Rails => concatenate integer and string inside model

Question

Is it possible to concatenate an integer and a string inside a model? Something like this:

percent = 50
string = (percent + "%")

Trying this I am getting a Type Error:

TypeError (String can't be coerced into Fixnum): app/models/game.rb:124:in `+'

pranjal0819 · Accepted Answer · 2020-03-07 19:23:38Z

4

You can do it by different ways:

string = "#{number}%" # or number.to_s + "%"
=> "50%"

Or by using number_to_percentage Rails helper:

string = number_to_percentage(number)

pranjal0819

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answered May 24, 2016 at 8:04

Ilya

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3 Comments

number_to_percentage doesn't seem to work: NoMethodError (undefined method `number_to_percentage' for #<Game:0x007fcfb72bd598>):

@Lars, see my answer: only in views, since it is a helper. Or include helpers: include ActionView::Helpers in models.

Ok. I missed this hint. string = "#{number}%" works in my model

Boltz0r · Accepted Answer · 2016-05-24 08:10:01Z

1

percent = 50
percentstring = percent.to_s
string = percentstring + "%"

.to_s = to string

answered May 24, 2016 at 8:10

Boltz0r

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According Ruby style guide better use string interpolation instead of concatenation.

he asked for concatenation :P