geolocation - Rails gem - geoipcity is not being included in the application -

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i installed geoip_city gem, , tested gem in irb... when using gem in application error

uninitialized constant applicationcontroller::geoipcity

i guessed because did not add line

require geoip_city

so tried adding line function used code in, got error

no such file -- geoip_city

please help.

have require rubygems before ?

require 'rubygems' require 'geoip_city'

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