Rails的遷移錯誤

我試圖讓傳統的Rails應用程序和運行，當我做了耙分貝：遷移Rails的遷移錯誤

我得到如下：

arx_rails [master●] % rake db:migrate 
== AddSessionsTable: migrating =============================================== 
-- create_table(:sessions) 
rake aborted! 
An error has occurred, all later migrations canceled: 

Mysql2::Error: All parts of a PRIMARY KEY must be NOT NULL; if you need NULL in a key, use UNIQUE instead: CREATE TABLE `sessions` (`id` int(11) DEFAULT NULL auto_increment PRIMARY KEY, `session_id` varchar(255) NOT NULL, `data` text, `created_at` datetime NOT NULL, `updated_at` datetime NOT NULL) ENGINE=InnoDB/Users/steve/.rvm/gems/ruby-1.9.3-p194/gems/activerecord-3.2.8/lib/active_record/connection_adapters/abstract_mysql_adapter.rb:245:in `query' 
/Users/steve/.rvm/gems/ruby-1.9.3-p194/gems/activerecord-3.2.8/lib/active_record/connection_adapters/abstract_mysql_adapter.rb:245:in `block in execute' 
/Users/steve/.rvm/gems/ruby-1.9.3-p194/gems/activerecord-3.2.8/lib/active_record/connection_adapters/abstract_adapter.rb:280:in `block in log' 
/Users/steve/.rvm/gems/ruby-1.9.3-p194/gems/activesupport-3.2.8/lib/active_support/notifications/instrumenter.rb:20:in `instrument' 
/Users/steve/.rvm/gems/ruby-1.9.3-p194/gems/activerecord-3.2.8/lib/active_record/connection_adapters/abstract_adapter.rb:275:in `log' 
/Users/steve/.rvm/gems/ruby-1.9.3-p194/gems/activerecord-3.2.8/lib/active_record/connection_adapters/abstract_mysql_adapter.rb:245:in `execute' 
/Users/steve/.rvm/gems/ruby-1.9.3-p194/gems/activerecord-3.2.8/lib/active_record/connection_adapters/mysql2_adapter.rb:211:in `execute' 
/Users/steve/.rvm/gems/ruby-1.9.3-p194/gems/activerecord-3.2.8/lib/active_record/connection_adapters/abstract/schema_statements.rb:170:in `create_table' 
/Users/steve/.rvm/gems/ruby-1.9.3-p194/gems/activerecord-3.2.8/lib/active_record/connection_adapters/abstract_mysql_adapter.rb:434:in `create_table' 
/Users/steve/.rvm/gems/ruby-1.9.3-p194/gems/activerecord-3.2.8/lib/active_record/migration.rb:466:in `block in method_missing' 
/Users/steve/.rvm/gems/ruby-1.9.3-p194/gems/activerecord-3.2.8/lib/active_record/migration.rb:438:in `block in say_with_time' 
/Users/steve/.rvm/gems/ruby-1.9.3-p194/gems/activerecord-3.2.8/lib/active_record/migration.rb:438:in `say_with_time' 
/Users/steve/.rvm/gems/ruby-1.9.3-p194/gems/activerecord-3.2.8/lib/active_record/migration.rb:458:in `method_missing' 
/Users/steve/projects/asu/arx_rails/db/migrate/20120825213542_add_sessions_table.rb:3:in `change' 
/Users/steve/.rvm/gems/ruby-1.9.3-p194/gems/activerecord-3.2.8/lib/active_record/migration.rb:407:in `block (2 levels) in migrate' 
/Users/steve/.rvm/gems/ruby-1.9.3-p194/gems/activerecord-3.2.8/lib/active_record/migration.rb:407:in `block in migrate' 
/Users/steve/.rvm/gems/ruby-1.9.3-p194/gems/activerecord-3.2.8/lib/active_record/connection_adapters/abstract/connection_pool.rb:123:in `with_connection' 
/Users/steve/.rvm/gems/ruby-1.9.3-p194/gems/activerecord-3.2.8/lib/active_record/migration.rb:389:in `migrate' 
/Users/steve/.rvm/gems/ruby-1.9.3-p194/gems/activerecord-3.2.8/lib/active_record/migration.rb:528:in `migrate' 
/Users/steve/.rvm/gems/ruby-1.9.3-p194/gems/activerecord-3.2.8/lib/active_record/migration.rb:720:in `block (2 levels) in migrate' 
/Users/steve/.rvm/gems/ruby-1.9.3-p194/gems/activerecord-3.2.8/lib/active_record/migration.rb:777:in `call' 
/Users/steve/.rvm/gems/ruby-1.9.3-p194/gems/activerecord-3.2.8/lib/active_record/migration.rb:777:in `ddl_transaction' 
/Users/steve/.rvm/gems/ruby-1.9.3-p194/gems/activerecord-3.2.8/lib/active_record/migration.rb:719:in `block in migrate' 
/Users/steve/.rvm/gems/ruby-1.9.3-p194/gems/activerecord-3.2.8/lib/active_record/migration.rb:700:in `each' 
/Users/steve/.rvm/gems/ruby-1.9.3-p194/gems/activerecord-3.2.8/lib/active_record/migration.rb:700:in `migrate' 
/Users/steve/.rvm/gems/ruby-1.9.3-p194/gems/activerecord-3.2.8/lib/active_record/migration.rb:570:in `up' 
/Users/steve/.rvm/gems/ruby-1.9.3-p194/gems/activerecord-3.2.8/lib/active_record/migration.rb:551:in `migrate' 
/Users/steve/.rvm/gems/ruby-1.9.3-p194/gems/activerecord-3.2.8/lib/active_record/railties/databases.rake:153:in `block (2 levels) in  <top (required)>' 
/Users/steve/.rvm/gems/ruby-1.9.3-p194/bin/ruby_executable_hooks:15:in `eval' 
/Users/steve/.rvm/gems/ruby-1.9.3-p194/bin/ruby_executable_hooks:15:in `<main>'

遷移文件是：

class AddSessionsTable < ActiveRecord::Migration 
    def change 
    create_table :sessions do |t| 
     t.string :session_id, :null => false 
     t.text :data 
     t.timestamps 
    end 

    add_index :sessions, :session_id 
    add_index :sessions, :updated_at 
    end 
end

Rails的一貫創建id字段本身，而不必有我t在遷移文件中顯式編碼，並使其成爲主鍵，但沒有默認值。所以，我想知道它可能會將新建表的ID字段設置爲NULL的DEFAULT。在某些我不知道的配置文件中？

有沒有人見過這個？

來源

2016-01-12 jediunixkid

它看起來像Rails和MySQL的一個問題： https://github.com/rails/rails/pull/13247

在筆記，用戶「PJG」提出以下建議：

使用Rails 2.3.5，MySQL的版本5.7。 9和MySQL的寶石，你需要有該位爲初始化中 config/initializers/abstract_mysql_adapter.rb：
class ActiveRecord::ConnectionAdapters::MysqlAdapter 
    NATIVE_DATABASE_TYPES[:primary_key] = "int(11) auto_increment PRIMARY KEY" 
end 
對於mysql2應該配置/初始化/ abstract_mysql2_adapter.rb：
class ActiveRecord::ConnectionAdapters::Mysql2Adapter 
    NATIVE_DATABASE_TYPES[:primary_key] = "int(11) auto_increment PRIMARY KEY" 
end 

這是否解決了問題？

（編輯：給予信貸解決方案提供商）

來源

2016-01-13 00:23:55 vthomas2007

對於Rails開發3.0.5這樣工作：

class ActiveRecord::ConnectionAdapters::ColumnDefinition 
    def sql_type 
    type.to_sym == :primary_key ? 'int(11) auto_increment PRIMARY KEY' : base.type_to_sql(type.to_sym, limit, precision, scale) rescue type 
    end 
end

來源

2016-11-17 17:18:08 vl3

使用Rails 4.0.6正常工作：

config/initializers/abstract_mysql2_adapter.rb: 

class ActiveRecord::ConnectionAdapters::Mysql2Adapter 
    NATIVE_DATABASE_TYPES[:primary_key] = "int(11) NOT NULL auto_increment PRIMARY KEY" 
end 

$ gem list mysql

*本地GEMS * mysql2（0.3.18）

來源

2017-02-23 11:28:54 hejeroaz

Rails的遷移錯誤

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