Ruby on Rails的PG :: ConnectionBad

我嘗試部署我的應用程序，當我運行命令Ruby on Rails的PG :: ConnectionBad

rails server -b $IP -p $PORT

我得到一個errr

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接受Unix域套接字「/var/run/postgresql/.s.PGSQL.5432」上的連接？

提取的源（左右線＃56）：

### 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

======= UPDATE =====

我現在得到一個錯誤，說ActiveRecord :: NoDatabaseError，致命：數據庫「sale_development」不存在

當我更新database.yml，以

# 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'] %>

=>引導彪馬 CKOUT ' 網絡的控制檯（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' 機架（2.0。 3）lib/rack/method_override.rb：22：在call' rack (2.0.3) lib/rack/runtime.rb:22:in調用' 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 block in spawn_thread' 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每個' /usr/local/rvm/gems/ruby-2.3.0/gems/activerecord-5.1.1/lib/activ e_record/tasks/database_tasks.rb：3Tasks：TOP => db：create ActiveRecord :: StatementInvalid：PG :: InvalidParameterValue：ERROR：new encoding（UTF8）is incompat17：in create' /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:in create_current' /usr/local/rvm/gems/ruby-2.3.0/gems/activerecord -5.1.1/lib/active_record/railties/databases.rake：2/usr/local/rvm/gems/ruby-2.3.0/bin/ruby_executable_hooks：15：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：在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 /任務/ database_tasks.rb：3的/ usr /本地/ RVM /寶石/紅寶石2.3.0 /寶石/的ActiveSupport-5.1.1/LIB/active_support /沉積/ 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_current_configuration'/ usr/local/rvm/gems/ruby-2.3.0/gems/activerecord-5.1.1/lib/active_record/tasks/database_tasks.rb：136：在'/usr/local/rvm/gems/ruby-2.3中的create_current'/usr/local/rvm/gems/ruby-2.3.0/gems/activerecord-5.1.1/lib/active_record/railties/databases.rake:27:in塊（2級）。 0/gems/rake-12.0.0/exe/rake：27：在<top (required)>' /usr/local/rvm/gems/ruby-2.3.0/bin/ruby_executable_hooks:15:in eval' /usr/local/rvm/gems/ruby-2.3。0 /斌/ ruby_executable_hooks：15：在`」任務：TOP =>分貝：創建

===== UPDATE ====（通過運行與--trace任務查看完整的跡線）

的Gemfile

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]

來源

2017-07-14 bockdavidson

只需運行rake db：create來創建數據庫，然後運行rake db：如果已有模型，則遷移 – widjajayd

如果您的服務器新建且仍然沒有數據並且它的生產服務器運行RAILS_ENV = production耙分貝：創建，然後繼續RAILS_ENV =生產耙分貝：遷移 – widjajayd

我試過了，但得到了一長串錯誤 – bockdavidson

我看來，這顯示與sqlite3的連接，如果它的生產，那麼你必須，如果使用PostgreSQL

把用戶名和密碼

這是供您參考10

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

來源

2017-07-14 16:13:26 widjajayd

我的文件的名稱是銷售，所以銷售是數據庫的名稱？對不起，如果我聽起來很愚蠢，但我對這個 – bockdavidson

非常陌生，如果你確切知道你的數據庫名稱作爲銷售，那麼你可以更改生產零件數據庫內的銷售：如果數據庫服務器位於不同的服務器上，確保你將主機從本地主機改爲數據庫的IP地址 – widjajayd

這似乎不管我做什麼，我只是不能擺脫錯誤 – bockdavidson

Ruby on Rails的PG :: ConnectionBad

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