从数据库而不是文件系统导入SASS文件 [英] Import SASS file from database instead of filesystem

问题描述

我对Ruby没有太多经验。我想从数据库而不是文件系统@import sass。我没有在线找到任何示例。我应该如何实施。我看到我必须扩展一个importer类，但是由于我不了解ruby，所以我需要知道该类在文件系统中的位置（只需检查一下即可），并且通常涉及哪些基本步骤。

I don't have much experience with Ruby. I want to @import sass from database instead of filesystem. I did not find any examples online. How should I go about implementing this. I see that I have to extend an importer class but since I have no understanding of ruby I need to know where in my filesystem does this class reside (Just to check it out) and in general what are the basic steps involved.

更多信息

MySQL数据库包含sass内容。
因此，在我的Web应用程序中，我接受用户的sass（作为字符串），其中可能包含导入语句，例如：

MySQL database contains sass content. So in my web application I accept sass (as string) from user which may contain an import statement for example :

@import test.scss
body  { color:red } 

现在在我的MySQL数据库中我将有这样的东西

Now in my MySQL DB I will have something like this

Table  sass_files
column_name             filename  |   content
example row             test.scss |   p {color:blue;}

我想执行此导入操作，请确保我可以执行正则表达式匹配从用户输入中获取文件名，然后通过该文件名查询数据库并获取内容。
但是我读到有一种很好的方法可以使ruby / sass使用DB作为装载路径而不是文件系统。

I want to make this import work, sure I can just do a regular expression match to get the filename from the user input and then query the DB by that file name and get the content. But I read that there is a nice way to make ruby/sass use DB as a load-path instead of filesystem.

更新

我创建了一个虚拟的自定义进口商类，其查找方法为

SO i created a dummy custom importer class with find method as

def find(name, options)
  Sass::Engine.new("p { color :blue; }", options)
end

我如何将此导入器添加到不使用ruby的sass加载路径中，我可以吗更改sass gem文件夹中的源文件，然后将此导入器添加到lib / sass / importers吗？

How do i add this importer to sass load paths w/o using ruby, like can i make change to the source files in the sass gem folder and add this importer to lib/sass/importers?

谢谢

推荐答案

由于使用的是Compass进行编译，因此可以在Compass配置文件中添加自定义Sass导入器。例如，使用 compass compile -c config.rb 进行编译，您将在 config.rb 中包含类似内容。文件：

Since you're using Compass to compile, you can add a custom Sass importers in the Compass config file. For example, compiling using compass compile -c config.rb, you would include something like this in your config.rb file:

require File.join(File.dirname(__FILE__), 'importer.rb')
Sass.load_paths << Sass::Importers::Custom.new()

然后在进口商中使用。 rb 在同一目录中，您将包括进口商定义：

Then in importer.rb in the same directory, you would include your importer definition:

module Sass
    module Importers
        class Custom < Base
            def find(name, options)
                if name == '[globals]'
                    options[:syntax] = :scss
                    options[:filename] = 'globals'
                    options[:importer] = self
                    return Sass::Engine.new("$imported-variable: blue;", options)
                else
                    return nil
                end
            end

            def find_relative(uri, base, options)
                nil
            end

            def key(uri, options)
                [self.class.name + ":" + uri, uri]
            end

            def mtime(uri, options)
                nil
            end

            def to_s
                '[custom]'
            end
        end
    end
end

然后在您的Sass文件中，您可以使用导入程序：

Then in your Sass file you can use the importer:

@import '[globals]';
p {
    color: $imported-variable;
}

当然，这只是一个虚拟实现，仅接受与 [全局变量] 。您需要提供自己的访问MySQL数据库的实现，因为我没有使用Ruby进行数据库访问的经验。希望除了@Sean提供的链接之外，它还可以使您更加接近。

Of course, this is just a dummy implementation that only accepts a URI matching "[globals]". You'll need to supply your own implementation that accesses your MySQL database, as I don't have any experience with database access in Ruby. Hopefully this should get you a little closer, though, in addition to the links that @Sean has provided.

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