ruby-on-rails – 如何获取Linkedin用户数据？

基本档案(工作正常)

client = get_client
profile = client.profile(:fields => ["first-name","last-name","maiden-name","formatted-name",:headline,:location,:industry,:summary,:specialties,"picture-url","public-profile-url"])

经验和职位：

client = get_client
positions = client.profile(:fields => [:positions]).positions.all

对于教育：

client = get_client
educations = client.profile(:fields => [:educations]).educations.all

而get_client

def get_client
linkedin_oauth_setting = LinkedinOauthSetting.find_by_user_id(current_user.id)
client = LinkedIn::Client.new('aaadad','dadada',@@config)
client.authorize_from_access(linkedin_oauth_setting.atoken,linkedin_oauth_setting.asecret)
client
end

对于范围我设置：

:request_token_path => '/uas/oauth/requestToken?scope=r_fullprofile'

我能够获得基本个人资料信息,但不能获得其他信息.对于其他领域,我变空了[].我在这做错了什么？