Question

I’m new to RoR; I want create the following statement. I’ve an array; I want that controller return false if all array elements are not equal to a variable value.This is the code

def check_warehouse(asset,serial)
  wh = Warehouse.where(["(asset = ? and serial = ?) OR (asset = ?) OR (serial= ?)",asset,serial,asset,serial])
  return false if wh.count > 1
  return false if
  wh.each do |wh|
    wh.position_id != session[:position_id]
  end
end

but it doesn’t works!why?

Moreover, can you suggest me a plugin or gem running on Rails 3.1 for generate pdf from RoR datas?
Thank you all

Answer 1

Try smth like this:

def check_warehouse(asset,serial)
  wh = Warehouse.where(["(asset = ?) OR (serial= ?)",asset,serial]) # first condition was just extra
  return false if wh.detect {|wh| wh.position_id != session[:position_id] }
end

I removed return false if wh.count > 1 because there’s no sense to check the array if you return if it has more than 1 element. Please tell me if I misunderstood you

UPD

Actually you can do that in the db:

def check_warehouse(asset,serial)
  Warehouse.where(
    ["(asset = ? OR serial= ?) AND NOT position_id = ?", asset, serial, session[:position_id]]
  ).count.zero?
end