Question

我使用的是Ruby 2.2.2和Rails 4.2.3。

我做的命令是：

 rails generate scaffold User name:string email:string
 bundle exec rake db:migrate

我得到的错误是：

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

 undefined method `strong' for #<ActiveRecord::ConnectionAdapters::TableDefinition:0x00000005b72028>/home/clemant/tutorials/test2/db/migrate/20150709221657_create_users.rb:5:in `block in change'

我的迁移文件：

class CreateUsers < ActiveRecord::Migration
  def change
    create_table :users do |t|
      t.string :name
      t.strong :email

      t.timestamps null: false
    end
  end
end

我的database.yml文件是：

# SQLite version 3.x
#   gem install sqlite3
#
#   Ensure the SQLite 3 gem is defined in your Gemfile
#   gem 'sqlite3'
#
default: &default
  adapter: sqlite3
  pool: 5
  timeout: 5000

development:
  <<: *default
  database: db/development.sqlite3

# Warning: The database defined as "test" will be erased and
# re-generated from your development database when you run "rake".
# Do not set this db to the same as development or production.
test:
  <<: *default
  database: db/test.sqlite3

production:
  <<: *default
  database: db/production.sqlite3

知道如何解决这个问题吗？

Answer 1

在您的迁移文件中，您已撰写：t.strong :email。

应该纠正如下：

t.string :email

未定义的方法`strong＆＃39;当尝试捆绑exec rake db：migrate时

1 个答案: