Question

我有一个rails项目，我想添加一个新表，并在一个已经在项目中的表中进行更改。从终端和现有rails项目的文件夹里面我写下：

Mini-1:arbinet anna$ rails generate model PriceRate profitable_routes_id:int normalized_rate:float normalized_payout:float margin:float old_rate:float old_payout:float old_margin:float

这也适用于迁移：

Mini-1:arbinet anna$ rails generate migration ChangeColumnsFromProfitableRoutes

但对于两者我得到这个消息：

 Usage:
  rails new APP_PATH [options]

Options:
  -r, [--ruby=PATH]              # Path to the Ruby binary of your choice
                                 # Default: /Users/anna/.rvm/rubies/ruby-1.9.3-p286/bin/ruby
  -b, [--builder=BUILDER]        # Path to a application builder (can be a filesystem path or URL)
  -m, [--template=TEMPLATE]      # Path to an application template (can be a filesystem path or URL)
      [--skip-gemfile]           # Don't create a Gemfile
      [--skip-bundle]            # Don't run bundle install
  -G, [--skip-git]               # Skip Git ignores and keeps
  -O, [--skip-active-record]     # Skip Active Record files
  -S, [--skip-sprockets]         # Skip Sprockets files
  -d, [--database=DATABASE]      # Preconfigure for selected database (options: mysql/oracle/postgresql/sqlite3/frontbase/ibm_db/sqlserver/jdbcmysql/jdbcsqlite3/jdbcpostgresql/jdbc)
                                 # Default: sqlite3
  -j, [--javascript=JAVASCRIPT]  # Preconfigure for selected JavaScript library
                                 # Default: jquery
  -J, [--skip-javascript]        # Skip JavaScript files
      [--dev]                    # Setup the application with Gemfile pointing to your Rails checkout
      [--edge]                   # Setup the application with Gemfile pointing to Rails repository
  -T, [--skip-test-unit]         # Skip Test::Unit files
      [--old-style-hash]         # Force using old style hash (:foo => 'bar') on Ruby >= 1.9

Runtime options:
  -f, [--force]    # Overwrite files that already exist
  -p, [--pretend]  # Run but do not make any changes
  -q, [--quiet]    # Suppress status output
  -s, [--skip]     # Skip files that already exist

Rails options:
  -h, [--help]     # Show this help message and quit
  -v, [--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.

我并不知道为什么，但是当我创建其他表时，它正在工作。

Answer 1

您应该从应用程序的正确docroot（文件夹）中调用'rails'命令。

因此，如果你的应用程序位于/pub/www/mycoolapp/，你应该执行：cd /pub/www/mycoolapp/并从那里运行rails命令

Answer 2

稍后一点点，但也许你们中的任何人都可能遇到这个问题。

在app根文件夹中运行此命令

bundle exec rake rails:update:bin

享受编码!!

我无法在rails中生成迁移模型

2 个答案: