Liars is a tiny MVC web framework.

"liars" = "#'rail''rail'.reverses". It's a very quick and dirty hack, just demonstrating some concepts. As its name said, Don't trust it. :-)

Install

gem install liars.

Usage

1. Create a new scaffold file. The command below generates a scaffold ruby file named test.rb. liars -s test
2. Run it. The command below also generates a database file named db.yaml. liars test.rb
3. Now lauch your browser to http://localhost:2008

Help

liars --help

An extra blog example:

Copy code below blog.rb to a new ruby file such as blog.rb, then run:

liars blog.rb -d blog.yaml

blog.rb:

module Liars
  # Model ======================================================================
  class Article < M
    has_field :title
    has_field :content
    has_many :comments
  end

  class Comment < M
    has_field :title
    has_field :content
    belongs_to :article
  end

  class ArticleC < C
    route_of :index, '/', '/index', '/default'
    def index
      @articles = Article.find(:all)
      render
    end

    route_of :show, '/show/(\d+)'
    def show(id)
      @article = Article.find(id.to_i)
      render
    end

    route_of :create, '/create'
    def create
      Article.create(params[:article])
      redirect_to '/'
    end

    route_of :add_comment, '/add_comment/(\d+)'
    def add_comment(id)
      @article = Article.find(id.to_i)
      @article.comments << Comment.create(params[:comment])
      @article.save
      redirect_to "/show/#{id}"
    end

    route_of :style, '/styles.css'
    def style
      @headers["Content-Type"] = "text/css; charset=utf-8"
      @body = %[
        body {
            font-family: Utopia, Georga, serif;
        }
        h1 {
            background-color: #fef;
            margin: 0; padding: 10px;
        }
        div {
            padding: 10px;
        }
      ]
    end 
  end

  class ArticleV < V
    def layout
      html do
        head do
          title 'Liars never tell lies!'
          link :rel => 'stylesheet', :type => 'text/css', 
            :href => '/styles.css', :media => 'screen'
        end
        body do
          h1 { a 'Articles', :href => "/" }
          div do
            yield
          end
        end
      end
    end  

    def index
      h1 'Articles'
      hr
      @articles.each do |ar|
        b ar.title
        p ar.content
        a 'show comments', :href=> "/show/#{ar.id}" 
        hr
      end
      form :action=>'/create', :method=>'Post' do
        input :type=>'text', :name=>'article[title]'; br
        textarea '', :name=>'article[content]'; br
        input :type=>'submit'
      end
    end

    def show
      h1 'Articles'
      a 'index', :href=> "/" 
      hr
      b @article.title
      p @article.content
      h1 'Comments'
      hr 
      @article.comments.each do |c|
        b c.title
        p c.content
      end
      hr
      form :action=> "/add_comment/#{@article.id}", :method=>'Post' do
        input :type=>'text', :name=>'comment[title]'; br
        textarea '', :name=>'comment[content]'; br
        input :type=>'submit'
      end
    end
  end
end