Windows和SQLite3到Ubuntu和PostgreSQL迁移问题

我在Windows中有我的开发环境，有人建议我将它从Windows迁移到Ubuntu，以及将数据库从股票SQLite3更改为PostgreSQL。原因是实现搜索会更容易。Windows和SQLite3到Ubuntu和PostgreSQL迁移问题

我试图在Windows中使它成为PostgreSQL，但不断遇到一个错误。现在我已经启动并运行在Ubuntu中，我收到了同样的错误消息。

20130218175105_devise_create_users.rb：

class DeviseCreateUsers < ActiveRecord::Migration 
def change 
    create_table(:users) do |t| 
     ## Database authenticatable 
     t.string :email,    :null => false, :default => "" 
     t.string :encrypted_password, :null => false, :default => "" 

    ## Recoverable 
    t.string :reset_password_token 
    t.datetime :reset_password_sent_at 

    ## Rememberable 
    t.datetime :remember_created_at 

    ## Trackable 
    t.integer :sign_in_count, :default => 0 
    t.datetime :current_sign_in_at 
    t.datetime :last_sign_in_at 
    t.string :current_sign_in_ip 
    t.string :last_sign_in_ip 

    ## Confirmable 
    # t.string :confirmation_token 
    # t.datetime :confirmed_at 
    # t.datetime :confirmation_sent_at 
    # t.string :unconfirmed_email # Only if using reconfirmable 

    ## Lockable 
    # t.integer :failed_attempts, :default => 0 # Only if lock strategy is :failed_attempts 
    # t.string :unlock_token # Only if unlock strategy is :email or :both 
    # t.datetime :locked_at 

    ## Token authenticatable 
    # t.string :authentication_token 


    t.timestamps 
end 

add_index :users, :email,    :unique => true 
    add_index :users, :reset_password_token, :unique => true 
    # add_index :users, :confirmation_token, :unique => true 
    # add_index :users, :unlock_token,   :unique => true 
    # add_index :users, :authentication_token, :unique => true 
    end 
end

20130224193041_add_username_to_users.rb：

class AddUsernameToUser < ActiveRecord::Migration 
    def change 
    add_column :users, :username, :string 
    end 
end

20130225171914_add_title_to_items.rb：

class AddTitleToItems < ActiveRecord::Migration 
    def change 
    add_column :items, :title, :string 

    end 
end

20130303014952_add_city_state_to_users.rb：

class AddCityStateToUsers < ActiveRecord::Migration 
    def change 
    add_column :users, :city, :string 

    add_column :users, :state, :string 

    end 
end

的database.yml：

development: 
adapter: postgresql 
encoding: unicode 
database: scratch_development 
pool: 5 
timeout: 5000 
username: postgres 
password: harley 
host: localhost

错误：

[email protected]:~/Sites/scratch$ rake db:migrate 
== DeviseCreateUsers: migrating ============================================== 
-- create_table(:users) 
NOTICE: CREATE TABLE will create implicit sequence "users_id_seq" for serial column "users.id" 
NOTICE: CREATE TABLE/PRIMARY KEY will create implicit index "users_pkey" for table "users" 
    -> 0.0452s 
-- add_index(:users, :email, {:unique=>true}) 
    -> 0.0151s 
-- add_index(:users, :reset_password_token, {:unique=>true}) 
    -> 0.0309s 
== DeviseCreateUsers: migrated (0.0921s) ===================================== 

rake aborted! 
An error has occurred, this and all later migrations canceled: 

uninitialized constant AddUsernameToUsers 
/home/mike/.rvm/gems/ruby-1.9.3-p125/gems/activesupport-3.2.1/lib/active_support/inflector/methods.rb:229:in `block in constantize' 
/home/mike/.rvm/gems/ruby-1.9.3-p125/gems/activesupport-3.2.1/lib/active_support/inflector/methods.rb:228:in `each' 
/home/mike/.rvm/gems/ruby-1.9.3-p125/gems/activesupport-3.2.1/lib/active_support/inflector/methods.rb:228:in `constantize' 
/home/mike/.rvm/gems/ruby-1.9.3-p125/gems/activesupport-3.2.1/lib/active_support/core_ext/string/inflections.rb:54:in `constantize' 
/home/mike/.rvm/gems/ruby-1.9.3-p125/gems/activerecord-3.2.1/lib/active_record/migration.rb:522:in `load_migration' 
/home/mike/.rvm/gems/ruby-1.9.3-p125/gems/activerecord-3.2.1/lib/active_record/migration.rb:517:in `migration' 
/home/mike/.rvm/gems/ruby-1.9.3-p125/gems/activerecord-3.2.1/lib/active_record/migration.rb:512:in `migrate' 
/home/mike/.rvm/gems/ruby-1.9.3-p125/gems/activerecord-3.2.1/lib/active_record/migration.rb:704:in `block (2 levels) in migrate' 
/home/mike/.rvm/gems/ruby-1.9.3-p125/gems/activerecord-3.2.1/lib/active_record/migration.rb:759:in `call' 
/home/mike/.rvm/gems/ruby-1.9.3-p125/gems/activerecord-3.2.1/lib/active_record/migration.rb:759:in `block in ddl_transaction' 
/home/mike/.rvm/gems/ruby-1.9.3-p125/gems/activerecord-3.2.1/lib/active_record/connection_adapters/abstract/database_statements.rb:190:in `transaction' 
/home/mike/.rvm/gems/ruby-1.9.3-p125/gems/activerecord-3.2.1/lib/active_record/transactions.rb:208:in `transaction' 
/home/mike/.rvm/gems/ruby-1.9.3-p125/gems/activerecord-3.2.1/lib/active_record/migration.rb:759:in `ddl_transaction' 
/home/mike/.rvm/gems/ruby-1.9.3-p125/gems/activerecord-3.2.1/lib/active_record/migration.rb:703:in `block in migrate' 
/home/mike/.rvm/gems/ruby-1.9.3-p125/gems/activerecord-3.2.1/lib/active_record/migration.rb:684:in `each' 
/home/mike/.rvm/gems/ruby-1.9.3-p125/gems/activerecord-3.2.1/lib/active_record/migration.rb:684:in `migrate' 
/home/mike/.rvm/gems/ruby-1.9.3-p125/gems/activerecord-3.2.1/lib/active_record/migration.rb:554:in `up' 
/home/mike/.rvm/gems/ruby-1.9.3-p125/gems/activerecord-3.2.1/lib/active_record/migration.rb:535:in `migrate' 
/home/mike/.rvm/gems/ruby-1.9.3-p125/gems/activerecord-3.2.1/lib/active_record/railties/databases.rake:153:in `block (2 levels) in <top (required)>' 
/home/mike/.rvm/gems/ruby-1.9.3-p125/bin/ruby_noexec_wrapper:14:in `eval' 
/home/mike/.rvm/gems/ruby-1.9.3-p125/bin/ruby_noexec_wrapper:14:in `<main>' 
Tasks: TOP => db:migrate 
(See full trace by running task with --trace)

我99％肯定，我的Gemfile是好的，这就是为什么我没有张贴。

来源

2013-03-04 momchenr

我看到的错误：

uninitialized constant AddUsernameToUsers

，并通过代码搜索，我只看到一个名为AddUsernameToUser类。所以，这是一个开始的地方。

来源

2013-03-04 23:35:20

我做到了，谢谢！现在我得到了这个......我有属于他们的'用户'和'物品'。我已经使用rake create：db：all ...成功创建了数据库，但不知道为什么'items'还没有被创建。我最初使用脚手架在Windows环境中创建了这个脚本。 == AddTitleToItems：migrating =========================================== ===== - add_column（：items，：title，：string） rake中止！发生错误，此次和所有后来的迁移取消： PG ::错误：错误：关系“项目”不存在 – momchenr 2013-03-04 23:39:06

我需要

rake db:schema:load

我是个白痴。

来源

2013-03-05 00:33:19 momchenr

Windows和SQLite3到Ubuntu和PostgreSQL迁移问题

回答

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