Why is Rails runner not returning a result?

Question

I am having problems with the Rails runner. When I try to use if, even by command line, it does nothing! it doesn't show error messages, nor results from actions.

For example, if I try

rails runner Credit.count

having defined the model Credit, and the method count as

Credit.first.update_attribute(:estado, "En proceso")

or even simpler tasks, the runner does nothing!

I've tried saying that the environment is development, but nothing works. Does anyone has any insights? Am I doing something wrong?

Edit: I am watching the database, that's the problem, there is no update. I changed the value of the column "estado" for the first element to something other than "En proceso", however, no matter how many times I use the runner, the db doesn't show any change at all.

if you try other rails console command (like `rails console`), all is fine? — Igor Guzak, Aug 29 '14 at 05:22
rails console works. Puts doesn't print anything in console. — Juan P Reyes, Aug 29 '14 at 12:50

score 2 · Answer 1 · answered Aug 29 '14 at 06:30

2

rails runner: runner runs Ruby code in the context of Rails non-interactively

update_attribute : it only return true or false, if you want to output the result, you can use "puts" or "p".

For example,

$ rails r "User.first" #no output, even it will return a user object
$ rails r "puts User.first" # you can use "puts" get the output
#<User:0x007f8a2c76e608>

answered Aug 29 '14 at 06:30

pangpang

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That works as well. Hoever, putting the same code on the model Credit and calling it using rails r does not. – Juan P Reyes Aug 29 '14 at 12:57

score 0 · Answer 2 · answered Aug 29 '14 at 05:49

0

if you just written Credit.first.update_attribute(:estado, "En proceso") in console, you shouldn't have results, but you could see result in DB, for checking if update_attribute really update it you could write as update_attribute! also you could just write:

p Credit.first.update_attribute(:estado, "En proceso") which should print true or false to console

answered Aug 29 '14 at 05:49

Igor Guzak

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The thing is, the db is not being updated, there is no change in the table I am updating. – Juan P Reyes Aug 29 '14 at 12:53
even if you write something like `p 'hello world'` you don't have it in console? – Igor Guzak Aug 29 '14 at 14:44

score 0 · Answer 3 · answered Aug 30 '14 at 01:14

0

Turns out I am an idiot.

First, I had to change the name of the method, calling Credit.count calls the default count method, so I changed it to myMethod.

After that, I was able to use puts function and update the database easily :)

answered Aug 30 '14 at 01:14

Juan P Reyes

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Why is Rails runner not returning a result?

3 Answers3