Not equals in mongo mapper

问题

I'm trying to run a query where I want to ignore records with a certain email address...

@foo = Bar.all(:email => 'xxx') <--- Except I want to negate where this email address exists.

Please let me know how I can do it.

Thanks!

回答1:

Or

@foo = Bar.all(:email.ne => 'xxx')

回答2:

Try:

@foo = Bar.all(:email => {"$ne" => "xxx"})

回答3:

@foo = Bar.all(:email => {"$ne" => "xxx"})

来源：https://stackoverflow.com/questions/3541528/not-equals-in-mongo-mapper