Rails迁移不会创建任何东西

Question

我目前正在Michael Hartl的rails教程的8.2.1节中。 我目前正在尝试向我的用户模型添加一个Remember_token来跟踪会话。

当我运行“ rails generate migration add_remember_token_to_users”时，数据库未更新，并且在db / migrate中未创建文件

这就是我在运行“ rails generate migration add_remember_token_to_users”时得到的结果

C:\Sites\sample_app>rails generate migration add_remember_token_to_users
DL is deprecated, please use Fiddle
Usage:
  rails new APP_PATH [options]

Options:
  -r, [--ruby=PATH]                                      # Path to the Ruby bina
ry of your choice
                                                         # Default: C:/RailsInst
aller/Ruby2.0.0/bin/ruby.exe
  -m, [--template=TEMPLATE]                              # Path to some applicat
ion template (can be a filesystem path or URL)
      [--skip-gemfile], [--no-skip-gemfile]              # Don't create a Gemfil
e
  -B, [--skip-bundle], [--no-skip-bundle]                # Don't run bundle inst
all
  -G, [--skip-git], [--no-skip-git]                      # Skip .gitignore file
      [--skip-keeps], [--no-skip-keeps]                  # Skip source control .
keep files
  -O, [--skip-active-record], [--no-skip-active-record]  # Skip Active Record fi
les
  -S, [--skip-sprockets], [--no-skip-sprockets]          # Skip Sprockets files
  -d, [--database=DATABASE]                              # Preconfigure for sele
cted database (options: mysql/oracle/postgresql/sqlite3/frontbase/ibm_db/sqlserv
er/jdbcmysql/jdbcsqlite3/jdbcpostgresql/jdbc)
                                                         # Default: sqlite3
  -j, [--javascript=JAVASCRIPT]                          # Preconfigure for sele
cted JavaScript library
                                                         # Default: jquery
  -J, [--skip-javascript], [--no-skip-javascript]        # Skip JavaScript files

      [--dev], [--no-dev]                                # Setup the application
 with Gemfile pointing to your Rails checkout
      [--edge], [--no-edge]                              # Setup the application
 with Gemfile pointing to Rails repository
  -T, [--skip-test-unit], [--no-skip-test-unit]          # Skip Test::Unit files

      [--rc=RC]                                          # Path to file containi
ng extra configuration options for rails command
      [--no-rc], [--no-no-rc]                            # Skip loading of extra
 configuration options from .railsrc file

Runtime options:
  -f, [--force]                    # Overwrite files that already exist
  -p, [--pretend], [--no-pretend]  # Run but do not make any changes
  -q, [--quiet], [--no-quiet]      # Suppress status output
  -s, [--skip], [--no-skip]        # Skip files that already exist

Rails options:
  -h, [--help], [--no-help]        # Show this help message and quit
  -v, [--version], [--no-version]  # Show Rails version number and quit

Description:
    The 'rails new' command creates a new Rails application with a default
    directory structure and configuration at the path you specify.

    You can specify extra command-line arguments to be used every time
    'rails new' runs in the .railsrc configuration file in your home directory.

    Note that the arguments specified in the .railsrc file don't affect the
    defaults values shown above in this help message.

Example:
    rails new ~/Code/Ruby/weblog

    This generates a skeletal Rails installation in ~/Code/Ruby/weblog.
    See the README in the newly created application to get going.

编辑：运行“目录”的结果

C:\Sites\sample_app>dir
 Volume in drive C is Windows8_OS
 Volume Serial Number is 02F6-CD19

 Directory of C:\Sites\sample_app

08/04/2014  11:15 PM    <DIR>          .
08/04/2014  11:15 PM    <DIR>          ..
08/04/2014  07:49 PM                 0 -e
07/06/2014  07:23 PM    <DIR>          .bundle
07/06/2014  07:19 PM               466 .gitignore
07/06/2014  07:32 PM                 8 .rspec
07/06/2014  07:32 PM               128 .secret
08/04/2014  11:15 PM    <DIR>          app
08/03/2014  07:50 PM    <DIR>          config
07/06/2014  07:19 PM               154 config.ru
08/04/2014  08:25 PM    <DIR>          db
07/06/2014  07:21 PM             1,287 Gemfile
07/06/2014  07:23 PM             5,085 Gemfile.lock
07/06/2014  07:19 PM             1,171 Gemfile~
07/06/2014  07:19 PM    <DIR>          lib
07/06/2014  08:03 PM    <DIR>          log
07/06/2014  07:19 PM    <DIR>          public
07/06/2014  07:19 PM               254 Rakefile
07/06/2014  07:33 PM               185 README.md
07/06/2014  07:19 PM               478 README.rdoc~
08/02/2014  05:03 PM    <DIR>          spec
07/06/2014  07:59 PM    <DIR>          tmp
07/06/2014  07:19 PM    <DIR>          vendor
              11 File(s)          9,216 bytes
              12 Dir(s)  883,421,155,328 bytes free

Answer 1

从错误的外观来看，您实际上不在Rails项目目录中

当您位于Rails项目的根目录时，请尝试运行相同的rails generate命令

编辑

尝试添加一个名为

脚本

Vasseurth链接到您的rails根

在此文件夹中添加一个名为

栏杆

并添加到它

APP_PATH = File.expand_path('../../config/application',  __FILE__)
require File.expand_path('../../config/boot',  __FILE__)
require 'rails/commands'

Answer 2

如果您实际上是在Rails项目目录中，请查看此问题。 它与您的目录几乎完全相同，可以在目录内仍然收到此错误。

Answer 3

原来我放错了bin文件夹。 它包含在我的“ app”文件夹中。 我将bin文件夹剪切/粘贴回应用程序的根目录，现在迁移正常。