when I tried to start Server with command rails -s that throw an error:
Could not find gem 'therubyracer x86-mingw32' in any of the gem sources listed i
n your Gemfile.
Run bundle install to install missing gems.
I also try with
gem install
gem update ...
but no effect
my gem file:
gem 'therubyracer', group: :production
I don't know why that can not run! but run with another project is OK.
how can I resolve this?
You can run bundle install --without production to skip that gem being installed for development.
In my Gemfile I have: mysql2 (0.4.4)
I got this error when launching my Rails server: Specified 'mysql2' for database adapter, but the gem is not loaded. Add gem 'mysql2' to your Gemfile (and ensure its version is at the minimum required by ActiveRecord).
I read and searched some threads on this website. The recommendations were to downgrade mysql2
"version 0.3.18 of mysql2 by adding this line to your gemfile:
gem 'mysql2', '~> 0.3.20'"
When I did this I tried to rerun bundle install and I got this error.
[!] There was an error parsing Gemfile: unterminated string meets end of file. Bundler cannot continue.
# from /Users/john-michaelnalettenalette/simple_cms/Gemfile:7
# -------------------------------------------
# # Use mysql as the database for Active Record
gem ‘mysql2’, `~> 0.3.20’
# # Use SCSS for stylesheets
# -------------------------------------------
Any Ideas would be appreciated.
You started a string which you didn't end at the end of this line :
gem 'mysql2', '~> 0.3.20'"
Change it to this:
gem 'mysql2', '~> 0.3.20'
I had the same error on rails v 4.2.10. Ubuntu 18:10
Installing mysql2 0.3.21 with native extensions
Gem::Ext::BuildError: ERROR: Failed to build gem native extension.
the solution suggested in the error message was:
libmysqlclient is missing. You may need to 'apt-get install libmysqlclient-dev'
or 'yum install mysql-devel', and try again.
this worked!
note: I am bundling an old app which depended on mysql, which is not yet installed on my machine. installing mysql may also have solved my issue.
I have referred to several different sources in order to try to push Heroku..
the error code I'm getting is:
An error occurred while installing sqlite3 (1.3.7), and Bundler cannot continue.
Make sure that `gem install sqlite3 -v '1.3.7'` succeeds before bundling.
Failed to install gems via Bundler.
Heroku push rejected, failed to compile Ruby/rails app
I've tried several Gemfile configurations but this is what I currently have:
group :production, :staging do
gem "pg"
end
group :development, :test do
gem "sqlite3-ruby", "~> 1.3.0", :require => "sqlite3"
end
I've also tried different bundles after.. bundle, bundle install, bundle install --without development
I keep getting the same error.
Please help
Thank you
ps: Please note, I'm new with a lot of this.. So please be as specific as possible.
Thanks again
try (on fedora) or equivalent, and then either install this gem alone or restart the bundle.
yum install sqlite-devel
I just started the ruby.railstutorial.org book by Michael Hartl and have been working through the first chapter. I am using mac book OS X, Terminal, and Sublime Text. Everything has gone according to plan, up until it was time to test deployment to Heroku. I am able to connect to Heroku and run the $ git push heroku master command. But the deployment fails:
Installing sqlite3 (1.3.5) with native extensions
Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.
/usr/local/bin/ruby extconf.rb
checking for sqlite3.h... no
sqlite3.h is missing. Try 'port install sqlite3 +universal'
or 'yum install sqlite-devel' and check your shared library search path (the
location where your sqlite3 shared library is located).
*** 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:
An error occurred while installing sqlite3 (1.3.5), and Bundler cannot continue.
Make sure that `gem install sqlite3 -v '1.3.5'` succeeds before bundling.
!
! Failed to install gems via Bundler.
!
! Detected sqlite3 gem which is not supported on Heroku.
! http://devcenter.heroku.com/articles/how-do-i-use-sqlite3-for-development
!
! Heroku push rejected, failed to compile Ruby/rails app
Here is my Gemfile
source 'https://rubygems.org'
gem 'rails', '3.2.8'
# Bundle edge Rails instead:
# gem 'rails', :git => 'git://github.com/rails/rails.git'
group :development, :test do
gem 'sqlite3', '1.3.5'
end
# Gems used only for assets and not required
# in production environments by default.
group :assets do
gem 'sass-rails', '~> 3.2.5'
gem 'coffee-rails', '~> 3.2.2'
# See https://github.com/sstephenson/execjs#readme for more supported runtimes
# gem 'therubyracer', :platforms => :ruby
gem 'uglifier', '>= 1.2.3'
end
gem 'jquery-rails', '2.0.2'
group :production do
gem 'pg', '0.12.2'
end
# To use ActiveModel has_secure_password
# gem 'bcrypt-ruby', '~> 3.0.0'
# To use Jbuilder templates for JSON
# gem 'jbuilder'
# Use unicorn as the app server
# gem 'unicorn'
# Deploy with Capistrano
# gem 'capistrano'
# To use debugger
# gem 'debugger'
I have sqlite3 designated for development and not production, so I thought Heroku would just ignore it all together, but that does not seem to be the case.
Also, when i create the bundle i am using
$ bundle install --without production
I know that some people has suggested to just install PG and use that, but I really want to stick to the tutorial as much as possible, before I venture out and try a different approach.
I am a bit lost at the moment, and not sure how to proceed from here. Any help that you can provide would be most appreciated.
Thanks
Heroku can't install the sqlite3 gem, for whatever reason. But you can tell bundler that it shouldn't be trying to except when developing.
In your Gemfile, replace gem 'sqlite3' with:
group :development, :test do
gem 'sqlite3'
end
group :production do
gem 'pg'
end
Then bundler on heroku, running as production, won't try to install it.
I was finally able to deploy successfully to Heroku. Thanks to evanc3 for pointing me to an article on the Heroku site. It appears that I simply forgot to commit my Gemgile updates before deploying to Heroku. So for all of you just starting out, you need to make sure you commit your changes before deploying to Heroku.
Heroku do not support sqlite3...
Remove sqlite3 from your Gemfile, use pg gem instead. Do following change in gem file
change following in your Gemfile
gem 'sqlite3'
to
gem 'pg' #you will have to install postgresql
Important: Run
git add .
git commit
git push heroku master
Note: If you are planning to deploy for heroku, I suggest it is better to use postgres in your development phase also(install postgresql in your computer), heroku prefer psql.
If you want to use sqllite for development and postgresql for Heroku, use following config.
group :development do
gem 'sqlite3' #gem to use in development environment
end
group :production do
gem 'pg' #gem to use in production environment
end
Heroku will use pg gem since heroku run your application in production enviroment
On Heroku, your app doesn't have access to the filesystem. There's a number of reasons for this - it's basically due to the fact that you can scale your app's performance by adding new instances (i.e. running multiple servers at once), and these instances aren't guaranteed to be on the same physical machine - copying the files across would be extremely slow.
SQLite just stores the database to a file in your db/ folder, which is why it's incompatible with Heroku.
The best option, as suggested in the help link, is to move away from SQLite, because there are sometimes subtle incompatibilities between SQLite and PostgreSQL (Heroku's database of choice) and you want to find this out before you deploy to production!
After you install PostgreSQL (exactly how to do this depends on your OS) and then add gem 'pg' to your Gemfile.
I have a solution for if you don't have sqlite3 directly in your gemfile and you're still getting this error.
Most likely, you have a gem that uses sqlite3 as a dependency and it's including the gem without you knowing.
1) Go to Gemfile.lock and do a search for sqlite.
2) Locate which gem is using sqlite then move the gem into the development or test group.
3) Bundle
In Rails Tutorial they have you using sqlite3 in development & pg in production. One reason heroku deployment may fail is if your production deployment on heroku still references sqlite in your database.yml rather than postgres.
tldr; your config/database.yml should match the one shown here:
https://github.com/mhartl/sample_app_6th_ed/blob/main/config/database.yml
most importantly your production config lines should match this (so that adapter: postgres rather than adapter: sqlite3):
production:
adapter: postgresql
encoding: unicode
# For details on connection pooling, see Rails configuration guide
# https://guides.rubyonrails.org/configuring.html#database-pooling
pool: <%= ENV.fetch("RAILS_MAX_THREADS") { 5 } %>
database: sample_app_production
I'm trying to open by my rails console in my newsly created app, but I can't connect to a database. It looks like there might be a problem with sqlite3-1.3.3 vs 1.3.4
$ rails c
/Library/Ruby/Gems/1.8/gems/activerecord-3.1.1/lib/active_record/connection_adapters/abstract/connection_specification.rb:71:in `establish_connection': Please install the sqlite3 adapter: `gem install activerecord-sqlite3-adapter` (can't activate sqlite3 (~> 1.3.4, runtime), already activated sqlite3-1.3.3. Make sure all dependencies are added to Gemfile.) (RuntimeError)
Install
$sudo gem install
ERROR: could not find gem activerecord-sqlite3-adapter locally or in a repository
What gems I have installed
$gem list
*** LOCAL GEMS ***
...
sqlite3 (1.3.3)
sqlite3-ruby (1.3.3, 1.3.2, 1.2.5)
I'm using rails 3.1.1
EDIT:
Here is my gemfile
source 'http://rubygems.org'
gem 'rails', '3.1.1'
# Bundle edge Rails instead:
# gem 'rails', :git => 'git://github.com/rails/rails.git'
gem 'sqlite3'
gem 'json'
# Gems used only for assets and not required
# in production environments by default.
group :assets do
gem 'sass-rails', '~> 3.1.4'
gem 'coffee-rails', '~> 3.1.1'
gem 'uglifier', '>= 1.0.3'
end
gem 'jquery-rails'
Running bundle install produces this
$sudo bundle install
using rake (0.9.2.2)
...
Using sqlite3 (1.3.3)
Your bundle is complete! Use bundle show [gemname] to see where a bundled gem is installed.
$ bundle show sqlite3
/Library/Ruby/Gems/1.8/gems/sqlite3-1.3.3
You're using Rails 3.1, which uses bundler to manage gems.
Add gem 'sqlite3' to your Gemfile
run bundle form the command line
This will install the gems your app needs. You should then be able to launch the console.
I've seen similar situations in the past because of missing/bad shared libraries. Gems install ruby code, native bindings to libraries, but they do not install the external libraries themselves.
The dependency for sqlite on Ubuntu, for example, is libsqlite3-dev.
$ sudo apt-get install libsqlite3-dev
For OSX:
Install sqlite3 on mac osx?