Variable when inserting into model

Question

I have a user model with 5 fruits:

User
  fruit_1
  fruit_2
  fruit_3
  fruit_4
  fruit_5

Is it possible to do a for-each when inserting into the user model? Like

@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

This is pretty confusing, could you expand on your question a bit please? — Matt
– Matt, Commented May 31, 2013 at 20:16
So are you trying to loop through fruit_1 to fruit_5 and assign them within a loop? — Noz
– Noz, Commented May 31, 2013 at 20:22
@cyle I have a array with 5 object which I want to assign to the fruits within the user model. — Philip
– Philip, Commented May 31, 2013 at 20:24

Mori · Accepted Answer · 2013-05-31 20:24:40Z

3

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

answered May 31, 2013 at 20:24

Mori

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2 Comments

benams Over a year ago

That's the way. The "send" function executes the string it gets as an parameter as a command. BTW, having fruit1, fruit2 (...) seems like a bad design, but it's not the issue here :)

lurker Over a year ago

Yep, or simply, user.send("fruit_#{i+1}") = fruit inside the loop (cutting out the middle man ;)).

Noz · Accepted Answer · 2013-05-31 20:41:33Z

1

Here's an alternate syntax if you want:

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

answered May 31, 2013 at 20:41

Noz

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