For rails app, how to make flash[:notice] to show a complex sentence?

Question

I want to do something like this:

in controller:

res=1+3
if ...
flash[:notice]="the result is" + res
end

However, I found that it does not work, and the error message is like this:

no implicit conversion of Fixnum into String

I am not sure if the question is downvote, since at least 7 of my classmates think this is extremely useful and believe the question is very clear. But is OK, finally I got the right answer in 3 minutes. — user2049259, Apr 27 '14 at 22:42

score 2 · Accepted Answer · answered Apr 27 '14 at 08:58

2

You need to convert it to the res variable which is an integer to a string:

flash[:notice]="the result is" + res.to_s

answered Apr 27 '14 at 08:58

Zero Fiber

score 1 · Answer 2 · edited May 23 '17 at 11:49

1

I would do it using string interpolation:

flash[:notice] = "the result is #{res}"

Which is better than concatenation (using + ) because:

See this SO question for more details and comparison

edited May 23 '17 at 11:49

Community

answered Apr 27 '14 at 09:39

Nimir

2 Answers2