Rails Associated Table Does not update -

i have 2 models

influencers(id, first_name, ....) influencer_authorizations(id, provider, provider_uid, oauth_token, ....) 

influencers has_many influencer_authorizations

i trying login or sign influencer

  # 1. check if token valid   # 2. check if influencer has authorization facebook_uid   # 3. if no - create new influencer   # 4. if yes - loging in. update token , log him in 

but when old user tries login oauth token not getting updated

facebook controller

def create      @facebook_login = facebookclient.new(facebook_user_token)      if @facebook_login.create       render :show     else       render :error     end    end 

facebook client

class facebookclient   def initialize(token)     @token = token     @client = koala::facebook::api.new(token)   end    attr_reader :influencer    def create     @influencer = new_or_existing_influencer      save_influencer   end    def errors     {       facebook_error: @facebook_errors     }   end    private    attr_reader :client    def new_or_existing_influencer     influencer = influencer.joins(:influencer_authorizations).where(                         :influencer_authorizations => {                           provider: 'facebook',                           provider_uid: provider_uid                         }                       ).first_or_initialize     influencer   end    def save_influencer     set_influencer_details if @influencer.new_record?     set_influencer_authorization_details if @influencer.new_record?      @influencer.influencer_authorizations[0].oauth_token = @token if !influencer.new_record?      @influencer.save   end    def set_influencer_details     @influencer.assign_attributes(         first_name: first_name,         last_name: last_name,         email: email,         bio: bio,         date_of_birth: birthday,         gender: gender,         location: location     )   end    def set_influencer_authorization_details     @influencer.influencer_authorizations.build(         provider: 'facebook',         provider_uid: provider_uid,         oauth_token: @token,         social_account: socialaccount.friendly.find('facebook')     )   end    def basic_information     begin        @basic_information ||= client.get_object("me?fields=id,first_name,last_name,name,bio,about,birthday,email,timezone,gender,location,hometown,currency,locale,devices")      rescue koala::facebook::apierror => exc        @facebook_errors = exc.message     end   end    def provider_uid     basic_information["id"]   end    def first_name     basic_information["first_name"]   end    def last_name     basic_information["last_name"]   end    def name     basic_information["name"]   end    def email     basic_information["email"]   end    def bio     basic_information["bio"]   end    def location     basic_information["location"].present? ? basic_information["location"]["name"] : ""   end    def birthday     basic_information["birthday"].present? ? date.strptime(basic_information["birthday"], "%m/%d/%y") : ""   end    def gender     basic_information["gender"].present? ? basic_information["gender"] : "not_specified"   end  end 

just before saving on inspect oauth token set @influencer.influencer_authorizations[0].oauth_token