传递其他参数Rails的生成模型？ [英] Passing additional parameters to Rails Generate Model?

问题描述

我是新来的Ruby和Rails和我的红宝石1.9.2运行的Rails 3。

I'm new to Ruby and Rails and I'm running Rails 3 on Ruby 1.9.2.

我想创建一个模型，所以我看了看<一href="http://api.rubyonrails.org/classes/ActiveRecord/ConnectionAdapters/TableDefinition.html#method-i-column">documentation得到我想要的表定义，但我不知道我会怎样通过这轨生成模式？

I want to create a model, so I looked at the documentation to get the table definition that I want, but I wonder how I would pass this to rails generate model?

基本上，我想这样的：

title :string, :null => false
details :text, :limit => 30000, :null => false

不过，我只能指定列名和类型，而不是：空或：限

But I can only specify the column name and type, not :null or :limit.

我已经试过轨道模型生成文章（题目：串：空=＆GT;假）（详细信息：文本，：上限=＆GT; 30000，：空=＆GT;假）但只是告诉我，（是一个意外的标记。

I've tried rails model generate Article (title:string, :null => false) (details:text, :limit=>30000, :null => false) but that just tells me that ( is an unexpected token.

如果我刚生成的模型标题：字符串的详细信息：文本，然后将article.rb文件是空的，presumably，因为它是从数据库中读取反正

If I just generate the model with title:string details:text then the article.rb file is empty, presumably because it's read from the DB anyway.

由于一切都在Rails的应该是一个），简单的和b）的魔法，我想知道如果我只是失去了一些东西，并必须通过像哈希生成模式？或者，我真的要手动编辑迁移.RB文件？

As everything in Rails is supposed to be a) simple and b) magic, I'm wondering if I'm just missing something and have to pass something like a hash to generate model? Or do I really have to manually edit the migration .rb file?

推荐答案

是的，你就必须手动编辑该迁移的文件。发电机只是提供了一个起点，它没有做的一切。

Yes you do have to manually edit the migration file for that. The generator just offers a starting point, it does not do everything.

在迁移文件中这样做是很容易的反正。

Doing this in the migration file is very easy anyway.

create_table :articles do |t|
  t.string :title, :null => false
  t.text   :details, :limit => 3000, :null => false
end

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