Rails：模型方法与保存有关

Question

I have a text_area named answer_choices in my form that's used for inputting answers (separated by a line break):

Some answer
Another answer
Yet another

So when a users submits the form, I parse answer_choices out into individual answers for input into the database using answer_choices.split(/\\r\\n/)

Then, when they edit the form, I reassemble those individual answers using this method:

I have the following method in my Question model:

def answer_choices
  string = ''

  answers.each do |answer|
    string += "#{answer.text.to_s}\n"
  end

  string.strip
end

That lets me just do <%= f.text_area :answer_choices %> in my view and I get the answers separated by line breaks. Great.

The problem is that when I submit the form again (to update the records), that little answer_choices.split(/\\r\\n/) bit seems to be calling that custom method instead of taking any new data from the form field and thus just re-adds the same data from before.

So how can I have my custom method for the form output?

Answer 1

为了避免调用自定义方法，应使用属性哈希：

self.attributes['answer_choices'].split(/\r\n/)