11

在我想确定我们是否在我们的开发和构建环境中的layout文件中。haml我们正在使用中间人。

我想做这样的事情：

- if environment == 'development'
    / Development Code
    = javascript_include_tag "Dev.js"

我试图访问 Ruby 的环境变量，以及在config.rb文件中定义一个自定义变量，但没有成功。

4

3 回答 3

30

你几乎做对了——你需要检查一个符号而不是一个字符串：

- if environment == :development
    / Development Code
    = javascript_include_tag "Dev.js"

Middleman 还添加了development?和build?可能更易于使用的方法：

- if development?
    / Development Code
    = javascript_include_tag "Dev.js"

这也适用于 ERB：

<% if development? %>
<!-- Development Code -->
<%= javascript_include_tag "Dev.js" %>
<% end %>
于 2012-12-09T16:57:59.207 回答
0

First, if possible, you should separate the logic from the data. Determine your environment in your controller, and toggle the data being sent to the view (HAML layout file).

Typically you'd set a flag in your environment variables and access it in your code from ENV. For instance, Sinatra makes the development/test/production setting available inside the code using their RACK_ENV symbol:

:environment - configuration/deployment environment A symbol
specifying the deployment environment; typically set to one of
:development, :test, or :production. The :environment defaults to the
value of the RACK_ENV environment variable (ENV['RACK_ENV']), or
:development when no RACK_ENV environment variable is set.

The environment can be set explicitly:

set :environment, :production

If you have to roll your own, that's a good way to go about it.

于 2012-12-09T15:49:39.160 回答
-1

使用中间人默认创建的 :environment 符号： http ://rubydoc.info/github/middleman/middleman/Middleman/Application#environment-instance_method

结合 haml - 您可以执行以下操作：

= javascript_include_tag "Dev.js" unless :environment == "developement"

请注意，中间人构建过程将 :environment 值更改为“构建”

你也可以使用开发？测试你是否在开发：http ://rubydoc.info/github/middleman/middleman/Middleman/Application#development%3F-instance_method

以上所有内容都适用于中间人 3.0.6，可能不适用于较小的版本（肯定不适用于 2.x）

于 2012-12-09T19:47:55.727 回答