#問題点
ruby on rails の勉強をしているのですが、はじめにhttp://localhost:3000/の実行には成功しました。しかし次のステップのhttp://localhost:3000/users/へのアクセスがうまく行きません
端末上でユーザに関するsampleを自動生成しようとしたのですが実行結果が以下の様になってしまいます
端末
~/rails/sample$ bin/rails generate sample user name:string address:string age:integer
Ignoring bindex-0.5.0 because its extensions are not built. Try: gem pristine bindex --version 0.5.0
Ignoring bootsnap-1.3.2 because its extensions are not built. Try: gem pristine bootsnap --version 1.3.2
Ignoring byebug-10.0.2 because its extensions are not built. Try: gem pristine byebug --version 10.0.2
Ignoring ffi-1.9.25 because its extensions are not built. Try: gem pristine ffi --version 1.9.25
Ignoring msgpack-1.2.4 because its extensions are not built. Try: gem pristine msgpack --version 1.2.4
Ignoring nio4r-2.3.1 because its extensions are not built. Try: gem pristine nio4r --version 2.3.1
Ignoring nokogiri-1.8.5 because its extensions are not built. Try: gem pristine nokogiri --version 1.8.5
Ignoring pg-1.1.3 because its extensions are not built. Try: gem pristine pg --version 1.1.3
Ignoring puma-3.12.0 because its extensions are not built. Try: gem pristine puma --version 3.12.0
Ignoring sqlite3-1.3.13 because its extensions are not built. Try: gem pristine sqlite3 --version 1.3.13
Ignoring websocket-driver-0.7.0 because its extensions are not built. Try: gem pristine websocket-driver --version 0.7.0
Traceback (most recent call last):
22: from /var/lib/gems/2.5.0/gems/spring-2.0.2/bin/spring:49:in <main>' 21: from /var/lib/gems/2.5.0/gems/spring-2.0.2/lib/spring/client.rb:30:in
run'
20: from /var/lib/gems/2.5.0/gems/spring-2.0.2/lib/spring/client/command.rb:7:in call' 19: from /var/lib/gems/2.5.0/gems/spring-2.0.2/lib/spring/client/server.rb:9:in
call'
18: from /home/yuya/.rbenv/versions/2.5.1/lib/ruby/2.5.0/rubygems/core_ext/kernel_require.rb:59:in require' 17: from /home/yuya/.rbenv/versions/2.5.1/lib/ruby/2.5.0/rubygems/core_ext/kernel_require.rb:59:in
require'
16: from /var/lib/gems/2.5.0/gems/spring-2.0.2/lib/spring/server.rb:9:in <top (required)>' 15: from /home/yuya/.rbenv/versions/2.5.1/lib/ruby/2.5.0/rubygems/core_ext/kernel_require.rb:59:in
require'
14: from /home/yuya/.rbenv/versions/2.5.1/lib/ruby/2.5.0/rubygems/core_ext/kernel_require.rb:59:in require' 13: from /var/lib/gems/2.5.0/gems/spring-2.0.2/lib/spring/commands.rb:4:in
<top (required)>'
12: from /var/lib/gems/2.5.0/gems/spring-2.0.2/lib/spring/commands.rb:33:in <module:Spring>' 11: from /home/yuya/.rbenv/versions/2.5.1/lib/ruby/2.5.0/rubygems/core_ext/kernel_require.rb:59:in
require'
10: from /home/yuya/.rbenv/versions/2.5.1/lib/ruby/2.5.0/rubygems/core_ext/kernel_require.rb:59:in require' 9: from /var/lib/gems/2.5.0/gems/bundler-1.17.1/lib/bundler/setup.rb:20:in
<top (required)>'
8: from /var/lib/gems/2.5.0/gems/bundler-1.17.1/lib/bundler.rb:107:in setup' 7: from /var/lib/gems/2.5.0/gems/bundler-1.17.1/lib/bundler/runtime.rb:20:in
setup'
6: from /var/lib/gems/2.5.0/gems/bundler-1.17.1/lib/bundler/runtime.rb:108:in block in definition_method' 5: from /var/lib/gems/2.5.0/gems/bundler-1.17.1/lib/bundler/definition.rb:226:in
requested_specs'
4: from /var/lib/gems/2.5.0/gems/bundler-1.17.1/lib/bundler/definition.rb:237:in specs_for' 3: from /var/lib/gems/2.5.0/gems/bundler-1.17.1/lib/bundler/definition.rb:170:in
specs'
2: from /var/lib/gems/2.5.0/gems/bundler-1.17.1/lib/bundler/spec_set.rb:85:in materialize' 1: from /var/lib/gems/2.5.0/gems/bundler-1.17.1/lib/bundler/spec_set.rb:85:in
map!'
/var/lib/gems/2.5.0/gems/bundler-1.17.1/lib/bundler/spec_set.rb:91:in `block in materialize': Could not find nokogiri-1.8.5 in any of the sources (Bundler::GemNotFound)
どのようにすればエラーが解決されるのでしょうか?
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