Stop rails console from printing out the object at the end of a loop
Solution 1
If you don't want to disable the echo in general you could also call multiple expressions in one command line. Only the last expression's output will be displayed.
big_result(input); 0
Solution 2
Call conf.echo = false
and it will not print the return value. This works for any irb session, not just Rails console.
In case you want to make it permanent, add it to your irb config.
echo 'IRB.conf[:ECHO] = false' >> $HOME/.irbrc
Solution 3
To temporarily stop the console from printing the return values you can issue a nil
statement at the end of your loop or function, but before pressing the return.
record.each do |r|
puts r.properties
end; nil
Or it can be a number too, if you want to reduce typing. But it can be confusing in scenarios, which I can't think of.
record.each do |r|
puts r.properties
end; 0
Solution 4
This frustrated me a lot, because I was using pry-rails
gem, some solutions wouldn't work for me.
So here's what worked in 2 steps:
- Simply adding
;
to the end of the very last command will be enough to silence the output from printing. - It may still print the sql that was executed. So to silence that, surround it with
ActiveRecord::Base.logger.silence do
# code here
end
Example
If you want to run this
User.all do |user|
puts user.first_name
end
then this will ensure nothing else prints to screen:
ActiveRecord::Base.logger.silence do
User.all do |user|
puts user.first_name
end
end;
(don't forget the ;
at the very end)
dsp_099
Updated on February 22, 2021Comments
-
dsp_099 about 3 years
If I, say, loop through all the instances of a given model and output something from each, at the end, irb will still print the entire object.
If the object ends up taking hundreds of lines, it'll be a long way up before I see what I was actually looking for. Is there a way to disable this in the rails console?
-
dsp_099 over 11 yearsthis is actually what I wanted.
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Peter Berg almost 10 yearsWhat would you do if you wanted to have this always be the case by default?
-
lulalala almost 10 years@Accipheran I guess putting it in the Rails initializers would work.
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Peter Berg almost 10 yearsThanks for the response, I actually found that just throwing the line
IRB.conf[:ECHO] = false
, in my .irbrc file took care of it. That of course also turns of the echo in all my irb sessions, but I'm okay with that. -
sickrandir almost 6 yearsyou are the best!
-
nroose almost 4 yearsI often do
big_result(input); nil
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stevec over 3 yearsIs there a way to set it temporarily (in just the current console session)?
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stevec over 3 yearsRunning
conf.echo = false
from the rails console givesNameError: undefined local variable or method 'conf' for main:Object from (pry):6:in '<main>'
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lulalala over 3 years@stevec I wonder if it is because you are using pry.
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stevec about 3 years@lulalala I just checked against an app that has pry-rails gem and one that doesn't, and running
conf.echo = false
in the rails console worked in the app that doesn't have it and didn't work in the that has pry-rails. I wonder if there's an equivalent for apps using pry?