"Successfully installed rails-4.2.1 ERROR: Could not find a valid gem '4.2.1' (>= 0) in any repo"

Rails
1

“Successfully installed rails-4.2.1
ERROR: Could not find a valid gem ‘4.2.1’ (>= 0) in any repository”

Does anyone recognize this error message or understand what it is saying
I
should do?

2

On Wednesday, April 29, 2015 at 9:41:40 AM UTC+1, Bailey J wrote:

“Successfully installed rails-4.2.1
ERROR: Could not find a valid gem ‘4.2.1’ (>= 0) in any repository”

Does anyone recognize this error message or understand what it is saying I
should do?

That sounds like your Gemfile is actually requesting a gem called
‘4.2.1’
rather than version 4.2.1 of something.

Fred

3

Thanks that helps. So it was probably just the way I passed the
command…

This is what I typed “sudo gem install rails 4.2.1 --no-ri --no-rdoc”,
does
that look funny?

Should I be concerned about the contents of this error message “Could
not
find a valid gem” or is it simply nothing more than what you just said?

What I wanted to do was pass the command with head in it but I don’t
know
the syntax for that and I couldn’t find a reference to it that quickly.
Does anyone know the proper way to pass the command for get head?

4

On 2015-Apr-29, at 11:24 , Bailey J [email protected] wrote:

Thanks that helps. So it was probably just the way I passed the command…

This is what I typed “sudo gem install rails 4.2.1 --no-ri --no-rdoc”, does that
look funny?

You need to have “-v” in front of the version:

sudo gem install rails -v 4.2.1 --no-ri --no-rdoc

Other version specifiers might require quotes to keep the shell from
attempting input/output redirection. E.g.:

sudo gem install rails -v ‘>= 4.2.1’ --no-ri --no-rdoc

-Rob

5

On 2015-Apr-29, at 13:30 , Bailey J [email protected] wrote:

Thanks Rob,

At this point I got the version I wanted even with the incorrect syntax, I can
just leave it as it is?

-Bailey

Yes, of course, the response was basically to point out where your
command had done something that you hadn’t realized that you’d
requested. More of a lesson for the next time when you really might need
to request a version that’s not the “default” that would be installed.

-Rob

6

Thanks Rob,

At this point I got the version I wanted even with the incorrect syntax,
I
can just leave it as it is?

-Bailey