Ruby on Rails - 从输入框中获取值并传递到另一个页面 [英] Ruby on Rails - Getting value from input box and pass to another page

问题描述

我必须将输入字段的值传递到另一个页面，然后它会将这个值添加到数据库中.

I have to pass the value of an input field to another page where it will add this value to the database.

代码如下

    .shoping_cart_col2
      %input.cart_box{:type => "text", :value => "1"}/
    .shoping_cart_col3 
      = button_to "Add To Cart" , line_items_path(:product_id => @prod)

当我按下添加到购物车"按钮时，我希望将 cart_box 的值连同它一起提交到下一页，该值将作为 :quantity 传递到下一页

When i press the "Add to Cart" button i want the value of cart_box to be submitted to the next page with it, this value will be passed to the next page as :quantity

推荐答案

首先你需要输入字段的名称，以便 Rails 可以找到它并传递给 params 哈希.

First of all you need some name for input field, so Rails can find it and pass to params hash.

.shoping_cart_col2
  %input.cart_box{:name => 'item_amount', :type => "text", :value => "1"}

从现在开始，您可以在您的控制器中获取此值:

From now in your controller you can get this value with:

# Somewhere in ItemLinesController
def some_action
  ...
  @quantity = params[:item_amount].nil? ? 1 : params[:item_amount]
  ...
end

现在应该可以通过 @quantity 变量从下一页的视图访问它.

And now it should be accessible from next page's view via @quantity variable.

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