軌S：未定義的方法`symbolize_keys'

Question

我有一個Rails 3.2.12應用程序，但是當我跑rails s，我得到了以下錯誤：connection_specification.rb:45:in 'resolve_hash_connection': undefined method 'symbolize_keys' for #<String:0x00000006c16b40> (NoMethodError)

的connection_specification.rb關注方法：

def resolve_hash_connection(spec) # :nodoc: 
    spec = spec.symbolize_keys # Line 45 

    raise(AdapterNotSpecified, "database configuration does not specify adapter") unless spec.key?(:adapter) 

    begin 
    require "active_record/connection_adapters/#{spec[:adapter]}_adapter" 
    rescue LoadError => e 
    raise LoadError, "Please install the #{spec[:adapter]} adapter: `gem install activerecord-#{spec[:adapter]}-adapter` (#{e.message})", e.backtrace 
    end 

    adapter_method = "#{spec[:adapter]}_connection" 

    ConnectionSpecification.new(spec, adapter_method) 
end 

Answer 1

#symbolize_keys是一種將Hash作爲接收者的方法，但您將其稱爲String。