I have created a new application using Ruby on Rails v4.1.0. When attempting to start a server or console on Windows, I am encountering the following error:
$ rails server
Booting WEBrick
Rails 4.1.0 application starting in development on ....
Exiting
c:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/tzinfo-1.1.0/lib/tzinfo/data_source.rb:199:
in `rescue in create_default_data_source':
No timezone data source could be found. To resolve this, either install
TZInfo::Data (e.g. by running `gem install tzinfo-data`) or specify a zoneinfo
directory using `TZInfo::DataSource.set(:zoneinfo, zoneinfo_path)`.
(TZInfo::DataSourceNotFound)
from c:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/tzinfo-1.1.0/lib/tzinfo/data_source.rb:196:
in `create_default_data_source'
How can I resolve this error?
Resolving the Error
To resolve this error, you'll need to make sure that the tzinfo-data gem is being included in your Gemfile.
First of all, check your Gemfile to see if there is an existing reference to tzinfo-data. If there isn't already a reference, then add the following line:
gem 'tzinfo-data'
You may find that there is already a line like the following:
gem 'tzinfo-data', platforms: [:mingw, :mswin]
If you are using a 64-bit version of Ruby on Windows, then add :x64_mingw to the list of platforms as follows:
gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw]
Alternatively, you can remove the platforms option altogether.
After doing this, run bundle update at the command line to install the tzinfo-data gem and you'll then be able to start your Rails server or console.
Background
The TZInfo::DataSourceNotFound error is being raised by TZInfo, a dependency of the Active Support component of Rails. TZInfo is looking for a source of time zone data on your system, but failing to find one.
On many Unix-based systems (e.g. Linux), TZInfo is able to use the system zoneinfo directory as a source of data. However, Windows doesn't include such a directory, so the tzinfo-data gem needs to be installed instead. The tzinfo-data gem contains the same zoneinfo data, packaged as a set of Ruby modules.
Rails generates a default Gemfile when the application is first created. If the application is created on Windows, then a dependency for tzinfo-data will be included. However (as of Rails version 4.1.0), this omits :x64_mingw from the list of platforms, so doesn't work correctly on 64-bit Windows versions of Ruby. This should be fixed in future Rails releases.
I had to add two gems to get the server to start..
gem 'tzinfo-data'
gem 'tzinfo'
Then bundle install.
Just put this in your app terminal :
gem install tzinfo-data
then change the gemfile line to :
gem 'tzinfo-data', platforms: [:x64_mingw, :mingw, :mswin]
then again in your terminal :
bundle update
That will solve the problem directly.
Add the following line to your Gem File
gem 'tzinfo-data', platforms: [:x64_mingw,:mingw, :mswin]
I had that error when trying to install Redmine in a Docker container:
RAILS_ENV=production bundle exec rake db:migrate
gave me the error because package tzdata was not installed in my Ubuntu image.
apt-get update && apt-get install tzdata -y
did the trick.
Maybe tzinfo is not installed on your system, try to install it:
gem install tzinfo
gem install tzinfo-data
I had this problem too and fixed it by adding BOTH the :x64_mingw to the list of platforms for tzinfo-data, AND the gem 'tzinfo' to the gemfile. Then bundle install.
I ran into this issue on macOs Mojave 10.14.5 and I found out that it was something with how my symlink in macOs wasn't reading the correct provided zone info files.
I was able to track this down with where the files should be using the command
TZInfo::ZoneinfoDataSource.search_path and that provided the output of ["/usr/share/zoneinfo", "/usr/share/lib/zoneinfo", "/etc/zoneinfo"].
I began looking into /usr/share/zoneinfo and there were files available to read. However rails still wasn't finding them, reading them, executing them..? So I then created a symlink from the other file in /usr/share/zoneinfo.default/ to /etc/zoneinfo (the last path TZInfo looks up)
So finally the command that worked for me to fix this issue was ln -s /usr/share/zoneinfo.default /etc/zoneinfo
Hopefully this information is helpful to someone in the future.
so, the gems didn't quite seem to install properly, i had to do the following
gem 'tzinfo-data' gem 'tzinfo'
then
bundle show to see all gems
bundle gem tzinfo will get you the gem's directory
then, go to that directory. you will need to splice tzinfo-data into tzinfo. in the tzinfo-data file, go to.. local_pathname/tzinfo-data-1.2014.5/lib/tzinfo copy all the contents of this directory into... local_pathname/tzinfo-1.2.1/lib/tzinfo (for me this meant copying 'data' the file and 'data' the directory)
then go to local_pathname/tzinfo-1.2.1/lib and open the file, tzinfo, (not the directory) and add this line require 'tzinfo/data'
this was such a pain to figure out
来源：https://stackoverflow.com/questions/23022258/tzinfodatasourcenotfound-error-starting-rails-v4-1-0-server-on-windows