Ruby - $or is not working in mongo local server, but working in online server

DdFbcrawlLinks.where(:$or => [{:feedtype => "news"},{:feedtype开发者_开发技巧 => "wall"}]).all

DdFbcrawlLinks is my model and it has the values. But unfortunately the abouve line is returning empty array

But the same code is working fine in online server

Please help

In your specific query, using $in would be better

DdFbcrawlLinks.where(:feedtype.in=>["news","wall"]).all

More: http://mongoid.org/docs/querying/criteria.html