Ruby on Rails

Someone can help me please? I posted on stackoverflow here:

http://stackoverflow.com/questions/36694536/no-implicit-conversion-of-symbol-into-integer-a-error-still-no-solution-for-me

My problem is this:

def new      if params[:authorization].present?        @selected_ids = params[:authorization][:contract_ids]        @authorizations = Authorization.where("contract_number in (?)", @selected_ids)        Authorization.where(id: params[:authorization][:contract_ids]).update_all(value_solve: params[:authorization][:value_solve], situation: 2)      end      @employee = Employee.search_cpf(params[:search_employee_by_cpf])      @refinancing = Refinancing.new

Have no more errors, but dont save on my table authorization, and my query is wrong. This is my console:

Started GET "/refinancings/new?utf8=%E2%9C%93&search_employee_by_cpf11111&authorization%5Bcontract_ids%5D%5B%5D=11&authorization%5Bvalue_solve%5D%5B%5D=89888&authorization%5Bvalue_solve%5D%5B%5D=&authorization%5Bvalue_solve%5D%5B%5D=&commit=Reserve" for 127.0.0.1 at 2016-04-18 10:40:08 -0300  Processing by RefinancingsController#new as HTML    Parameters: {"utf8"=>"✓", "search_employee_by_cpf"=>"1111111111", "authorization"=>{"contract_ids"=>["11"], "value_solve"=>["89888", "", ""]}, "commit"=>"Reserve"}    SQL (0.2ms)  UPDATE "authorizations" SET "value_solve" = '---  - ''89888''  - ''''  - ''''  ', "situation" = 2 WHERE "authorizations"."id" = 11    Employee Load (0.2ms)  SELECT  "employees".* FROM "employees" INNER JOIN "people" ON "people"."id" = "employees"."person_id" WHERE (people.cpf LIKE '%02849112321%')  ORDER BY "employees"."id" ASC LIMIT 1    Person Load (0.1ms)  SELECT  "people".* FROM "people" WHERE "people"."id" = ? LIMIT 1  [["id", 1]]    Authorization Load (0.2ms)  SELECT "authorizations".* FROM "authorizations" WHERE (contract_number in ('11'))    Rendered refinancings/new.html.erb within layouts/application (70.5ms)  Completed 200 OK in 119ms (Views: 85.2ms | ActiveRecord: 1.4ms)

How I said, I think that the error is because "authorizations".id = 11. I haven't id 11, id 11 equal contract_number. The id was to be 1.

Please, make more than 2 weeks that I try but nothing work =(