插入模型时可变

Question

我有一个包含5个水果的用户模型：

User
  fruit_1
  fruit_2
  fruit_3
  fruit_4
  fruit_5

插入用户模型时是否可以执行for-each？像

@fruits = ['apple','banana','orange','strawberry','blueberry']

user = User.new

@fruits.each do |a, fruit |
  user.fruit_a = fruit <-- I want a to be the actual variable.
end

Answer 1

@fruits.each_with_index do |fruit, i|
  attrib = "fruit_#{i + 1}"
  user.send(attrib) = fruit
end

Answer 2

如果您需要，可以使用以下语法：

user.assign_attributes(Hash[1.upto(@fruits.length).map{|i| ["fruit_#{i}", fruit[i]]}])