Ruby on Rails PG :: ConnectionBad

Question

當我運行命令時，我正在嘗試部署我的應用程序

rails server -b $IP -p $PORT

我得到一個錯誤

PG :: ConnectionBad

無法連接到服務器：連接被拒絕服務器是否在本地運行並且在Unix域套接字“ /var/run/postgresql/.s.PGSQL.5432”上接受連接？

提取的來源（第56行附近）：

### Convenience alias for PG::Connection.new.
def self::connect( *args )
    return PG::Connection.new( *args )
end

我的database.yml是

# SQLite version 3.x
#   gem install sqlite3
#
#   Ensure the SQLite 3 gem is defined in your Gemfile
#   gem 'sqlite3'
#
default: &default
  adapter: postgresql
  encoding: unicode
  # For details on connection pooling, see rails configuration guide
  # http://guides.rubyonrails.org/configuring.html#database-pooling
  pool: 5

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

=======更新=====

我現在收到一條錯誤消息，提示ActiveRecord :: NoDatabaseError，致命：數據庫“ sale_development”不存在

當我將database.yml更新為

# SQLite version 3.x
#   gem install sqlite3
#
#   Ensure the SQLite 3 gem is defined in your Gemfile
#   gem 'sqlite3'
#
default: &default
  adapter: postgresql
  encoding: unicode
  # For details on connection pooling, see rails configuration guide
  # http://guides.rubyonrails.org/configuring.html#database-pooling
  pool: 5

development:
  adapter: postgresql
  encoding: unicode
  database: sale_development
  pool: 5

test: &test
  adapter: postgresql
  encoding: unicode
  database: sale_test
  pool: 5

production:
  adapter: postgresql
  encoding: unicode
  database: sale_production
  pool: 5
  host: localhost
  username: sale
  password: <%= ENV['SALE_DATABASE_PASSWORD'] %>

=>引導Puma ckout的Web控制台（3.5.1）lib / web_console / middleware.rb：135：在call_app'actionpack (5.1.1) lib/action_dispatch/middleware/request_id.rb:25:in呼叫中的機架（ 2.0.3）lib / rack / method_override.rb：22： call' rack (2.0.3) lib/rack/runtime.rb:22:in調用中的activesupport（5.1.1）lib / active_support / cache / strategy / local_cache_middleware.rb：27： call' puma (3.8.2) lib/puma/thread_pool.rb:120:in spawn_thread中的inActive塊call' puma (3.8.2) lib/puma/thread_pool.rb:120:in ActiveRecord :: StatementInvalid：PG :: InvalidParameterValue：錯誤：新編碼（UTF8）不兼容：在create' /usr/local/rvm/gems/ruby-2.3.0/gems/activerecord-5.1.1/lib/active_record/tasks/database_tasks.rb:303:in / usr / local / rvm / gems /中create' /usr/local/rvm/gems/ruby-2.3.0/gems/activerecord-5.1.1/lib/active_record/tasks/database_tasks.rb:303:in ： ruby-2.3.0 / gems / activerecord-5.1.1 / lib / active_record / tasks / database_tasks.rb：3任務：TOP => db：create ActiveRecord :: StatementInvalid：PG :: InvalidParameterValue：錯誤：新編碼（UTF8）是incompat17：在create' /usr/local/rvm/gems/ruby-2.3.0/gems/activerecord-5.1.1/lib/active_record/tasks/database_tasks.rb:303:in / usr / local / r中create' /usr/local/rvm/gems/ruby-2.3.0/gems/activerecord-5.1.1/lib/active_record/tasks/database_tasks.rb:303:in ： vm / gems / ruby​​-2.3.0 / gems / activerecord-5.1.1 / lib / active_record / tasks / database_tasks.rb：303：在each_current_configuration' /usr/local/rvm/gems/ruby-2.3.0/gems/activerecord-5.1.1/lib/active_record/tasks/database_tasks.rb:136:in create_current中/usr/local/rvm/gems/ruby-2.3.0/gems/activerecord-5.1.1/lib/active_record/railties/數據庫.rake：2 / usr / local / rvm / gems / ruby​​-2.3.0 / bin / ruby​​_executable_hooks：15：在eval' /usr/local/rvm/gems/ruby-2.3.0/bin/ruby_executable_hooks:15:in '/usr/local/rvm/gems/ruby-2.3.0/gems/activerecord-5.1.1/lib/active_record/migration.rb:1007:in up' /usr/local/rvm/gems/ruby-2.3.0/gems/activerecord-5.1.1/lib/active_record/tasks/database_tasks.rb:303:in每個'/usr/local/rvm/gems/ruby-2.3.0/gems/activerecord-5.1.1/lib /active_record/tasks/database_tasks.rb:3/usr/local/rvm/gems/ruby-2.3.0/gems/activesupport-5.1.1/lib/active_support/dependencies/interlock./usr/local/rvm/gems/ ruby-2.3.0 / gems / activerecord-5.1.1 / lib / active_record / tasks / database_tasks.rb：303：在each'/usr/local/rvm/gems/ruby-2.3.0/gems/activerecord-5.1.1/lib/active_record/tasks/database_tasks.rb:303:in each'/usr/local/rvm/gems/ruby-2.3.0/gems/activerecord-5.1.1/lib/active_record/tasks/database_tasks.rb:303:in each_current_configuration'/ usr / local / rvm / gems / ruby​​-2.3.0 / gems / activerecord- 5.1.1 / lib / active_record / tasks / database_tasks.rb：136：在create_current'/usr/local/rvm/gems/ruby-2.3.0/gems/activerecord-5.1.1/lib/active_record/railties/databases.rake:27:in '/usr/local/rvm/gems/ruby-2.3.0/gems/rake-12.0.0/exe/rake:27:in的塊中（2級）：在<top (required)>' /usr/local/rvm/gems/ruby-2.3.0/bin/ruby_executable_hooks:15:in eval'/ <top (required)>' /usr/local/rvm/gems/ruby-2.3.0/bin/ruby_executable_hooks:15:in '任務：TOP => db：create（通過使用--trace運行任務來查看完整跟蹤）

=====更新====

寶石文件

 source 'https://rubygems.org'

 git_source(:github) do |repo_name|
   repo_name = "#{repo_name}/#{repo_name}" unless repo_name.include?("/")
   "https://github.com/#{repo_name}.git"
 end


 # Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
 gem 'rails', '~> 5.1.1'
 # Use sqlite3 as the database for Active Record
 gem 'sqlite3'
 gem 'pg'
 # Use Puma as the app server
 gem 'puma', '~> 3.7'
 # Use SCSS for stylesheets
 gem 'sass-rails', '~> 5.0'
 # Use Uglifier as compressor for JavaScript assets
 gem 'uglifier', '>= 1.3.0'
 # See https://github.com/rails/execjs#readme for more supported runtimes
 # gem 'therubyracer', platforms: :ruby

 # Use CoffeeScript for .coffee assets and views
 gem 'coffee-rails', '~> 4.2'
 # Turbolinks makes navigating your web application faster. Read more: https://github.com/turbolinks/turbolinks
 gem 'turbolinks', '~> 5'
 # Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
gem 'jbuilder', '~> 2.5'
# Use Redis adapter to run Action Cable in production
# gem 'redis', '~> 3.0'
# Use ActiveModel has_secure_password
# gem 'bcrypt', '~> 3.1.7'
gem 'bootstrap-sass'
gem "paperclip", "~> 5.0.0"
gem 'devise', '~> 4.3'
gem 'will_paginate', '~> 3.0'


# Use Capistrano for deployment
# gem 'capistrano-rails', group: :development

group :development, :test do
  # Call 'byebug' anywhere in the code to stop execution and get a debugger console
  gem 'byebug', platforms: [:mri, :mingw, :x64_mingw]
end

group :development do
   # Access an IRB console on exception pages or by using <%= console %> anywhere in the code.
  gem 'web-console', '>= 3.3.0'
  gem 'listen', '>= 3.0.5', '< 3.2'
  # Spring speeds up development by keeping your application running in the background. Read more: https://github.com/rails/spring
  gem 'spring'
  gem 'spring-watcher-listen', '~> 2.0.0'
end

# Windows does not include zoneinfo files, so bundle the tzinfo-data gem
gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]

Answer 1

我認為它顯示與sqlite3的連接，如果是生產版本，則必須輸入用戶名和密碼

如果使用postgresql，這供您參考

development:
  adapter: postgresql
  encoding: unicode
  database: your_database_name
  pool: 5

test: &test
  adapter: postgresql
  encoding: unicode
  database: your_database_name_test
  pool: 5

production:
  adapter: postgresql
  encoding: unicode
  database: your_database_name_production
  pool: 5
  host: localhost
  username: some_user_name
  password: some_password