Question

我有一本名为“学习Ruby”的书，在rails部分下，逐步介绍了如何创建一个简单的Rails Web应用程序。

它说接近结尾键入命令：

./ script / generate scaffold addressbook addressbook

但是我得到了错误：

错误的参数数量（1对2）

我认为这是因为版本略有差异，但我无法让我的rails应用程序工作，并希望有人可以帮助我吗？

Answer 1

如果您在没有任何参数的情况下运行script/generate scaffold，它将告诉您如何使用它：

$ script/generate scaffold
Usage: script/generate scaffold ModelName [field:type, field:type]

Options:
        --skip-timestamps            Don't add timestamps to the migration file for this model
        --skip-migration             Don't generate a migration file for this model
        --force-plural               Forces the generation of a plural ModelName

Rails Info:
    -v, --version                    Show the Rails version number and quit.
    -h, --help                       Show this help message and quit.

General Options:
    -p, --pretend                    Run but do not make any changes.
    -f, --force                      Overwrite files that already exist.
    -s, --skip                       Skip files that already exist.
    -q, --quiet                      Suppress normal output.
    -t, --backtrace                  Debugging: show backtrace on errors.
    -c, --svn                        Modify files with subversion. (Note: svn must be in path)
    -g, --git                        Modify files with git. (Note: git must be in path)

Description:
    Scaffolds an entire resource, from model and migration to controller and
    views, along with a full test suite. The resource is ready to use as a
    starting point for your RESTful, resource-oriented application.

    Pass the name of the model (in singular form), either CamelCased or
    under_scored, as the first argument, and an optional list of attribute
    pairs.

    Attribute pairs are column_name:sql_type arguments specifying the
    model's attributes. Timestamps are added by default, so you don't have to
    specify them by hand as 'created_at:datetime updated_at:datetime'.

    You don't have to think up every attribute up front, but it helps to
    sketch out a few so you can start working with the resource immediately.

    For example, 'scaffold post title:string body:text published:boolean'
    gives you a model with those three attributes, a controller that handles
    the create/show/update/destroy, forms to create and edit your posts, and
    an index that lists them all, as well as a map.resources :posts
    declaration in config/routes.rb.

    If you want to remove all the generated files, run
    'script/destroy scaffold ModelName'.

Examples:
    `./script/generate scaffold post`
    `./script/generate scaffold post title:string body:text published:boolean`
    `./script/generate scaffold purchase order_id:integer amount:decimal`

尝试让我的第一个Rails应用程序运行时出错

1 个答案: