Question

不确定我做错了什么，我试着把我的database.yml中的生产部分省略但是没有用，现在我有了这个：

development:
  ...

test:
  ...

production:
  database: myapp_production
  pool: 5

我的宝石文件：

gem 'pg', :group => :production
gem 'mysql2', '>= 0.3.18', '< 0.5', :group => [:development, :test]

运行时出现此错误：

Running rake db:setup on ⬢ still-crag-69600... up, run.8579 (Free)
rake aborted!
ActiveRecord::AdapterNotSpecified: 'production' database is not configured. Available: ["development", "test"]
/app/vendor/bundle/ruby/2.3.0/gems/activerecord-5.1.4/lib/active_record/connection_adapters/connection_specification.rb:246:in `resolve_symbol_connection'
/app/vendor/bundle/ruby/2.3.0/gems/activerecord-5.1.4/lib/active_record/connection_adapters/connection_specification.rb:227:in `resolve_connection'
/app/vendor/bundle/ruby/2.3.0/gems/activerecord-5.1.4/lib/active_record/connection_adapters/connection_specification.rb:141:in `resolve'
/app/vendor/bundle/ruby/2.3.0/gems/activerecord-5.1.4/lib/active_record/connection_handling.rb:55:in `establish_connection'
/app/vendor/bundle/ruby/2.3.0/gems/activerecord-5.1.4/lib/active_record/tasks/database_tasks.rb:139:in `create_current'

Answer 1

您需要在生产中添加：

do.call(rbind, lapply(1:2, function(i) {
      x <-  randomizeMatrix(com.dat, null.model = "richness", iterations = 1000)
      unlist(beta.multi.abund(x, index.family = "bray"))
    }))
#     beta.BRAY.BAL beta.BRAY.GRA beta.BRAY
#[1,]     0.7686567   0.008321701 0.7769784
#[2,]     0.6693548   0.012815704 0.6821705

确保您已创建source code。添加heroku postgresql插件时会自动设置adapter: postgresql url: <%= ENV['DATABASE_URL'] %>环境变量。

Answer 2

在database.yml中尝试以下代码：

development:
  adapter: postgresql
  encoding: utf8
  reconnect: false
  database: db_name
  pool: 5
  username: root
  password: root

production:
  adapter: postgresql
  encoding: utf8
  reconnect: false
  database: db_name
  pool: 5
  username: root
  password: root

test:
  adapter: postgresql
  encoding: utf8
  reconnect: false
  database: db_name
  pool: 5
  username: root
  password: root

无法使用rails 5连接到heroku上的安装数据库

2 个答案: