MySQL 5.5 / Redmine 3.4.3 / Ruby23-x64 --- Mysql2::Error: Specified key was too long; max key length is 767 bytes

Added by Leslie Martinez over 6 years ago

Hi,

Description :¶

I am unable to run : bundle exec rake db:migrate

Error :¶

== 91 ChangeChangesetsRevisionToString: migrating =============================
-- index_exists?(:changesets, [:repository_id, :revision], {:name=>:changesets_repos_rev})
   ->  0.0005s
-- index_exists?(:changesets, [:repository_id, :revision], {:name=>:altered_changesets_repos_rev})
   ->  0.0003s
-- change_column(:changesets, :revision, :string, {:null=>false})
   ->  0.0129s
-- add_index(:changesets, [:repository_id, :revision], {:unique=>true, :name=>:changesets_repos_rev})
rake aborted!
StandardError: An error has occurred, all later migrations canceled:

Mysql2::Error: Specified key was too long; max key length is 767 bytes: CREATE UNIQUE INDEX `changesets_repos_rev`  ON `changesets` (`repository_id`, `revision`)
C:/Users/lmartine/Documents/leslie/redmine-3.4.3/db/migrate/091_change_changesets_revision_to_string.rb:17:in `up'
C:in `migrate'

Caused by:
ActiveRecord::StatementInvalid: Mysql2::Error: Specified key was too long; max key length is 767 bytes: CREATE UNIQUE INDEX `changesets_repos_rev`  ON `changesets` (`repository_id`, `revision`)
C:/Users/lmartine/Documents/leslie/redmine-3.4.3/db/migrate/091_change_changesets_revision_to_string.rb:17:in `up'
C:in `migrate'

Caused by:
Mysql2::Error: Specified key was too long; max key length is 767 bytes
C:/Users/lmartine/Documents/leslie/redmine-3.4.3/db/migrate/091_change_changesets_revision_to_string.rb:17:in `up'
C:in `migrate'
Tasks: TOP => db:migrate
(See full trace by running task with --trace)

Environment :¶

- MySQL 5.5
- Redmine 3.4.3
- Ruby23-x64

Previous Actions :¶

- Download Redmine V3.4 (https://www.redmine.org/projects/redmine/wiki/RedmineInstall#fn1)
- Extract : C:\Users\lmartine\Documents\leslie\redmine-3.4.3
- Download and install Ruby V2.3 (C:\Ruby23-x64)
- Download Ruby DevKit (https://github.com/oneclick/rubyinstaller/wiki/Development-Kit)
- Extract : C:\Ruby23-x64\DevKit
- cd C:\Ruby23-x64\DevKit
- ruby dk.rb init
- ruby dk.rb install
- gem install redcarpet ~~v '3.4.0'~~
Install ImageMagick-6.9.8-2-Q8-x64-dll(http://www.ownway.info/Ruby/rmagick/howtoinstall/windows/en)
- set CPATH=C:\ImageMagick-6.9.8-Q8\include
- set LIBRARY_PATH=C:\ImageMagick-6.9.8-Q8\lib
- cd C:\Users\lmartine\Documents\leslie\redmine-3.4.3
- gem install rmagick
- gem install bundler
- bundle install --without development test

Could you please help me solve this issue ?

Thanks

Leslie

Replies (2)

[SOLVED] MySQL 5.5 / Redmine 3.4.3 / Ruby23-x64 --- Mysql2::Error: Specified key was too long; max key length is 767 bytes - Added by Leslie Martinez over 6 years ago

Hi,

I found the solution .

It seems to be a problem with the DB creation .

Here is what I did :

COMMAND LINES :¶

mysql -u root -p
drop database redmine
exit
mysql -u root -p -e "CREATE DATABASE redmine DEFAULT CHARACTER SET utf8 DEFAULT COLLATE utf8_general_ci;"

Thanks

Leslie

RE: MySQL 5.5 / Redmine 3.4.3 / Ruby23-x64 --- Mysql2::Error: Specified key was too long; max key length is 767 bytes - Added by David Gessel over 5 years ago

Still debugging this, still a problem with MySQL 5.6.41. 5.7.7 might fix it. If using the full UTF8 character sets, it is necessary to use utf8mb4 rather than 'utf8' as MySQL's UTF8 implementation isn't quite, so for example:

CREATE DATABASE redmine CHARACTER SET utf8mb4 COLLATE = utf8mb4_unicode_ci;

A good description of why is here: [[https://mathiasbynens.be/notes/mysql-utf8mb4]]

#23586 at the end has a solution to limiting the title length to VARCHAR which would be needed with the above specification for reasons described at mathiasbynens blog where Luc Lalonde advises (sauce is probably nanaya's comment at [[https://github.com/rails/rails/issues/9855#issuecomment-35618750]] ):

Add this script redmine/config/initializers/mysqlpls.rb:

require 'active_record/connection_adapters/abstract_mysql_adapter'

module ActiveRecord
  module ConnectionAdapters
    class AbstractMysqlAdapter
      NATIVE_DATABASE_TYPES[:string] = { :name => "varchar", :limit => 191 }
    end
  end
end

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