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在Rails 2.0.2和MySql 5.1中创建执行rake db:migrate的表时出错_Mysql_Ruby On Rails_Version Compatibility - Fatal编程技术网
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  • 在Rails 2.0.2和MySql 5.1中创建执行rake db:migrate的表时出错

在Rails 2.0.2和MySql 5.1中创建执行rake db:migrate的表时出错

mysql ruby-on-rails

在Rails 2.0.2和MySql 5.1中创建执行rake db:migrate的表时出错,mysql,ruby-on-rails,version-compatibility,Mysql,Ruby On Rails,Version Compatibility,我正在尝试从该站点实现一个rails配方应用程序。他们给出了一个很好的例子，突出了Rails对于敏捷开发的重要性。本文中的示例是在低于1.x的Rails版本中实现的 我正试图在2.0.2版中实现同样的功能。他们似乎已经使用MySql 4.1数据库实现了它。我目前正在Ubuntu 10.04平台上使用mysql客户端5.1。当我尝试使用rakedb:migrate时，我会遇到一些错误 我最初甚至在手动创建数据库表时也遇到了错误。对于某些属性，创建DB表的语法似乎已更改。例如。 帖子中创建Recip

我正在尝试从该站点实现一个rails配方应用程序。他们给出了一个很好的例子，突出了Rails对于敏捷开发的重要性。本文中的示例是在低于1.x的Rails版本中实现的

我正试图在2.0.2版中实现同样的功能。他们似乎已经使用MySql 4.1数据库实现了它。我目前正在Ubuntu 10.04平台上使用mysql客户端5.1。当我尝试使用rakedb:migrate时，我会遇到一些错误

我最初甚至在手动创建数据库表时也遇到了错误。对于某些属性，创建DB表的语法似乎已更改。例如。 帖子中创建Recipes表的命令对我不起作用

create table recipes (
    id                     int            not null auto_increment,
    category_id            int            not null,
    title                  varchar(100)   not null default '',
    description            varchar(255)   null,
    date                   date           null,
    instructions           text           null,
    constraint fk_recipes_categories foreign key (category_id) references categories(id),
    primary key(id)
) engine=InnoDB;
直到我修改了一些语法以适应5.1版。对我起作用的命令是：

create table recipes ( id int not null auto_increment, category_id int not null, title varchar(100) not null default '', description varchar(255) null, date date null, instructions text null, primary key (id), constraint fk_recipes_categories foreign key (category_id) references categories(id)) engine=InnoDB;
现在回到我的问题。我实际上是想做一些逆向工程，只是为了了解脚手架是如何工作的。起初我想了解它的意义，所以我试着手动操作

然后，我尝试使用scaffold命令来做一些事情，目前我仍然使用rakedb:migrate。我知道这似乎是一个太多的参考和一个太大的问题，但我想你需要检查一下，这样你就可以告诉我，为了使用rake db:migrate创建表，我需要进行哪些更改

mohnish@pc146724-desktop:~/railsprg/2011/Jan11/12jan11_recipes/cookbook2$ script/generate scaffold category id:integer name:string
/usr/lib/ruby/gems/1.8/gems/rails-2.0.2/lib/rails_generator/lookup.rb:207:Warning: Gem::SourceIndex#search support for Regexp patterns is deprecated, use #find_name
      exists  app/models/
      exists  app/controllers/
      exists  app/helpers/
      create  app/views/categories
      exists  app/views/layouts/
      exists  test/functional/
      exists  test/unit/
      create  app/views/categories/index.html.erb
      create  app/views/categories/show.html.erb
      create  app/views/categories/new.html.erb
      create  app/views/categories/edit.html.erb
      create  app/views/layouts/categories.html.erb
      create  public/stylesheets/scaffold.css
  dependency  model
/usr/lib/ruby/gems/1.8/gems/rails-2.0.2/lib/rails_generator/lookup.rb:207:Warning: Gem::SourceIndex#search support for Regexp patterns is deprecated, use #find_name
      exists    app/models/
      exists    test/unit/
      exists    test/fixtures/
      create    app/models/category.rb
      create    test/unit/category_test.rb
      create    test/fixtures/categories.yml
      create    db/migrate
      create    db/migrate/001_create_categories.rb
      create  app/controllers/categories_controller.rb
      create  test/functional/categories_controller_test.rb
      create  app/helpers/categories_helper.rb
       route  map.resources :categories
mohnish@pc146724-desktop:~/railsprg/2011/Jan11/12jan11_recipes/cookbook2$ script/generate scaffold recipe id:integer category_id:integer title:string description:text date:date instructions:text
/usr/lib/ruby/gems/1.8/gems/rails-2.0.2/lib/rails_generator/lookup.rb:207:Warning: Gem::SourceIndex#search support for Regexp patterns is deprecated, use #find_name
      exists  app/models/
      exists  app/controllers/
      exists  app/helpers/
      create  app/views/recipes
      exists  app/views/layouts/
      exists  test/functional/
      exists  test/unit/
      create  app/views/recipes/index.html.erb
      create  app/views/recipes/show.html.erb
      create  app/views/recipes/new.html.erb
      create  app/views/recipes/edit.html.erb
      create  app/views/layouts/recipes.html.erb
   identical  public/stylesheets/scaffold.css
  dependency  model
/usr/lib/ruby/gems/1.8/gems/rails-2.0.2/lib/rails_generator/lookup.rb:207:Warning: Gem::SourceIndex#search support for Regexp patterns is deprecated, use #find_name
      exists    app/models/
      exists    test/unit/
      exists    test/fixtures/
      create    app/models/recipe.rb
      create    test/unit/recipe_test.rb
      create    test/fixtures/recipes.yml
      exists    db/migrate
      create    db/migrate/002_create_recipes.rb
      create  app/controllers/recipes_controller.rb
      create  test/functional/recipes_controller_test.rb
      create  app/helpers/recipes_helper.rb
       route  map.resources :recipes
mohnish@pc146724-desktop:~/railsprg/2011/Jan11/12jan11_recipes/cookbook2$ rake db:create
(in /home/mohnish/railsprg/2011/Jan11/12jan11_recipes/cookbook2)
"db/development.sqlite3 already exists"
mohnish@pc146724-desktop:~/railsprg/2011/Jan11/12jan11_recipes/cookbook2$ rake db:create
(in /home/mohnish/railsprg/2011/Jan11/12jan11_recipes/cookbook2)
mohnish@pc146724-desktop:~/railsprg/2011/Jan11/12jan11_recipes/cookbook2$ rake db:migrate
(in /home/mohnish/railsprg/2011/Jan11/12jan11_recipes/cookbook2)
== 1 CreateCategories: migrating ==============================================
-- create_table(:categories)
rake aborted!
Mysql::Error: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '(11), `name` varchar(255) DEFAULT NULL, `created_at` datetime DEFAULT NULL, `upd' at line 1: CREATE TABLE `categories` (`id` int(11) DEFAULT NULL auto_increment PRIMARY KEY(11), `name` varchar(255) DEFAULT NULL, `created_at` datetime DEFAULT NULL, `updated_at` datetime DEFAULT NULL) ENGINE=InnoDB

(See full trace by running task with --trace)
mohnish@pc146724-desktop:~/railsprg/2011/Jan11/12jan11_recipes/cookbook2$ rake db:migrate --trace
(in /home/mohnish/railsprg/2011/Jan11/12jan11_recipes/cookbook2)
** Invoke db:migrate (first_time)
** Invoke environment (first_time)
** Execute environment
** Execute db:migrate
== 1 CreateCategories: migrating ==============================================
-- create_table(:categories)
rake aborted!
Mysql::Error: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '(11), `name` varchar(255) DEFAULT NULL, `created_at` datetime DEFAULT NULL, `upd' at line 1: CREATE TABLE `categories` (`id` int(11) DEFAULT NULL auto_increment PRIMARY KEY(11), `name` varchar(255) DEFAULT NULL, `created_at` datetime DEFAULT NULL, `updated_at` datetime DEFAULT NULL) ENGINE=InnoDB
/usr/lib/ruby/gems/1.8/gems/activerecord-2.0.2/lib/active_record/connection_adapters/abstract_adapter.rb:150:in `log'
/usr/lib/ruby/gems/1.8/gems/activerecord-2.0.2/lib/active_record/connection_adapters/mysql_adapter.rb:281:in `execute'
/usr/lib/ruby/gems/1.8/gems/activerecord-2.0.2/lib/active_record/connection_adapters/abstract/schema_statements.rb:104:in `create_table'
/usr/lib/ruby/gems/1.8/gems/activerecord-2.0.2/lib/active_record/connection_adapters/mysql_adapter.rb:416:in `create_table'
/usr/lib/ruby/gems/1.8/gems/activerecord-2.0.2/lib/active_record/migration.rb:285:in `send'
/usr/lib/ruby/gems/1.8/gems/activerecord-2.0.2/lib/active_record/migration.rb:285:in `method_missing'
/usr/lib/ruby/gems/1.8/gems/activerecord-2.0.2/lib/active_record/migration.rb:265:in `say_with_time'
/usr/lib/ruby/1.8/benchmark.rb:293:in `measure'
/usr/lib/ruby/gems/1.8/gems/activerecord-2.0.2/lib/active_record/migration.rb:265:in `say_with_time'
/usr/lib/ruby/gems/1.8/gems/activerecord-2.0.2/lib/active_record/migration.rb:281:in `method_missing'
./db/migrate//001_create_categories.rb:3:in `up_without_benchmarks'
/usr/lib/ruby/gems/1.8/gems/activerecord-2.0.2/lib/active_record/migration.rb:219:in `send'
/usr/lib/ruby/gems/1.8/gems/activerecord-2.0.2/lib/active_record/migration.rb:219:in `migrate'
/usr/lib/ruby/1.8/benchmark.rb:293:in `measure'
/usr/lib/ruby/gems/1.8/gems/activerecord-2.0.2/lib/active_record/migration.rb:219:in `migrate'
/usr/lib/ruby/gems/1.8/gems/activerecord-2.0.2/lib/active_record/migration.rb:348:in `migrate'
/usr/lib/ruby/gems/1.8/gems/activerecord-2.0.2/lib/active_record/migration.rb:339:in `each'
/usr/lib/ruby/gems/1.8/gems/activerecord-2.0.2/lib/active_record/migration.rb:339:in `migrate'
/usr/lib/ruby/gems/1.8/gems/activerecord-2.0.2/lib/active_record/migration.rb:307:in `up'
/usr/lib/ruby/gems/1.8/gems/activerecord-2.0.2/lib/active_record/migration.rb:298:in `migrate'
/usr/lib/ruby/gems/1.8/gems/rails-2.0.2/lib/tasks/databases.rake:85
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:636:in `call'
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:636:in `execute'
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:631:in `each'
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:631:in `execute'
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:597:in `invoke_with_call_chain'
/usr/lib/ruby/1.8/monitor.rb:242:in `synchronize'
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:590:in `invoke_with_call_chain'
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:583:in `invoke'
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2051:in `invoke_task'
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2029:in `top_level'
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2029:in `each'
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2029:in `top_level'
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2068:in `standard_exception_handling'
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2023:in `top_level'
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2001:in `run'
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2068:in `standard_exception_handling'
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:1998:in `run'
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/bin/rake:31
/usr/bin/rake:19:in `load'
/usr/bin/rake:19
mohnish@pc146724-desktop:~/railsprg/2011/Jan11/12jan11_recipes/cookbook2$
db/migrate/001_create_categories.rb&db/migrate/002_create_recipes.rb如下所示：

class CreateCategories < ActiveRecord::Migration
  def self.up
    create_table :categories do |t|
      t.integer :id
      t.string :name

      t.timestamps
    end
  end

  def self.down
    drop_table :categories
  end
end

class CreateRecipes < ActiveRecord::Migration
  def self.up
    create_table :recipes do |t|
      t.integer :id
      t.integer :category_id
      t.string :title
      t.text :description
      t.date :date
      t.text :instructions

      t.timestamps
    end
  end

  def self.down
    drop_table :recipes
  end
end

class-CreateCategories
感谢您的帮助。

在迁移过程中，您不需要
t.integer:id
，您可以免费获得它。移除它

是一个很好的资源。

您好，脚手架一代做得很好，是的，我非常清楚我没有使用首选的gems版本，谢谢。。。实际上，我在文章中提到了运行“rakedb:migrate”时遇到的错误。我无法克服它并创建表格。如何克服这个问题是我主要寻找的。对不起，我的错误，我没有一直向下滚动查看错误。你能告诉我们db/migrate/001\u create\u categories.rb是什么样子吗？我把那个东西从脚手架上拿了下来。。成功了。。！！谢谢你，乔治。。！！