Thanks for your help everyone. I ended up using Chronic Duration gem.
https://github.com/hpoydar/chronic_duration On Sunday, September 22, 2013 3:58:58 PM UTC+8, Colin Law wrote: > > On 20 September 2013 08:30, Fai Wong <wong...@gmail.com <javascript:>> > wrote: > > If I store 1.month as a string in the database, how do I convert > "1.month" > > into 1.month? > > > > This way I can use the "1.month" value stored in database to perform the > > following calculation. > > > > Time.now + 1.month > > If you really feel you need to do this then you can store "1.month" as > a string and use eval > > 1.9.3p194 :007 > delta = "1.month" > => "1.month" > 1.9.3p194 :008 > Time.now > => 2013-09-22 08:52:13 +0100 > 1.9.3p194 :009 > Time.now + eval( delta ) > => 2013-10-22 08:52:23 +0100 > > However if you do this be /very/ careful about what can get into the > database as arbitrary code can be executed using eval and conceivably > your machine could be hacked. I DO NOT recommend that you do this. > If your requirement is for a delta with values such as 1 month 3 weeks > and so on, then I suggest having two fields, one for the quantity and > an enumerated value for the period (month, week and so on). Then work > it out in code. Less efficient but /much/ safer. > > Colin > > > > > -- > > You received this message because you are subscribed to the Google > Groups > > "Ruby on Rails: Talk" group. > > To unsubscribe from this group and stop receiving emails from it, send > an > > email to rubyonrails-ta...@googlegroups.com <javascript:>. > > To post to this group, send email to > > rubyonra...@googlegroups.com<javascript:>. > > > To view this discussion on the web visit > > > https://groups.google.com/d/msgid/rubyonrails-talk/a19f9925-f725-4cd5-9dfd-6c8c4b897bd6%40googlegroups.com. > > > > For more options, visit https://groups.google.com/groups/opt_out. > -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To unsubscribe from this group and stop receiving emails from it, send an email to rubyonrails-talk+unsubscr...@googlegroups.com. To post to this group, send email to rubyonrails-talk@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/rubyonrails-talk/9273b7f1-c2bc-4776-9ab1-25f77341af30%40googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
