app/models/user/omniauth_callbacks.rb

omniauth_callbacks.rb

class User
  module OmniauthCallbacks
    ["slack"].each do |provider|
      define_method "find_or_create_for_#{provider}" do |response|
        uid = response["uid"]
        data = response["info"]

        if identity = Authorization.where("provider" => provider, "uid" => uid).first
          user = identity.user
        elsif user = User.find_by_email(data["email"])
           user.bind_service(response)
           user
        else
          user = User.new_from_provider_data(provider, uid, data)
          if user.save(validate: false)
            user.authorizations << Authorization.new(provider: provider, uid: uid)
            if response["credentials"]["token"].present?
              Rails.logger.warn response["credentials"]["token"]
              user.update(:slack_token => response["credentials"]["token"] )
            end

            team = Team.find_or_create_by(:slack_id => response["extra"]["raw_info"]["team_info"]["team"]["id"])
            user.teams << team
            team.update(:name => response["extra"]["raw_info"]["team_info"]["team"]["name"])

            return user
          else
            Rails.logger.warn("User.create_from_hash 失败，#{user.errors.inspect}")
            return nil
          end
        end
      end
    end

    def new_from_provider_data(provider, uid, data)
      User.new do |user|
        user.email = data["email"]
        user.name = data["name"]
        user.slack_id = uid
        user.password = Devise.friendly_token[0, 20]
      end
    end

  end
end