Before Action on Import from CSV

问题

I have a simple CSV import where the provided file is already broken (UTF characters) (German).

e.g.: The list has :

G%C3%B6tterbote

where as the right name should be

Götterbote

I'm trying to force the encoding when importing the CSV.

My Import Action

  def import
    Player.import(params[:file])
    redirect_to players_path, notice: "Players Imported successfully"
  end

My Import Method

  def self.import(file)
    SmarterCSV.process(file.path) do |row|
      Player.create(row.first)
    end
  end

I found out that this converts the String successfully, but couldn't implement it successfully:

 u = "G%C3%B6tterbote"
   => "G%C3%B6tterbote" 

 u1 = CGI::unescape(u).force_encoding('UTF-8')
    => "Götterbote"  

So basically i need something like a before_action (i guess)..

回答1:

You don't need a before action.

You need a pre-prossessor, well actually you need to pre-prossess yourself.

Your CSV comes with columns. Column 0, 1, 2, 3 etc (since you don't use headers).

So, for your text columns, let's call them for the sake of the example columns 1, 3, 5.

def self.import(file)
    text_cols=[1,3,5] #for example
    SmarterCSV.process(file.path) do |row|
        text_cols.each do |column|
            row[column]=CGI::unescape(row[column]).force_encoding('UTF-8')
        end
        Player.create(row)
    end
end

Or simply, for your particular case:

def self.import(file)
    SmarterCSV.process(file.path) do |row|
        row.first=CGI::unescape(row.first).force_encoding('UTF-8')
        Player.create(row.first)
    end
end

来源：https://stackoverflow.com/questions/23029367/before-action-on-import-from-csv