诗歌rails之model name in url

关键字: Rails url
设计更利于搜索的url是SEO的一个要点，我们来看看怎样将http://localhost/products/6转化成
http://localhost/products/6-gallon-of-milk或者http://localhost/products/gallon-of-milk
对第一种url，首先添加permalink字段:

create_table "products", :force => true do |t|
  t.column "name",        :string
  t.column "price",       :float
  t.column "description", :text
  t.column "permalink",   :string
end

create_table "products", :force => true do |t|   t.column "name",        :string   t.column "price",       :float   t.column "description", :text   t.column "permalink",   :string end 

页面中的链接改为:

<%= link_to h(product.name), :action => 'show', :id => product %>

<%= link_to h(product.name), :action => 'show', :id => product %> 

覆盖Product类的to_param方法:

def to_param
  "#{id}-#{permalink}"
end

def to_param   "#{id}-#{permalink}" end 

controller也得改:

def show
  @product = Product.find(params[:id])
end

def show   @product = Product.find(params[:id]) end 

但是第一种url在#{id}后的#{permalink}值可以任意修改，因为controller实际上还是根据前面的id来查询Product的