CODEWITHSUNDEEP
ruby-on-railsruby
Darc Nawg
Darc Nawg

Reputation: 1665

Looping over attributes of model instance

I have an instance people = Person.all and would like to loop over it to get the first_name attribute for each person. I have tried the following:

people.each do |first_name|
  puts #{first_name}
end

How to construct the loop as to output all of the First Names?

Upvotes: 0

Views: 203

Answers (3)

Ajay
Ajay

Reputation: 4251

people = Person.all
puts people.map(&:name).join(' ')

Upvotes: 0

teubanks
teubanks

Reputation: 710

What if, instead of looping, we fetch all the first names in one query?

puts Person.pluck(:first_name).join("\n")

If it needs to be an array of people, this would work too

puts people.map(&:first_name).join("\n")

Upvotes: 0

Ryan K
Ryan K

Reputation: 4053

Redo your code so it looks like this:

people.each do |person|
  puts person.first_name
end

In this code, person is the name of the individual object you are looping over. So calling person.first_name will call the first_name of that individual.

Upvotes: 2

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