Rails iteration variable inside variable in seed.rb

Question

Within my seed.rb I'm populating 4 columns with text data from one title-1.txt file.

title  = File.read(File.join(Rails.root, '/features/support/titles/title-1.txt'))  

1.upto(4) do |i|
  PressRelease.create(
    :title => title
  )
end

I want to populate each column with different content from different txt files (title-1.txt, title-2.txt, ...)

I know I can make this:

1.upto(4) do |i|
  PressRelease.create(
    :title => File.read(File.join(Rails.root, '/features/support/titles/title-' + "#{i}" +'.txt'))
  )
end

To make it short I've tried changing the title variable into this:
(notice the title-"#{i}")

title  = File.read(File.join(Rails.root, '/features/support/titles/title-' + "#{i}" + '.txt'))

But I get this error:
Undefined local variable or method `i' for main:Object

Any tip how to make a reusable and short variable that let's me use it in iterations?

-- UPDATE --
This post doesn't have a complete solution, from the answer of @Paul Fioravanti I got an alternate method to shorten the code. The url must be stored in the variable without the File.open methods, like this:

title_url  = '/features/support/titles/title-' + '%s' + '.txt'  

1.upto(4) do |i|
  PressRelease.create(
    :title => File.read(File.join(Rails.root, "#{title_url %i}"))
  )
end

Community · Accepted Answer · 2017-05-23 11:48:53Z

1

How about this solution I got from this StackOverflow thread, so you can keep the variable short inside your loop, and don't need to define the numbered file when you define the title variable:

title  = File.read(File.join(Rails.root, '/features/support/titles/title-' + '%s' + '.txt'))
1.upto(4) do |i|
  PressRelease.create(
    :title => title % i
  )
end

edited May 23, 2017 at 11:48

CommunityBot

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answered Dec 25, 2012 at 1:50

Paul Fioravanti

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2 Comments

Ricardo Castañeda Over a year ago

Thanks, I get this message: No such file or directory - /directories/title-%s.txt. But your method works when I store the url in a variable without the File functions. So in the create method I have this| :title => File.read(File.join(Rails.root, "#{title_url %i}")), I'll wait some time, if there is not a better answer I'll set yours as accepted.

Paul Fioravanti Over a year ago

Nice catch...should have known that. If you end up choosing this solution, please edit your question to post the final answer so that others don't need to accidentally use non-tested code in their solutions :-)

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