Ridgepole is a tool to manage DB schema.

It defines DB schema using Rails DSL, and updates DB schema according to DSL. (like Chef/Puppet)

Gem Version Build Status Coverage Status

ChangeLog * `>= 0.4.8` * `activerecord-mysql-unsigned` is now optional. Please pass `--enable-mysql-unsigned` after you install [activerecord-mysql-unsigned](https://github.com/waka/activerecord-mysql-unsigned) if you want to use. * Please pass `--enable-foreigner` after you install [foreigner](https://github.com/matthuhiggins/foreigner) if you want to use the foreign key. * `>= 0.4.11` * Add `--enable-mysql-pkdump` option. * `>= 0.4.12` * Fix `activerecord-mysql-unsigned` version: `~> 0.2.0` * `>= 0.5.0` * Fix `activerecord-mysql-unsigned` version: `~> 0.3.1` * `>= 0.5.1` * Add `--enable-migration-comments` option ([migration_comments](https://github.com/pinnymz/migration_comments) is required) * Fix rails version `< 4.2.0` * `>= 0.5.2` * Add `--enable-mysql-awesome` option ([activerecord-mysql-awesome](https://github.com/kamipo/activerecord-mysql-awesome) is required `>= 0.0.3`) * It is not possible to enable both `--enable-mysql-awesome` and `--enable-migration-comments`, `--enable-mysql-awesome` and `--enable-mysql-unsigned`, `--enable-mysql-awesome` and `--enable-mysql-pkdump` * Fix foreigner version `<= 1.7.1` * `>= 0.6.0` * Fix rails version `~> 4.2.1` * Disable following libraries support: * activerecord-mysql-unsigned * migration_comments * foreigner * Disable sqlite support * Add PostgreSQL test * Remove `--mysql-awesome-unsigned-pk` option * `>= 0.6.1` * Support [PostgreSQL columns](https://github.com/winebarrel/rails/blob/v4.2.1/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb#L79) * `>= 0.6.3` * Fix `default` option ([pull#48](https://github.com/winebarrel/ridgepole/pull/48)) * Add `--enable-migration-comments` option ([pull#50](https://github.com/winebarrel/ridgepole/pull/50)) * Disable `rename_table_indexes` * `>= 0.6.4` * Execute sql using external script ([pull#56](https://github.com/winebarrel/ridgepole/pull/56)) * Add `--mysql-use-alter` option * Add `--alter-extra` option * Add `--dump-with-default-fk-name` option * Support `t.index` ([pull#64](https://github.com/winebarrel/ridgepole/pull/64)) * Remove migration_comments * Fix foreign key apply order * `>= 0.6.5` * Fix rails version `'>= 4.2', '< 6'` * Support new types ([pull#84](https://github.com/winebarrel/ridgepole/pull/84)) * Support `default: -> { ... }` ([pull#85](https://github.com/winebarrel/ridgepole/pull/85)) * Support DDL Comment (Rails5 only) * Output schema diff when pass `--verbose` * Support composite primary key (Rails5 only / [pull#97](https://github.com/winebarrel/ridgepole/pull/97)) * `>= 0.6.6` * Use `t.column` for migration ([pull#114](https://github.com/winebarrel/ridgepole/pull/114)) * Support DATABASE_URL format ([pull#118](https://github.com/winebarrel/ridgepole/pull/118)) * Add Ruby2.4 CI ([pull#119](https://github.com/winebarrel/ridgepole/pull/119)) * `>= 0.7.0` * Remove Rails 4.x support * Add Rails 5.1 support * Remove `--enable-mysql-awesome` option * Add `--skip-drop-table` option * Support foreign key without name * Support MySQL JSON Type and Generated Columns * Add `--mysql-change-table-options` option * Pass config from env * Fix change fk order * Add `--check-relation-type` option * Add `--skip-column-comment-change` option * Add `--default-bigint-limit` option * Add `--ignore-table-comment` option * `>= 0.7.1` * Remove `--reverse` option * Add `--allow-pk-change` option * Add `--create-table-with-index` option * Add `--mysql-dump-auto-increment` option (`rails >= 5.1`) * `>= 0.7.2` * Support Rails 5.2 * `>= 0.7.3` * Add `--mysql-change-table-comment option` ([pull#166](https://github.com/winebarrel/ridgepole/pull/166)) * Refactoring with RuboCop * Support primary key adding/dropping ([issue#246](https://github.com/winebarrel/ridgepole/issues/246)) * `>= 0.7.4` * Fix `add_foreign_key` options ([issue#250](https://github.com/winebarrel/ridgepole/issues/250)) * `>= 0.7.5` * Fix polymorphic options ([pull#263](https://github.com/winebarrel/ridgepole/pull/263)) * Fix `--mysql-use-alter` option ([pull#246](https://github.com/winebarrel/ridgepole/pull/264)) * Fix Database URI parsing ([pull#265](https://github.com/winebarrel/ridgepole/pull/265)) * `>= 0.7.6` * Fix database url check ([pull#266](https://github.com/winebarrel/ridgepole/pull/266)) * Add ignore option ([pull#267](https://github.com/winebarrel/ridgepole/pull/267)) * `>= 0.7.7` * Support URI query string ([pull#273](https://github.com/winebarrel/ridgepole/pull/273)) * `>= 0.7.8` * Fix for `add_foreign_key(..., column: ,,,)` ([pull#278](https://github.com/winebarrel/ridgepole/pull/278)) * `>= 0.8.0` * Support Rails 6.0 * `>= 0.8.1` * Drop tables in an order considering foreign key constraints ([pull#284](https://github.com/winebarrel/ridgepole/pull/284)) * `>= 0.8.2` * Support `postgres://` schema ([pull#285](https://github.com/winebarrel/ridgepole/pull/285)) * `>= 0.8.3` * Fix "topological sort failed" error ([pull#287](https://github.com/winebarrel/ridgepole/pull/287)) * `>= 0.8.4` * Display a warning if an InnoDB table doesn't have any indexes on a column where it has a foreign key ([pull#290](https://github.com/winebarrel/ridgepole/pull/290)) * `>= 0.8.5` * Improve warning message on table options ([pull#291](https://github.com/winebarrel/ridgepole/pull/291)) * `>= 0.8.6` * Support multiple databases feature ([pull#297](https://github.com/winebarrel/ridgepole/pull/297))


Add this line to your application's Gemfile:

gem 'ridgepole'

And then execute:

$ bundle

Or install it yourself as:

$ gem install ridgepole

Omnibus Package (deb/rpm)

see https://github.com/winebarrel/ridgepole/releases.

Install from deb

sudo dpkg -i ridgepole_x.x.x+xxx-x_amd64.deb
sudo apt install build-essential libmysqlclient-dev
sudo /opt/ridgepole/embedded/bin/gem install mysql2

Install from rpm

sudo yum install ridgepole-x.x.x+xxx-x.el7.x86_64.rpm
sudo yum install make gcc mariadb-devel
sudo /opt/ridgepole/embedded/bin/gem install mysql2


Usage: ridgepole [options]
    -c, --config CONF_OR_FILE
    -E, --env ENVIRONMENT
    -s, --spec-name SPEC_NAME
    -a, --apply
    -m, --merge
    -f, --file SCHEMAFILE
        --table-options OPTIONS
        --alter-extra ALTER_SPEC
        --external-script SCRIPT
        --default-bool-limit LIMIT
        --default-int-limit LIMIT
        --default-bigint-limit LIMIT
        --default-float-limit LIMIT
        --default-string-limit LIMIT
        --default-text-limit LIMIT
        --default-binary-limit LIMIT
        --pre-query QUERY
        --post-query QUERY
    -e, --export
    -d, --diff DSL1 DSL2
    -o, --output SCHEMAFILE
    -t, --tables TABLES
        --ignore-tables REGEX_LIST
        --check-relation-type DEF_PK
    -r, --require LIBS
        --log-file LOG_FILE
    -v, --version


$ git init
Initialized empty Git repository in ...

$ cat config.yml
adapter: mysql2
encoding: utf8
database: blog
username: root

$ ridgepole -c config.yml --export -o Schemafile
# or `ridgepole -c '{adapter: mysql2, database: blog}' ...`
# or `ridgepole -c 'mysql2://root:[email protected]:3306/blog' ...`
# or `export DB_URL='mysql2://...'; ridgepole -c env:DB_URL ...`
Export Schema to `Schemafile`

$ cat Schemafile
create_table "articles", force: :cascade do |t|
  t.string   "title"
  t.text     "text"
  t.datetime "created_at"
  t.datetime "updated_at"

$ git add .
$ git commit -m 'first commit'  -a
[master (root-commit) a6c2d31] first commit
 2 files changed, 10 insertions(+)
 create mode 100644 Schemafile
 create mode 100644 config.yml

$ vi Schemafile
$ git diff
diff --git a/Schemafile b/Schemafile
index f5848b9..c266fed 100644
--- a/Schemafile
+++ b/Schemafile
@@ -1,6 +1,7 @@
 create_table "articles", force: :cascade do |t|
   t.string   "title"
   t.text     "text"
+  t.text     "author"
   t.datetime "created_at"
   t.datetime "updated_at"

$ ridgepole -c config.yml --apply --dry-run
Apply `Schemafile` (dry-run)
add_column("articles", "author", :text, {:after=>"text"})

# ALTER TABLE `articles` ADD `author` text AFTER `text`

$ ridgepole -c config.yml --apply
Apply `Schemafile`
-- add_column("articles", "author", :text, {:after=>"text"})
   -> 0.0202s


create_table "articles", force: :cascade do |t|
  t.string   "title"
  t.text     "desc", renamed_from: "text"
  t.text     "author"
  t.datetime "created_at"
  t.datetime "updated_at"

create_table "user_comments", force: :cascade, renamed_from: "comments" do |t|
  t.string   "commenter"
  t.text     "body"
  t.integer  "article_id"
  t.datetime "created_at"
  t.datetime "updated_at"

Foreign Key

create_table "parent", force: :cascade do |t|

create_table "child", id: false, force: :cascade do |t|
  t.integer "id"
  t.integer "parent_id"

add_index "child", ["parent_id"], name: "par_ind", using: :btree

add_foreign_key "child", "parent", name: "child_ibfk_1"

Ignore Column/Index/FK

create_table "articles", force: :cascade do |t|
  t.string   "title", ignore: true # All changes are ignored
  t.text     "desc", renamed_from: "text"
  t.text     "author"
  t.datetime "created_at"
  t.datetime "updated_at"


You can use the column collation by passing --enable-mysql-awesome (activerecord-mysql-awesome is required)

create_table "articles", force: :cascade, options: "ENGINE=InnoDB DEFAULT CHARSET=utf8" do |t|
  t.string   "title",                    collation: "ascii_bin"
  t.text     "text",       null: false,  collation: "utf8mb4_bin"
  t.datetime "created_at"
  t.datetime "updated_at"


activerecord 5.0.0 and activerecord-mysql-awesome dumps a collation rather than charset because it does not determine the default collation for charset. Specifying a collation for each column would work if it is possible.

See mysql> show character set; to find charset / collation pair for your system.


create_table "authors", force: :cascade do |t|
  t.string "name", null: false

create_table "books", force: :cascade do |t|
  t.string  "title",     null: false
  t.integer "author_id", null: false

add_index "books", ["author_id"], name: "idx_author_id", using: :btree

execute("ALTER TABLE books ADD CONSTRAINT fk_author FOREIGN KEY (author_id) REFERENCES authors (id)") do |c|
  # Execute SQL only if there is no foreign key
    SELECT 1 FROM information_schema.key_column_usage
     WHERE TABLE_SCHEMA = 'bookshelf'
       AND CONSTRAINT_NAME = 'fk_author' LIMIT 1


$ ridgepole --diff file1.schema file2.schema
add_column("articles", "author", :text, {:after=>"title"})
rename_column("articles", "text", "desc")

# You can apply to the database the difference:
# $ ridgepole -c config.yml --diff file1.schema file2.schema --with-apply

You can also compare databases and files.

$ ridgepole --diff config.yml file1.schema
remove_column("articles", "author")

Execute SQL using external script

$ cat test.sh
echo "$SQL" | mysql -u root my_db

$ ridgepole -c config.yml --apply --external-script ./test.sh

Add extra statement to ALTER

$ ridgepole -a -c database.yml --alter-extra="LOCK=NONE" --debug
Apply `Schemafile`
-- add_column("dept_manager", "to_date2", :date, {:null=>false, :after=>"from_date"})
   (42.2ms)  ALTER TABLE `dept_manager` ADD `to_date2` date NOT NULL AFTER `from_date`,LOCK=NONE
   -> 0.0428s
-- remove_column("dept_manager", "to_date")
   (46.9ms)  ALTER TABLE `dept_manager` DROP `to_date`,LOCK=NONE
   -> 0.0471s


$ ridgepole -a -c database.yml --mysql-use-alter --debug
Apply `Schemafile`
-- remove_index("dept_manager", {:name=>"emp_no"})
   (19.2ms)  ALTER TABLE `dept_manager` DROP INDEX `emp_no`
   -> 0.0200s
-- add_index("dept_manager", ["emp_no"], {:name=>"emp_no2", :using=>:btree})
   (23.4ms)  ALTER TABLE `dept_manager` ADD  INDEX `emp_no2` USING btree (`emp_no`)
   -> 0.0243s

Relation column type check

create_table "employees", force: :cascade do |t|
  t.integer "emp_no", null: false
  t.string  "first_name", limit: 14, null: false
  t.string  "last_name", limit: 16, null: false

create_table "dept_manager", force: :cascade do |t|
  t.integer "employee_id"
  t.string  "dept_no", limit: 4, null: false
$ ridgepole -a -c database.yml --check-relation-type bigint # default primary key type (e.g. `<5.1`: integer, `>=5.1`: bigint for MySQL)
Apply `Schemafile`
[WARNING] Relation column type is different.
              employees.id: bigint
  dept_manager.employee_id: integer

Run tests

docker-compose up -d
bundle install
bundle exec appraisal install
bundle exec appraisal activerecord-5.1 rake
# POSTGRESQL=1 bundle exec appraisal activerecord-5.1 rake
# MYSQL57=1 bundle exec appraisal activerecord-5.1 rake

Notice: mysql-client/postgresql-client is required.


Example project

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