在代码字符串中我存储了一段代码,可以是CSS,SASS,SCSS,JavaScript或CoffeeScript.
内容来自用户,我需要在保存到数据库之前验证语法.
内容来自用户,我需要在保存到数据库之前验证语法.
我需要检查语法是否正确.目前,我正在使用一个有效的丑陋黑客.你有更好的解决方案吗？
def check_js
if language == 'coffee' # CoffeeScript
CoffeeScript.compile code
else # JavaScript
Uglifier.compile code
end
rescue ExecJS::RuntimeError => e
errors.add :code,e.message
end
def check_css
if language == 'css' # CSS
Sass::CSS.new(code).render
else # SASS,SCSS
Sass.compile code,Syntax: language.to_sym
end
rescue Sass::SyntaxError => e
errors.add :code,e.message
end
解决方法
# app/models/user.rb class User < ActiveRecord::Base validates_with Validators::SyntaxValidator end # app/models/validators/Syntax_validator.rb class Validators::SyntaxValidator < ActiveModel::Validator def validate(record) @record = record case language when :coffee CoffeeScript.compile(code) when :javascript Uglifier.compile(code) when :css Sass::CSS.new(code).render when :sass Sass.compile code,Syntax: language.to_sym when :scss Sass.compile code,Syntax: language.to_sym end rescue Sass::SyntaxError => e errors.add :code,e.message rescue ExecJS::RuntimeError => e errors.add :code,e.message end end
也许是这样的？你认为呢？
http://api.rubyonrails.org/classes/ActiveModel/Validator.html