rails bug 如果表字段有名字为type的bug

  今天在做开发的时候遇到一个莫名奇妙的问题，后来才发现是表中有字段名字叫type引起的，还是在http://dev.rubyonrails.org/ticket/7998 上发现原来是rails的一个bug，发出来，免得大家遇到相同的问题。

Ticket #7998 (new defect)

Opened 2 months ago

Last modified 2 weeks ago

Scafford should detect & report error when DB field named 'type'

Reported by: Assigned to: Priority: Milestone: Component: Version: Severity: Keywords: Cc:  

dlamet	core
normal	1.x
ActiveRecord	edge
normal	field name error tINTEGER

Description ¶

When generating a scaffold, it will accept a table that has a field named type. This causes a crypic error inside base.rb:

compile error c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.15.3/lib/active_record/base.rb:1358: syntax error, unexpected tINTEGER Object::1

It would save a lot of people (like me) a lot of time if the scaffold code would fail with a useful error about the field name being 'type'.

Change History

05/22/07 00:51:47 changed by mlopes ¶

I would like to second that. I just came across the exact same problem and for a newbie it can be really a cumbersome issue.

A warning should be used whenever a field name type exists. Better yet, it shouldn't be a problem at all.

05/29/07 20:37:33 changed by josh ¶

• type changed from enhancement to defect.

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• 2007-06-14 17:51
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3 楼 hozaka 2007-06-15  

好像通过 product.attributes[:type] 可以访问

2 楼 dogstar 2007-06-15  

type记得是rails数据库魔法的一个小tricky，你用来干其他事情了。估计就出错了。

1 楼 liubin 2007-06-14  

像type和name之类的有可能是关键字的词还是少用为好。