Rewriting SQL query in rails ActiveRecord language?

Is there any way to write this working query :“DISTINCT admins.*”).joins(“LEFT OUTER JOIN
admins_roles ON admins_roles.admin_id =”).joins(“LEFT OUTER JOIN roles ON
admins_roles.role_id =”).where(“roles.resource_type
IS NULL AND = ?”, “manager”)

in Rails ActiveRecord “dialect” ?

I tried ( Admins and Roles are associated w an HMABT association

Admin.joins(:roles).where(:roles => {:resource_type => “”, :name
=> :manager})
this doesn’t work

If I only write :
Admin.joins(:roles).where(:roles => {:name => :manager})
this works, but I get all ;manager with any resource_type

thanks for feedback

just SOLVED it … :resource_type => “” is wrong should
be :resource_type => nil,
I’ll change my glasses