Ruby on Rails

Railsでexecjs for a list of available runtimesのエラー

Dec 3, 2014

AD:

Vagrantで空のUbuntuを作って、Railsを立ち上げようと思ったら、下記のエラーがでました。

$ rails s
/var/www/html/hoge/vendor/bundle/ruby/2.1.0/gems/execjs-2.2.2/lib/execjs/runtimes.rb:51:in `autodetect': Could not find a JavaScript runtime. See https://github.com/sstephenson/execjs for a list of available runtimes. (ExecJS::RuntimeUnavailable)

1 2	$ rails s /var/www/html/hoge/vendor/bundle/ruby/2.1.0/gems/execjs-2.2.2/lib/execjs/runtimes.rb:51:in `autodetect': Could not find a JavaScript runtime. See https://github.com/sstephenson/execjs for a list of available runtimes. (ExecJS::RuntimeUnavailable)

単純にexecjsはnodejsが必要なので、nodejsを入れて解決です。

sudo apt-get install nodejs

1	sudo apt-get install nodejs

HerokuのPostgresにローカルのpgAdminなので直接アクセス

Nov 30, 2014

AD:

HerokuのPostgresにローカルのpgAdminなどで直接アクセスしたい場合

$ heroku config --app appの名前 | grep HEROKU_POSTGRESQL
HEROKU_POSTGRESQL_色_URL: postgres://ユーザ名:パスワード@サーバ名:ポート/データベース

1 2	$ heroku config --app appの名前 \| grep HEROKU_POSTGRESQL HEROKU_POSTGRESQL_色_URL: postgres://ユーザ名:パスワード@サーバ名:ポート/データベース

Ruby 1.9.3 gem pg error in Ubuntu

Nov 21, 2014

AD:

環境

VagrantでUbuntu14.04
rbenvを使ってRuby 1.9.3-p551
gem pg
で下記のエラーがでました。

Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.

        /home/vagrant/.rbenv/versions/1.9.3-p551/bin/ruby extconf.rb
checking for pg_config... yes
Using config values from /usr/bin/pg_config
You need to install postgresql-server-dev-X.Y for building a server-side extension or libpq-dev for building a client-side application.
You need to install postgresql-server-dev-X.Y for building a server-side extension or libpq-dev for building a client-side application.
checking for libpq-fe.h... *** extconf.rb failed ***
Could not create Makefile due to some reason, probably lack of
necessary libraries and/or headers.  Check the mkmf.log file for more
details.  You may need configuration options.

Provided configuration options:
	--with-opt-dir
	--without-opt-dir
	--with-opt-include
	--without-opt-include=${opt-dir}/include
	--with-opt-lib
	--without-opt-lib=${opt-dir}/lib
	--with-make-prog
	--without-make-prog
	--srcdir=.
	--curdir
	--ruby=/home/vagrant/.rbenv/versions/1.9.3-p551/bin/ruby
	--with-pg
	--without-pg
	--with-pg-dir
	--without-pg-dir
	--with-pg-include
	--without-pg-include=${pg-dir}/include
	--with-pg-lib
	--without-pg-lib=${pg-dir}/lib
	--with-pg-config
	--without-pg-config
	--with-pg_config
	--without-pg_config
/home/vagrant/.rbenv/versions/1.9.3-p551/lib/ruby/1.9.1/mkmf.rb:381:in `try_do': The compiler failed to generate an executable file. (RuntimeError)
You have to install development tools first.
	from /home/vagrant/.rbenv/versions/1.9.3-p551/lib/ruby/1.9.1/mkmf.rb:506:in `try_cpp'
	from /home/vagrant/.rbenv/versions/1.9.3-p551/lib/ruby/1.9.1/mkmf.rb:983:in `block in find_header'
	from /home/vagrant/.rbenv/versions/1.9.3-p551/lib/ruby/1.9.1/mkmf.rb:790:in `block in checking_for'
	from /home/vagrant/.rbenv/versions/1.9.3-p551/lib/ruby/1.9.1/mkmf.rb:284:in `block (2 levels) in postpone'
	from /home/vagrant/.rbenv/versions/1.9.3-p551/lib/ruby/1.9.1/mkmf.rb:254:in `open'
	from /home/vagrant/.rbenv/versions/1.9.3-p551/lib/ruby/1.9.1/mkmf.rb:284:in `block in postpone'
	from /home/vagrant/.rbenv/versions/1.9.3-p551/lib/ruby/1.9.1/mkmf.rb:254:in `open'
	from /home/vagrant/.rbenv/versions/1.9.3-p551/lib/ruby/1.9.1/mkmf.rb:280:in `postpone'
	from /home/vagrant/.rbenv/versions/1.9.3-p551/lib/ruby/1.9.1/mkmf.rb:789:in `checking_for'
	from /home/vagrant/.rbenv/versions/1.9.3-p551/lib/ruby/1.9.1/mkmf.rb:982:in `find_header'
	from extconf.rb:40:in `<main>'


Gem files will remain installed in /var/www/html/hoge/vendor/bundle/ruby/1.9.1/gems/pg-0.13.2 for inspection.
Results logged to /var/www/html/hoge/vendor/bundle/ruby/1.9.1/gems/pg-0.13.2/ext/gem_make.out
An error occurred while installing pg (0.13.2), and Bundler cannot continue.
Make sure that `gem install pg -v '0.13.2'` succeeds before bundling.
</main>

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Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.

/home/vagrant/.rbenv/versions/1.9.3-p551/bin/ruby extconf.rb

checking for pg_config... yes

Using config values from /usr/bin/pg_config

You need to install postgresql-server-dev-X.Y for building a server-side extension or libpq-dev for building a client-side application.

checking for libpq-fe.h... *** extconf.rb failed ***

Could not create Makefile due to some reason, probably lack of

necessary libraries and/or headers. Check the mkmf.log file for more

details. You may need configuration options.

Provided configuration options:

--with-opt-dir

--without-opt-dir

--with-opt-include

--without-opt-include=${opt-dir}/include

--with-opt-lib

--without-opt-lib=${opt-dir}/lib

--with-make-prog

--without-make-prog

--srcdir=.

--curdir

--ruby=/home/vagrant/.rbenv/versions/1.9.3-p551/bin/ruby

--with-pg

--without-pg

--with-pg-dir

--without-pg-dir

--with-pg-include

--without-pg-include=${pg-dir}/include

--with-pg-lib

--without-pg-lib=${pg-dir}/lib

--with-pg-config

--without-pg-config

--with-pg_config

--without-pg_config

/home/vagrant/.rbenv/versions/1.9.3-p551/lib/ruby/1.9.1/mkmf.rb:381:in `try_do': The compiler failed to generate an executable file. (RuntimeError)

You have to install development tools first.

from /home/vagrant/.rbenv/versions/1.9.3-p551/lib/ruby/1.9.1/mkmf.rb:506:in `try_cpp'

from /home/vagrant/.rbenv/versions/1.9.3-p551/lib/ruby/1.9.1/mkmf.rb:983:in `block in find_header'

from /home/vagrant/.rbenv/versions/1.9.3-p551/lib/ruby/1.9.1/mkmf.rb:790:in `block in checking_for'

from /home/vagrant/.rbenv/versions/1.9.3-p551/lib/ruby/1.9.1/mkmf.rb:284:in `block (2 levels) in postpone'

from /home/vagrant/.rbenv/versions/1.9.3-p551/lib/ruby/1.9.1/mkmf.rb:254:in `open'

from /home/vagrant/.rbenv/versions/1.9.3-p551/lib/ruby/1.9.1/mkmf.rb:284:in `block in postpone'

from /home/vagrant/.rbenv/versions/1.9.3-p551/lib/ruby/1.9.1/mkmf.rb:254:in `open'

from /home/vagrant/.rbenv/versions/1.9.3-p551/lib/ruby/1.9.1/mkmf.rb:280:in `postpone'

from /home/vagrant/.rbenv/versions/1.9.3-p551/lib/ruby/1.9.1/mkmf.rb:789:in `checking_for'

from /home/vagrant/.rbenv/versions/1.9.3-p551/lib/ruby/1.9.1/mkmf.rb:982:in `find_header'

from extconf.rb:40:in `<main>'

Gem files will remain installed in /var/www/html/hoge/vendor/bundle/ruby/1.9.1/gems/pg-0.13.2 for inspection.

Results logged to /var/www/html/hoge/vendor/bundle/ruby/1.9.1/gems/pg-0.13.2/ext/gem_make.out

An error occurred while installing pg (0.13.2), and Bundler cannot continue.

Make sure that `gem install pg -v '0.13.2'` succeeds before bundling.

</main>

解決

libpq-dev(UbuntuのPostgres系パッケージ)が入っていないが原因ですよねー

sudo apt-get install libpq-dev

1	sudo apt-get install libpq-dev

Herokuとローカルでgemのgit指定方法でエラーのメモ

Aug 11, 2014

AD:

Gemの指定

ローカルのGem

gem 'activeadmin', :git =&gt; 'git@github.com:gregbell/active_admin.git'

1	gem 'activeadmin', :git => 'git@github.com:gregbell/active_admin.git'

HerokuのGem

gem 'activeadmin', github: 'gregbell/active_admin'

1	gem 'activeadmin', github: 'gregbell/active_admin'

もしローカルで、Herokuの指定方法だと、下記の用にcloneエラーがでてしまいます。

Retrying git clone 'git://github.com/gregbell/active_admin.git' "/home/vagrant/.rbenv/versions/2.0.0-p481/lib/ruby/gems/2.0.0/cache/bundler/git/active_admin-d67faab65e9b74efbc8efb4a777a851e9f78b2ca" --bare --no-hardlinks --quiet due to error (2/3): Bundler::Source::Git::GitCommandError Git error: command `git clone 'git://github.com/gregbell/active_admin.git' "/home/vagrant/.rbenv/versions/2.0.0-p481/lib/ruby/gems/2.0.0/cache/bundler/git/active_admin-d67faab65e9b74efbc8efb4a777a851e9f78b2ca" --bare --no-hardlinks --quiet` in directory /vagrant/??? has failed.

1

Retrying git clone 'git://github.com/gregbell/active_admin.git' "/home/vagrant/.rbenv/versions/2.0.0-p481/lib/ruby/gems/2.0.0/cache/bundler/git/active_admin-d67faab65e9b74efbc8efb4a777a851e9f78b2ca" --bare --no-hardlinks --quiet due to error (2/3): Bundler::Source::Git::GitCommandError Git error: command `git clone 'git://github.com/gregbell/active_admin.git' "/home/vagrant/.rbenv/versions/2.0.0-p481/lib/ruby/gems/2.0.0/cache/bundler/git/active_admin-d67faab65e9b74efbc8efb4a777a851e9f78b2ca" --bare --no-hardlinks --quiet` in directory /vagrant/??? has failed.

地味に悩んだのですが、 git://をhttpsに変換するように、configに追加するようにして、herokuと同じ指定方法で動くようになりました。

git config --global url."https://".insteadOf git://

1	git config --global url."https://".insteadOf git://

nokogiri (1.5.2)が入らない！！件

Feb 27, 2014

AD:

Rails3.1の古い案件の修正が入ったので、環境を構築していたのですが、Nokogiriが1.5.2を入れないと動かない構成でして、苦労しましたのでメモしておきます。

エラー内容

&#65284;bundle install
Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.

        /usr/bin/ruby1.9.1 extconf.rb
extconf.rb:10: Use RbConfig instead of obsolete and deprecated Config.
checking for libxml/parser.h... yes
checking for libxslt/xslt.h... yes
checking for libexslt/exslt.h... yes
checking for iconv_open() in iconv.h... yes
checking for xmlParseDoc() in -lxml2... yes
checking for xsltParseStylesheetDoc() in -lxslt... yes
checking for exsltFuncRegister() in -lexslt... yes
checking for xmlHasFeature()... yes
checking for xmlFirstElementChild()... yes
checking for xmlRelaxNGSetParserStructuredErrors()... yes
checking for xmlRelaxNGSetParserStructuredErrors()... yes
checking for xmlRelaxNGSetValidStructuredErrors()... yes
checking for xmlSchemaSetValidStructuredErrors()... yes
checking for xmlSchemaSetParserStructuredErrors()... yes
creating Makefile

make
compiling xml_io.c
xml_io.c: In function &lsquo;io_read_callback&rsquo;:
xml_io.c:28:3: warning: conversion to &lsquo;int&rsquo; from &lsquo;size_t&rsquo; may alter its value [-Wconversion]
compiling xml_reader.c
compiling xml_element_content.c
compiling xml_entity_decl.c
compiling xml_sax_push_parser.c
compiling xml_node_set.c
xml_node_set.c: In function &lsquo;dealloc_namespace&rsquo;:
xml_node_set.c:9:13: warning: cast discards &lsquo;__attribute__((const))&rsquo; qualifier from pointer target type [-Wcast-qual]
xml_node_set.c:11:13: warning: cast discards &lsquo;__attribute__((const))&rsquo; qualifier from pointer target type [-Wcast-qual]
compiling xml_processing_instruction.c
compiling xml_comment.c
compiling xml_document.c
xml_document.c: In function &lsquo;set_encoding&rsquo;:
xml_document.c:159:12: warning: cast discards &lsquo;__attribute__((const))&rsquo; qualifier from pointer target type [-Wcast-qual]
xml_document.c: In function &lsquo;canonicalize&rsquo;:
xml_document.c:505:15: warning: cast discards &lsquo;__attribute__((const))&rsquo; qualifier from pointer target type [-Wcast-qual]
compiling xml_sax_parser.c
compiling xml_schema.c
compiling xml_attribute_decl.c
compiling html_sax_parser_context.c
compiling xml_dtd.c
compiling xml_encoding_handler.c
compiling xml_element_decl.c
compiling xml_entity_reference.c
compiling html_entity_lookup.c
compiling html_document.c
compiling xml_syntax_error.c
compiling html_element_description.c
html_element_description.c: In function &lsquo;get_description&rsquo;:
html_element_description.c:249:10: warning: cast discards &lsquo;__attribute__((const))&rsquo; qualifier from pointer target type [-Wcast-qual]
compiling xml_document_fragment.c
compiling nokogiri.c
compiling xml_node.c
compiling xml_cdata.c
compiling xml_xpath_context.c
xml_xpath_context.c: In function &lsquo;xpath_generic_exception_handler&rsquo;:
xml_xpath_context.c:189:3: error: format not a string literal and no format arguments [-Werror=format-security]
cc1: some warnings being treated as errors
make: *** [xml_xpath_context.o] Error 1


Gem files will remain installed in /home/vagrant/.bundler/tmp/3761/gems/nokogiri-1.5.2 for inspection.
Results logged to /home/vagrant/.bundler/tmp/3761/gems/nokogiri-1.5.2/ext/nokogiri/gem_make.out
An error occurred while installing nokogiri (1.5.2), and Bundler cannot continue.
Make sure that `gem install nokogiri -v '1.5.2'` succeeds before bundling.

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＄bundle install

Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.

/usr/bin/ruby1.9.1 extconf.rb

extconf.rb:10: Use RbConfig instead of obsolete and deprecated Config.

checking for libxml/parser.h... yes

checking for libxslt/xslt.h... yes

checking for libexslt/exslt.h... yes

checking for iconv_open() in iconv.h... yes

checking for xmlParseDoc() in -lxml2... yes

checking for xsltParseStylesheetDoc() in -lxslt... yes

checking for exsltFuncRegister() in -lexslt... yes

checking for xmlHasFeature()... yes

checking for xmlFirstElementChild()... yes

checking for xmlRelaxNGSetParserStructuredErrors()... yes

checking for xmlRelaxNGSetValidStructuredErrors()... yes

checking for xmlSchemaSetValidStructuredErrors()... yes

checking for xmlSchemaSetParserStructuredErrors()... yes

creating Makefile

make

compiling xml_io.c

xml_io.c: In function ‘io_read_callback’:

xml_io.c:28:3: warning: conversion to ‘int’ from ‘size_t’ may alter its value [-Wconversion]

compiling xml_reader.c

compiling xml_element_content.c

compiling xml_entity_decl.c

compiling xml_sax_push_parser.c

compiling xml_node_set.c

xml_node_set.c: In function ‘dealloc_namespace’:

xml_node_set.c:9:13: warning: cast discards ‘__attribute__((const))’ qualifier from pointer target type [-Wcast-qual]

xml_node_set.c:11:13: warning: cast discards ‘__attribute__((const))’ qualifier from pointer target type [-Wcast-qual]

compiling xml_processing_instruction.c

compiling xml_comment.c

compiling xml_document.c

xml_document.c: In function ‘set_encoding’:

xml_document.c:159:12: warning: cast discards ‘__attribute__((const))’ qualifier from pointer target type [-Wcast-qual]

xml_document.c: In function ‘canonicalize’:

xml_document.c:505:15: warning: cast discards ‘__attribute__((const))’ qualifier from pointer target type [-Wcast-qual]

compiling xml_sax_parser.c

compiling xml_schema.c

compiling xml_attribute_decl.c

compiling html_sax_parser_context.c

compiling xml_dtd.c

compiling xml_encoding_handler.c

compiling xml_element_decl.c

compiling xml_entity_reference.c

compiling html_entity_lookup.c

compiling html_document.c

compiling xml_syntax_error.c

compiling html_element_description.c

html_element_description.c: In function ‘get_description’:

html_element_description.c:249:10: warning: cast discards ‘__attribute__((const))’ qualifier from pointer target type [-Wcast-qual]

compiling xml_document_fragment.c

compiling nokogiri.c

compiling xml_node.c

compiling xml_cdata.c

compiling xml_xpath_context.c

xml_xpath_context.c: In function ‘xpath_generic_exception_handler’:

xml_xpath_context.c:189:3: error: format not a string literal and no format arguments [-Werror=format-security]

cc1: some warnings being treated as errors

make: *** [xml_xpath_context.o] Error 1

Gem files will remain installed in /home/vagrant/.bundler/tmp/3761/gems/nokogiri-1.5.2 for inspection.

Results logged to /home/vagrant/.bundler/tmp/3761/gems/nokogiri-1.5.2/ext/nokogiri/gem_make.out

An error occurred while installing nokogiri (1.5.2), and Bundler cannot continue.

Make sure that `gem install nokogiri -v '1.5.2'` succeeds before bundling.

解決方法

NokogiriとUbuntuで下記のもので入るようになるとはあるのですが、1.5.2はこれでもうまく行かず。。

sudo apt-get install libxml2-dev libxslt1-dev

1	sudo apt-get install libxml2-dev libxslt1-dev

下記のオプションをつけてなんとかインストールできました。

sudo gem install nokogiri -v '1.5.2'  -- --with-cflags="-O2 -pipe -march=native -w"

1	sudo gem install nokogiri -v '1.5.2' -- --with-cflags="-O2 -pipe -march=native -w"

参考サイト

Herokuのrake db:migrateでエラー

Sep 14, 2013

AD:

Herokuにて、Deploy後に、rake migrateするとエラーで進めなかったのでメモしておきます。

状況

$ heroku run rake db:migrate --app appName --trace
rake aborted!
undefined method `[]' for nil:NilClass
/app/vendor/bundle/ruby/2.0.0/gems/activerecord-4.0.0/lib/active_record/tasks/database_tasks.rb:136:in `purge'
/app/vendor/bundle/ruby/2.0.0/gems/activerecord-4.0.0/lib/active_record/railties/databases.rake:361:in `block (3 levels) in <top>'
</top>

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$ heroku run rake db:migrate --app appName --trace

rake aborted!

undefined method `[]' for nil:NilClass

/app/vendor/bundle/ruby/2.0.0/gems/activerecord-4.0.0/lib/active_record/tasks/database_tasks.rb:136:in `purge'

/app/vendor/bundle/ruby/2.0.0/gems/activerecord-4.0.0/lib/active_record/railties/databases.rake:361:in `block (3 levels) in <top>'

</top>

解決するまでにやったこと

Heroku Postgresを使用しているんですが、作成したものを一度削除し、再度作成しなおしました。
この時点で、エラー内容が変わりました。

$ heroku run rake db:migrate --app appName --trace
FATAL: role "roleName" is not permitted to log in (PG::Error)

1 2	$ heroku run rake db:migrate --app appName --trace FATAL: role "roleName" is not permitted to log in (PG::Error)

configで確認するとDATABASE_URLするとHEROKU_POSTGRESQL_カラー_URLが違っていました。

$ heroku config --app appName
DATABASE_URL:                postgres://(AWS&#12398;&#25509;&#32154;)
HEROKU_POSTGRESQL_&#12459;&#12521;&#12540;_URL: postgres://(AWS&#12398;&#25509;&#32154;)
$ heroku pg:promote HEROKU_POSTGRESQL_&#12459;&#12521;&#12540;_URL --app appName

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$ heroku config --app appName

DATABASE_URL: postgres://(AWSの接続)

HEROKU_POSTGRESQL_カラー_URL: postgres://(AWSの接続)

$ heroku pg:promote HEROKU_POSTGRESQL_カラー_URL --app appName

この時点では、結局同じエラー”`[]’ for nil:NilClass”になりました。

最後にheroku restartしてPostgreSQLもrestartして接続ができるようになりましたー
でも、どうして、起きたのかはイマイチ不明。。。。

$ heroku restart --app appName --trace
$ heroku pg:reset --app appName --trace

1 2	$ heroku restart --app appName --trace $ heroku pg:reset --app appName --trace

ほかにもいろいろとPaaSのサービスを使用しているんですが、こういう時にBlackBox化するので、やっかいですねー
ちなみに、ログはpapertrailを使用しているんですが、今回の状況だとログをみても原因が追求できませんでした。

Rails 4.0.0 & Ruby 2.0.0でdebuggerでReadlineのエラー

Aug 9, 2013

AD:

せっかく新しい案件が来たので、Ruby2 & Rails4で開発しているんですが、debuggerでReadlineのエラーがでたので、メモしておきます。

まず環境

Vagrantのubuntu12.10.64bit
rbenv – Ruby 2.0.0p247
rbenv – Rails 4.0.0

エラー内容

$ rails s --debugger
/home/vagrant/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/debugger-1.6.1/lib/ruby-debug/interface.rb:67:in `block (2 levels) in initialize': uninitialized constant Debugger::LocalInterface::Readline (NameError)

1 2	$ rails s --debugger /home/vagrant/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/debugger-1.6.1/lib/ruby-debug/interface.rb:67:in `block (2 levels) in initialize': uninitialized constant Debugger::LocalInterface::Readline (NameError)

エラーを読みかぎりReadlineがないらしいので、Readlineをインストール

Readlineを指定して、rbenvでRubyを入れなおし

$ sudo apt-get install libreadline6 libreadline6-dev
$ CONFIGURE_OPTS="--with-readline-dir=/usr/include/readline" rbenv install 2.0.0-p247
$ rbenv global 2.0.0-p247
$ rbenv rehash

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$ sudo apt-get install libreadline6 libreadline6-dev

$ CONFIGURE_OPTS="--with-readline-dir=/usr/include/readline" rbenv install 2.0.0-p247

$ rbenv global 2.0.0-p247

$ rbenv rehash

Ruby 1.9.3 rails console error by “completion.rb:9:in `require'”

Feb 7, 2013

AD:

I set up Rails Env with ruby 1.9.3p374 & Rails 3.2.11
I tried to use consolce and I got this massage…

Error

$ rails c
/home/vagrant/.rbenv/versions/1.9.3-p374/lib/ruby/1.9.1/irb/completion.rb:9:in `require': cannot load such file -- readline (LoadError)
	from /home/vagrant/.rbenv/versions/1.9.3-p374/lib/ruby/1.9.1/irb/completion.rb:9:in `<top>'
	from /home/vagrant/.rbenv/versions/1.9.3-p374/lib/ruby/gems/1.9.1/gems/railties-3.2.11/lib/rails/commands/console.rb:3:in `require'
	from /home/vagrant/.rbenv/versions/1.9.3-p374/lib/ruby/gems/1.9.1/gems/railties-3.2.11/lib/rails/commands/console.rb:3:in `<top>'
	from /home/vagrant/.rbenv/versions/1.9.3-p374/lib/ruby/gems/1.9.1/gems/railties-3.2.11/lib/rails/commands.rb:38:in `require'
	from /home/vagrant/.rbenv/versions/1.9.3-p374/lib/ruby/gems/1.9.1/gems/railties-3.2.11/lib/rails/commands.rb:38:in `<top>'
	from script/rails:6:in `require'
	from script/rails:6:in `<main>'
</main></top></top></top>

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$ rails c

/home/vagrant/.rbenv/versions/1.9.3-p374/lib/ruby/1.9.1/irb/completion.rb:9:in `require': cannot load such file -- readline (LoadError)

from /home/vagrant/.rbenv/versions/1.9.3-p374/lib/ruby/1.9.1/irb/completion.rb:9:in `<top>'

from /home/vagrant/.rbenv/versions/1.9.3-p374/lib/ruby/gems/1.9.1/gems/railties-3.2.11/lib/rails/commands/console.rb:3:in `require'

from /home/vagrant/.rbenv/versions/1.9.3-p374/lib/ruby/gems/1.9.1/gems/railties-3.2.11/lib/rails/commands/console.rb:3:in `<top>'

from /home/vagrant/.rbenv/versions/1.9.3-p374/lib/ruby/gems/1.9.1/gems/railties-3.2.11/lib/rails/commands.rb:38:in `require'

from /home/vagrant/.rbenv/versions/1.9.3-p374/lib/ruby/gems/1.9.1/gems/railties-3.2.11/lib/rails/commands.rb:38:in `<top>'

from script/rails:6:in `require'

from script/rails:6:in `<main>'

</main></top></top></top>

Add re-readline

$ vi Gemfile
gem 'rb-readline'
$ bundle install

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$ vi Gemfile

gem 'rb-readline'

$ bundle install

Done

Railsでサイト名などを設定する場合

Feb 6, 2013

AD:

設定方法

$ vi config/application.rb
module YourAppName
  class Application 

<h3>&#29872;&#22659;&#12372;&#12392;&#12395;&#22793;&#26356;&#12375;&#12383;&#12356;&#22580;&#21512;</h3>
<pre> vi config/environments/development.rb
config.site_name = "&#12469;&#12452;&#12488;&#21517;"
config.site_url = "localhost:3000"

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$ vi config/application.rb

module YourAppName

class Application

<h3>環境ごとに変更したい場合</h3>

<pre> vi config/environments/development.rb

config.site_name = "サイト名"

config.site_url = "localhost:3000"

参照方法

&lt;h1&gt;&lt;/h1&gt;
@url = YourAppName::Application.config.site_url

1 2	<h1></h1> @url = YourAppName::Application.config.site_url

Done

Country Code for Rails with Migration

Feb 6, 2013

AD:

I want to setup contry code for my Rails app so I searched by google there are some Gem but I just want to make Tables & Model.
I used data from here

Make migratiton file

$ rails g model country name:string alpha_2:string alpha_3:string
invoke  active_record
create    db/migrate/20130206044924_create_countries.rb
create    app/models/country.rb
invoke    rspec
create      spec/models/country_spec.rb

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$ rails g model country name:string alpha_2:string alpha_3:string

invoke active_record

create db/migrate/20130206044924_create_countries.rb

create app/models/country.rb

invoke rspec

create spec/models/country_spec.rb

Add SQL from here

$ vi db/migrate/20130206044924_create_countries.rb
#add data from http://stefangabos.ro/other-projects/list-of-world-countries-with-national-flags/
execute "
INSERT INTO `countries` (`name`, `alpha_2`, `alpha_3`) VALUES
('Afghanistan', 'af', 'afg'),
('Aland Islands', 'ax', 'ala'),
('Albania', 'al', 'alb'),
more...
('Zimbabwe', 'zw', 'zwe')"

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$ vi db/migrate/20130206044924_create_countries.rb

#add data from http://stefangabos.ro/other-projects/list-of-world-countries-with-national-flags/

execute "

INSERT INTO `countries` (`name`, `alpha_2`, `alpha_3`) VALUES

('Afghanistan', 'af', 'afg'),

('Aland Islands', 'ax', 'ala'),

('Albania', 'al', 'alb'),

more...

('Zimbabwe', 'zw', 'zwe')"

and then

$ rake db:migrate

1	$ rake db:migrate

Done.

Railsでexecjs for a list of available runtimesのエラー

HerokuのPostgresにローカルのpgAdminなので直接アクセス

Ruby 1.9.3 gem pg error in Ubuntu

環境

解決

Herokuとローカルでgemのgit指定方法でエラーのメモ

Gemの指定

nokogiri (1.5.2)が入らない！！件

エラー内容

解決方法

Herokuのrake db:migrateでエラー

状況

解決するまでにやったこと

Rails 4.0.0 & Ruby 2.0.0でdebuggerでReadlineのエラー

まず環境

エラー内容

Readlineを指定して、rbenvでRubyを入れなおし

Ruby 1.9.3 rails console error by “completion.rb:9:in `require'”

Error

Add re-readline

Railsでサイト名などを設定する場合

設定方法

参照方法

Country Code for Rails with Migration

Make migratiton file

Add SQL from here

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