的Rails + YAML：從application.yml

加載YAML數據要使用機場的名字我的種子數據庫時分析錯誤，我用application.yml定義機場的集合：的Rails + YAML：從application.yml

AIRPORTS: 
    - name: "Charles de Gaulle" 
    city: "Paris" 
    country: "France" 
    - name: "Orly" 
    city: "Paris" 
    country: "France"

使用Rails命令（導軌c）測試，我有：

2.0.0-p247 :001 > ENV['AIRPORTS'] 
=> "[{\"name\"=>\"Charles de Gaulle\", \"city\"=>\"Paris\", \"country\"=>\"France\"}, {\"name\"=>\"Orly\", \"city\"=>\"Paris\", \"country\"=>\"France\"}]"

這是一個字符串！然後，鍵入以下的時候，我有一個錯誤：

2.0.0-p247 :002 > YAML.load(ENV['AIRPORTS']) 
Psych::SyntaxError: (<unknown>): did not find expected ',' or '}' while parsing a flow mapping at line 1 column 2 
from /Users/Hassen/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/psych.rb:205:in `parse' 
from /Users/Hassen/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/psych.rb:205:in `parse_stream' 
from /Users/Hassen/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/psych.rb:153:in `parse' 
from /Users/Hassen/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/psych.rb:129:in `load' 
from (irb):2 
from /Users/Hassen/.rvm/gems/ruby-2.0.0-p247/gems/railties-3.2.13/lib/rails/commands/console.rb:47:in `start' 
from /Users/Hassen/.rvm/gems/ruby-2.0.0-p247/gems/railties-3.2.13/lib/rails/commands/console.rb:8:in `start' 
from /Users/Hassen/.rvm/gems/ruby-2.0.0-p247/gems/railties-3.2.13/lib/rails/commands.rb:41:in `<top (required)>' 
from script/rails:6:in `require' 
from script/rails:6:in `<main>'

我很期待（我想）是有對象的數組，這樣我就可以播種我用下面的代碼數據庫：

YAML.load(ENV['AIRPORTS']).each do |airport| 
    AirPort.create airport 
    puts 'airport created: ' << airport.name 
end

感謝，

來源

2013-09-01 htaidirt

如何導入env變量中的yml文件的內容？ – apneadiving

似乎內容不是'evaled'，自從'eval ENV ['AIRPORTS']'ok – apneadiving

它是自動導入的，因爲運行'rails c'將import.yml（和其他.yml文件導入到config文件夾中）。 – htaidirt

使用費加羅gem這會做的伎倆：

(eval ENV["AIRPORTS"]).each do |params| 
    Airport.create! params 
    puts "Airport created: #{params["name"]}"

我通常使用一個簡單的初始化程序load_config.rb like：

YAML.load_file(Rails.root.join('config', 'application.yml'))['AIRPORTS'].each |params| 
    Airport.create! params 
    puts "Airport created #{params['name']}" 
end

來源

2013-09-01 11:23:41 tadejm

的Rails + YAML：從application.yml

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