How to create a table using ActiveRecord alone

ruby-talk
1

Hi all,

I know I can create a table by running MySql first. I search some
tutorials on google but they all talk about creating a table using
MySql-like database then use ActiveRecord to connect them. I wonder if
it is possible to create a table with ActiveRecord only.

Thanks,

Li

···

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2

You could use migrations. But thats just another way of describing the table.

If you want another approach (defining a model and then letting the abstraction
layer create the required database), you could use datamapper instead[1].

Then, you class will look like this:

  1 class Post
  2 include DataMapper::Resource
  3 property :id, Integer, :serial => true
  4 property :title, String
  5 property :subtitle, String :lazy => [:show]
  6 property :body, Text :lazy => [:show]
  7 property :views, Integer, :lazy => [:show]
  8 property :summary, Text
  9 end

#and

Post.auto_migrate!

will create/migrate your table automatically.

Regards,
Florian

[1]: http://www.datamapper.org

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On Sep 11, 2008, at 5:07 PM, Li Chen wrote:

Hi all,

I know I can create a table by running MySql first. I search some
tutorials on google but they all talk about creating a table using
MySql-like database then use ActiveRecord to connect them. I wonder if
it is possible to create a table with ActiveRecord only.

Thanks,

Li
-- Posted via http://www.ruby-forum.com/\.

3

Florian Gilcher wrote:

If you want another approach (defining a model and then letting the
abstraction
layer create the required database), you could use datamapper
instead[1].

Then, you class will look like this:

[1]: http://www.datamapper.org

I visit the wetsite: http://www.datamapper.org. It says it is not good
under window system. I wonder how good it is under Vista.

···

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