The symptom of my problem is pretty simple:
$ rake db:create
(in /home/jason/projects/blog)
rake aborted!
no such file to load -- pg
(See full trace by running task with --trace)
I've already successfully run bundle install and gem install pg, so I don't know what else I might need to do.
Here's my `config/database.yml if it helps:
# SQLite version 3.x
# gem install sqlite3-ruby (not necessary on OS X Leopard)
development:
adapter: postgresql
encoding: unicode
database: blog_development
pool: 5
username: blog
password: foo
# Warning: The database defined as "test" will be erased and
# re-generated from your development database when you run "rake".
# Do not set this db to the same as development or production.
test:
adapter: postgresql
encoding: unicode
database: blog_development
pool: 5
username: blog
password: foo
production:
adapter: sqlite3
database: db/production.sqlite3
pool: 5
timeout: 5000
I figured it out. If I use pg instead of postgresql in my config/database.yml, it works.
Go to console and type below:
vim Gemfile
Inside the file commend the below:
- #gem 'sqlite3-ruby', :require => 'sqlite3'
Inside the file add the below:
- gem 'pg', :require => 'pg'
Problem Solved!!! :-) Enjoy!
One possibility is that the rake binary that you are running is from another ruby/gem environment and that it doesn't have access to the gems that you've installed.
If you have more than one version of ruby installed, try running which gem and then which rake to see if they are being run from the same bin directory. For example, on my machine both binaries are executed from bin directories under the same Ruby install:
/Users/scott/.rvm/rubies/ruby-1.9.2-p136/bin/gem
/Users/scott/.rvm/gems/ruby-1.9.2-p136/bin/rake
If you only have one ruby version installed on your system, then this isn't the answer!
Related
My professor said it would be wise to use PostgreSQL instead of SQLite in our project so that it would be easier to deploy to Heroku, but it seems that I didn't set up the database.yml properly.
Here's what I tried to do after I installed the Pg gem. The default database.yml content was:
# SQLite version 3.x
# gem install sqlite3
#
# Ensure the SQLite 3 gem is defined in your Gemfile
# gem 'sqlite3'
#
default: &default
adapter: sqlite3
pool: 5
timeout: 5000
development:
<<: *default
database: db/development.sqlite3
# Warning: The database defined as "test" will be erased and
# re-generated from your development database when you run "rake".
# Do not set this db to the same as development or production.
test:
<<: *default
database: db/test.sqlite3
production:
<<: *default
database: db/production.sqlite3
I decided to change the default adapter "sqlite3" to "postgresql", hence:
default: &default
adapter: postgresql
pool: 5
timeout: 5000
but when I use scaffold I get the error:
Specified 'postgresql' for database adapter but the gem is not loaded. Add 'gem pg' to your Gemfile and ensure its version is at the minimum required by active record
so I'm guessing that I need to put something like gem 'postgresql' in the gemfile. But the problem is I dont know the current version of PostgreSQL I have now so that I can put it on that line.
How do I know the current version of the PostgreSQL? Is this going solve my PostgreSQL setup for my project?
To use Postgres with Ruby on Rails you should follow these steps:
add the pg gem to your Gemfile which is located in the root directory of your application
run bundle install, which will install the gem and set its version and dependencies in your Gemfile.lock
install and configure postgres in your computer
configure the connection uri in config/database.yml by changing
database: db/development.sqlite3
to something like
database: "postgres://username:password#hostname:port/database_name"
In your Gemfile just add pg gem to your production group
group :production do
gem 'pg', '~> 0.19.0'
end
Then run bundle
Building a rails app on heroku (locally). Following their tutorials for rails, and installing postgres locally.
When ever I run the server or generate a migration I get the following err:
LoadError (Could not load 'active_record/connection_adapters/posgtres_adapter'. Make sure that the adapter in config/database.yml is valid. If you use an adapter other than 'mysql', 'mysql2', 'postgresql' or 'sqlite3' add the necessary adapter gem to the Gemfile.):
database.yml:
default: &default
adapter: postgresql
encoding: unicode
pool: 5
development:
<<: *default
database: myapp_development
username: Name
password: secret
host: localhost
Gem file has: gem 'rails' '4.2.0', and gem 'pg' installed
my machine's OS: Windows 64x
Any and all help appreciated.
Doubtful this is the same issue you are having but, posting these details in case it gives a lead. I'm using Windows 10
I had the same error message. To troubleshoot, I tried to do a reinstall of pg with 'gem install pg' but a file was locked.
Found I had a process still using one of the PG files and shut down the process, deleted the entire pg directory found at C:\Ruby200-x64\lib\ruby\gems\2.0.0\gems\pg-0.18.3-x64-mingw32
Reran 'gem install pg' rake db:setup, rake db:create, rake db:migrate and the error was gone.
I am trying to deploy an app (just a simple app from a Rails tutorial) to heroku but it keeps giving me the same error message. I use the command:
git push heroku master
It starts well, and then suddenly appears this error:
-----> Preparing app for Rails asset pipeline
Running: rake assets:precompile
rake aborted!
Gem::LoadError: Specified 'sqlite3' for database adapter, but the gem is not loaded. Add `gem 'sqlite3'` to your Gemfile.
I did bundle install already, everything went smooth there.
Here is my Gemfile:
# Use sqlite3 as the database for Active Record
gem 'sqlite3'
Maybe something I am missing something on databse.yml file?
# Ensure the SQLite 3 gem is defined in your Gemfile
# gem 'sqlite3'
development:
adapter: sqlite3
database: db/development.sqlite3
pool: 5
timeout: 5000
# Warning: The database defined as "test" will be erased and
# re-generated from your development database when you run "rake".
# Do not set this db to the same as development or production.
test:
adapter: sqlite3
database: db/test.sqlite3
pool: 5
timeout: 5000
production:
adapter: sqlite3
database: db/production.sqlite3
pool: 5
timeout: 5000
By the way, I don't know if it helps, but I am using Rails 4.0.4, Ruby 2.1.1 and the version of SQLite which comes already installed on Mac, which is 3.7.13
Kirti is right in saying that Heroku does not support sqlite as adapter,
do the following
in the Gemfile:
group :production, :staging do
gem 'pg'
end
group :development, :test do
gem 'sqlite3'
end
in database.yml
production:
adapter: postgresql
database: name_of_your_db
pool: 5
timeout: 5000
SQLite is not intended as a production grade database. Instead Heroku provides production grade PostgreSQL databases as a service.
Read the details SQLite on Heroku
Getting this error while learning tutorial from this site.
http://ruby.railstutorial.org/chapters/a-demo-app#sec-demo_users_resource
tried to run this rails command on windows
rails generate scaffold User name:string email:string
and getting such error as:
> .../lib/sqlite3.rb:6:in 'require':cannot load such file -- sqlite3/sqlite3_native(LoadError)
>../lib/sqlite3.rb:2:in rescue in <top(required) >
>../bundler/runtime.rb:72:in 'require'
>.../bundler/runtime.rb:72:in block (2 level)
>from bin/rails:4: in 'require'
>from bin/rails:4: in <main>
I have already tried other answers like adding directory of sqlite to PATH..(its already there C:\RailsInstaller\Ruby2.0.0\lib\ruby\gems\2.0.0\gems\sqlite3-1.3.7-x86-mingw32)..
sqlite3(1.3.7-x86-mingw32 )is there in my gem list but still getting this error.
I have also tried to put sqlite3ext.h and sqlite3.h into /ext folder but its not working
tried this command
gem install sqlite3 --platform=ruby -- --with-sqlite3-dir=C:/path/to/sqlite3
no results
here is the Content of my database.yml
here is the database.yml file contents
# SQLite version 3.x
# gem install sqlite3
#
# Ensure the SQLite 3 gem is defined in your Gemfile
# gem 'sqlite3'
development:
adapter: sqlite3
database: db/development.sqlite3
pool: 5
timeout: 5000
# Warning: The database defined as "test" will be erased and
# re-generated from your development database when you run "rake".
# Do not set this db to the same as development or production.
test:
adapter: sqlite3
database: db/test.sqlite3
pool: 5
timeout: 5000
production:
adapter: sqlite3
database: db/production.sqlite3
pool: 5
timeout: 5000
UPDATE:
As adviced by one the user which really help me " you'll run into several problems that will be frustrating purely because on Windows. If you can't remove Windows, download Virtual Box and use a Linux Distro on it. It will make life much easier for you." Switching to Linux resolved everything. thanks https://stackoverflow.com/users/1092260/althaf-hameez for this advice.
See https://stackoverflow.com/a/16748607/2466276.
My actions:
1. Download http://packages.openknapsack.org/sqlite/sqlite-3.7.15.2-x86-windows.tar.lzma
2. Unpack to C:\Knapsack\x86
3. gem uninstall sqlite3
4. gem install sqlite3 --platform=ruby -- --with-opt-dir=C:/Knapsack/x86
I've created my stack on heroku and everything has been deployed but when I try to actually visit it via URL it just defaults to the 500.html error page. The app ran fine on my localhost, but I developed it in sqlite3. I've since changed my Gemfile to look like the following and ran bundle install.
#gem 'sqlite3'
gem 'thin'
group :production do
gem 'pg'
end
group :development, :test do
gem 'sqlite3'
end
When you visit the url it should be pointing to my login page.
This is what my database.yml file looks like...does this have anything to do with my problem.
development:
adapter: sqlite3
database: db/development.sqlite3
pool: 5
timeout: 5000
# Warning: The database defined as "test" will be erased and
# re-generated from your development database when you run "rake".
# Do not set this db to the same as development or production.
test:
adapter: sqlite3
database: db/test.sqlite3
pool: 5
timeout: 5000
production:
adapter: sqlite3
database: db/production.sqlite3
pool: 5
timeout: 5000
Thanks for any advice
Use heroku logs to see the log file showing the 500 error's cause. If you haven't run your migrations that might be the cause. Be sure to run:
heroku run rake db:migrate
before you use your app.
Your database.yml file points to SQLite still. You'll need to change that to point to the PostgreSQL DB on heroku.
I can see from the comment that you are using sqlite for production into heroku. Which is not possible since heroku doesnt support sqlite. You can either use pg or mysql2 for your production environment. You can check here for solution :
How to configure database.yml for deployment to Heroku
And once you are done with it run these commands
heroku run rake db:reset
heroku run rake db:drop db:create db:seed
heroku run rake db:migrate