Rails - Mar 2008 - how can i know type of attribute with active record

Hello,

In my database, I have a table "products" with attributes :
- id
- title ->string
- desc -> text

I use active record, but I don''t know why recover the type of this
attribute with active record?

I try attributes_before_type_cast but I don''t see the type

Can you help me?

Excuse for my english (I''am a young student french)
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Richard Vincent wrote:
> Hello,
>
> In my database, I have a table "products" with attributes :
> - id
> - title ->string
> - desc -> text
>
> I use active record, but I don''t know why recover the type of this
> attribute with active record?
>
> I try attributes_before_type_cast but I don''t see the type
>
> Can you help me?
>
> Excuse for my english (I''am a young student french)
>   
Either of these should get you what you want.

MyClass.columns_hash[''column_name''].type

@instance_of_my_class.column_for_attribute(:column_name).type


Although, I should mention that in nearly two years of developing in 
Rails professionally, I don''t think I''ve ever needed to
retrieve this
information in any of my apps.   Are you sure that what you really want 
isn''t the ruby class of the value (eg.   @instance.column_name.class 
),
or something else?

-- 
http://www.5valleys.com/
http://www.workingwithrails.com/person/8078


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Ok thanks for your example, it''s goog for my app

Other question :
In my database, I have a table "line_items" with attributes :
- id -> integer
- product_id -> integer
and I have a foreign key (product-id references table product)

It is possible to recover the class of attribute product_id?
In my app I list object in my database (like phpMyAdmin) and if a 
foreign key I want to link to the object reference by this foreign key.

For example, in "line_items", list object of this table and I want a 
link in "product_id" to this product

I don''t know if it''s possible???



Jon Garvin wrote:
> Richard Vincent wrote:
>> I try attributes_before_type_cast but I don''t see the type
>>
>> Can you help me?
>>
>> Excuse for my english (I''am a young student french)
>>   
> Either of these should get you what you want.
> 
> MyClass.columns_hash[''column_name''].type
> 
> @instance_of_my_class.column_for_attribute(:column_name).type
> 
> 
> Although, I should mention that in nearly two years of developing in
> Rails professionally, I don''t think I''ve ever needed to
retrieve this
> information in any of my apps.   Are you sure that what you really want
> isn''t the ruby class of the value (eg.  
@instance.column_name.class  ),
> or something else?
> 
> --
> http://www.5valleys.com/
> http://www.workingwithrails.com/person/8078
-- 
Posted via http://www.ruby-forum.com/.

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