在推送到 heroku 之前，rails 预编译出现 postgresql 错误

Question

在线学习课程Rails。我运行以下命令 --

set RAILS_ENV=production

bundle exec rake assets:precompile

这是我得到的错误 --

rake aborted! ActiveRecord::AdapterNotSpecified: 'postgresql' database is not configured. Avai lable: ["default", "development", "test", "production", "adapter", "database", " encoding", "min_messages", "pool", "timeout"] C:/Users/username/work/stukdo/config/environment.rb:5:in `' Tasks: TOP => environment (See full trace by running task with --trace

我的 gemfile 有以下内容：

group :development, :test do
gem 'spring'
gem 'sqlite3'
end

group :production do
gem 'rails_12factor'
gem 'pg'
end

...这是我的 database.yml 文件：

default: &default
adapter: sqlite3
pool: 5
timeout: 5000

development:
<<: *default
database: db/development.sqlite3

test:
<<: *default
database: db/test.sqlite3

production: &default
adapter: postgresql
database: todoism
encoding: utf8
min_messages: warning
pool: 5
timeout: 5000

有什么想法吗？我正在严格按照课程进行。我试图在将这些文件上传到 heroku 之前对其进行预编译。

Answer 1

您必须移动 database.yml 文件中的最后一段代码：

production:
  adapter: postgresql
  database: todoism
  encoding: utf8
  pool: 5
  timeout: 5000
  username: YOUR USERNAME
  password: <%= ENV['THE DATABASE PASSWORD YOU CONFIGURED ON HEROKU'] %>

Answer 2

文件应如下所示：

gemfile

source 'https://rubygems.org'

group :development, :test do
  gem 'spring'
  gem 'sqlite3'
end

group :production do
  gem 'rails_12factor'
  gem 'pg'
end

/config/database.yml

development:
  adapter:  postgresql
  host:     localhost
  encoding: utf8
  database: todoism
  pool:     5
  username: <%= ENV['PG_USERNAME'] %>
  password: <%= ENV['PG_PASSWORD'] %>
  template: template0
  # others options

test:
   adapter:  postgresql
   host:     127.0.0.1
   encoding: utf8
   database: todoism
   pool:     5
   username: <%= ENV['PG_USERNAME'] %>
   password: <%= ENV['PG_PASSWORD'] %>
   template: template0
   # others options

production:
  adapter:  postgresql
  host:     127.0.0.1
  encoding: utf8
  database: todoism
  pool:     5
  username: <%= ENV['PG_USERNAME'] %>
  password: <%= ENV['PG_PASSWORD'] %>
  template: template0
  # others options

在推送到 heroku 之前，rails 预编译出现 postgresql 错误

postgresql error on rails precompile prior to push to heroku

postgresql

ruby-on-rails

heroku