015653 CreateSample: migrated (0.0008s) ============================\r\n\r\n== 20180704015654 AddStringColToSample: migrating =============================\r\n-- add_column(:samples, :string_col, :string)\r\n   -> 0.0007s\r\n== 20180704015654 AddStringColToSample: migrated (0.0008s) ====================\r\n\r\n== 20180704015655 RenameFromStringColToAddressOnSample: migrating =============\r\n-- rename_column(:samples, :string_col, :address)\r\n   -> 0.0161s\r\n== 20180704015655 RenameFromStringColToAddressOnSample: migrated (0.0162s) ====\r\n\r\n== 20180704015656 RemoveAddressFromSample: migrating ==========================\r\n-- remove_column(:samples, :address)\r\n   -> 0.0079s\r\n== 20180704015656 RemoveAddressFromSample: migrated (0.0081s) =================\r\n\r\n== 20180704020017 AddIntegerColToSample: migrating ============================\r\n-- add_column(:samples, :integer_col, :integer)\r\n   -> 0.0004s\r\n== 20180704020017 AddIntegerColToSample: migrated (0.0004s) ===================<\/pre>\n
\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u69cb\u9020\u304c\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u3063\u3066\u3044\u308b\u3067\u3057\u3087\u3046\u304b\u3002<\/p>\n
\u305c\u3072\u78ba\u8a8d\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n
0|id|integer|1||1\r\n1|name|varchar|0|NULL|0\r\n2|integer_col|integer|0||0<\/pre>\n
\u30ed\u30fc\u30eb\u30d0\u30c3\u30af\u3059\u308b\uff08rollback\uff09<\/h2>\n
\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u69cb\u9020\u3092\u524d\u306e\u72b6\u614b\u306b\u623b\u3059\u3053\u3068\u3092\u3001\u30ed\u30fc\u30eb\u30d0\u30c3\u30af\u3059\u308b<\/strong><\/span>\u3068\u8a00\u3044\u307e\u3059\u3002<\/p>\n
migration\u3092\u5229\u7528\u3057\u3066\u3044\u308c\u3070\u3001bin\/rails db:rollback\u3092\u4f7f\u7528\u3059\u308b\u3060\u3051\u3067\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u69cb\u9020\u3092\u4e00\u3064\u524d\u306e\u72b6\u614b\u306b\u623b\u305b\u307e\u3059\u3002<\/p>\n
migration\u30d5\u30a1\u30a4\u30eb\u3092\u4f5c\u6210\u3057\u305f\u3068\u304d\u306b\u3001bin\/rails db:migrate\u30b3\u30de\u30f3\u30c9\u3092\u5b9f\u884c\u3059\u308b\u5fc5\u8981\u304c\u3042\u3063\u305f\u3088\u3046\u306b\u3001\u30ed\u30fc\u30eb\u30d0\u30c3\u30af\u3059\u308b\u3068\u304d\u3082\u5c02\u7528\u30b3\u30de\u30f3\u30c9\uff08bin\/rails db:rollback\u30b3\u30de\u30f3\u30c9\uff09\u3092\u5b9f\u884c\u3059\u308b\u3068\u8a00\u3046\u308f\u3051\u3067\u3059\u3002<\/p>\n
\u306a\u304a\u3001\u4e0d\u8981\u306b\u601d\u3048\u308bmigratoin\u30d5\u30a1\u30a4\u30eb\u306f\u30ed\u30fc\u30eb\u30d0\u30c3\u30af\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u306e\u3067\u3001\u30ed\u30fc\u30eb\u30d0\u30c3\u30af\u304c\u5b8c\u4e86\u3057\u305f\u3089\u524a\u9664\u3057\u307e\u3057\u3087\u3046\u3002<\/strong><\/span><\/p>\n
\uff081\uff09\u4ee5\u4e0b\u306e\u30b3\u30de\u30f3\u30c9\u3092\u5b9f\u884c\u3057\u307e\u3059\u3002<\/p>\n
bin\/rails db:rollback<\/pre>\n
== 20180704020017 AddIntegerColToSample: reverting ============================\r\n-- remove_column(:samples, :integer_col, :integer)\r\n   -> 0.0049s\r\n== 20180704020017 AddIntegerColToSample: reverted (0.0069s) ===================<\/pre>\n
migration\u30d5\u30a1\u30a4\u30eb\u306e\u9069\u7528\u72b6\u6cc1\u3092\u78ba\u8a8d\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n
\uff082\uff09\u4ee5\u4e0b\u306e\u30b3\u30de\u30f3\u30c9\u3092\u5b9f\u884c\u3057\u307e\u3059\u3002<\/p>\n
bin\/rake db:migrate:status<\/pre>\n
\u5b9f\u884c\u7d50\u679c\uff1a<\/p>\n
Running via Spring preloader in process 7092\r\n\r\ndatabase: \/home\/yazaki-mint\/app\/samurai\/migrate-demo\/db\/development.sqlite3\r\n\r\n Status   Migration ID    Migration Name\r\n--------------------------------------------------\r\n   up     20180704015653  Create sample\r\n   up     20180704015654  Add string col to sample\r\n   up     20180704015655  Rename from string col to address on sample\r\n   up     20180704015656  Remove address from sample\r\n  down    20180704020017  Add integer col to sample<\/pre>\n
\u307e\u3068\u3081<\/h2>\n
\u4eca\u56de\u306f\u3001migration\uff08bin\/rails db:migrate\u30b3\u30de\u30f3\u30c9\uff09<\/strong><\/span>\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3057\u305f\u3002<\/p>\n
migration\u306f\u3001SQL\u6587\u3092\u66f8\u304b\u305a\u306b\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u69cb\u9020\u3092\u5909\u66f4\u3057\u305f\u308a\u3001\u5143\u306b\u623b\u3057\u305f\u308a\u3067\u304d\u308b<\/strong><\/span>\u3001\u975e\u5e38\u306b\u4fbf\u5229\u306a\u6a5f\u80fd\u3067\u3042\u308b\u3053\u3068\u304c\u308f\u304b\u3063\u3066\u3044\u305f\u3060\u3051\u305f\u3067\u3057\u3087\u3046\u304b\uff1f<\/p>\n
\u305c\u3072\u3053\u306e\u8a18\u4e8b\u3092\u53c2\u8003\u306b\u4f7f\u3063\u3066\u307f\u3066\u304f\u3060\u3055\u3044\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
Ruby on Rails\uff08\u4ee5\u964d\u3001rails\uff09\u3067Web\u30a2\u30d7\u30ea\u3092\u958b\u767a\u3057\u3066\u3044\u308b\u3068\u3001bin\/rails db:migrate\u30b3\u30de\u30f3\u30c9\u3092\u3088\u304f\u4f7f\u3044\u307e\u3059\u3002 \u3057\u304b\u3057 \u30fb\u305d\u3082\u305d\u3082migration\u3063\u3066\uff1f \u30fb\u4f7f\u3044\u65b9\u304c\u3044\u307e\u3044\u3061\u5206\u304b\u3089\u306a\u3044&# […]<\/p>\n","protected":false},"author":16433,"featured_media":62247,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"swell_btn_cv_data":"","footnotes":""},"categories":[2352],"tags":[],"class_list":["post-14229","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ruby-study"],"acf":[],"yoast_head":"\n\u3010Rails\u5165\u9580\u3011\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3092\u8a2d\u5b9a\u3059\u308brails db:migrate\u3092\u8aac\u660e\uff01 | 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