Question

有没有办法发送类似下面的二维数组参数

{ 'bar' => { 'foo' => [[10, 100], [20, 200], [30, 300]] } }

使用6 number_field_tag？

我试过了：

<%= number_field_tag "bar[foo][][]" %>

但它没有工作

是'bar' => { 'foo' => nil }

Answer 1

我无法想到从6个盒子中构建2D数组的方法，但你可以做的是构建2个1D数组，然后将它们组合到你所在的任何页面的另一端。访问。例如：

<%= number_field_tag "bar[foo][]" %>
<%= number_field_tag "bar[foo][]" %>
<%= number_field_tag "bar[foo][]" %>
<%= number_field_tag "bar[foo2][]" %>
<%= number_field_tag "bar[foo2][]" %>
<%= number_field_tag "bar[foo2][]" %>

构建一个如下所示的参数列表："bar"=>{"foo"=>["10", "10", "10"], "foo2"=>["9", "9", "9"]}

然后在接收端，将两者结合起来很简单：

array = params[:bar][:foo].zip(params[:bar][:foo2])

生成以下数组：

[["10", "9"], ["10", "9"], ["10", "9"]]

据我所知，没有办法在params散列中设置2D数组，但我可能错了。希望这能满足您的需求：）

Answer 2

我遇到了同样的问题，并通过以下解决方案解决了该问题，该解决方案适合将任何尺寸的数组发布到Ruby on Rails：

在Ruby on Rails中创建函数：另一种方法是保存之前，遍历参数，获取值并将其推入新的空数组，然后使用此新数组设置params的array字段，这也可以完成工作。

（我已发表评论作为解释）

@array_1 = params[:params][:array_1]  # suppose your params name is 
                                      # 'params' and you want to get 
                                      # the attribute in this json 
                                      # params 'array_1' which is an 
                                      # array, but Ruby rails will 
                                      # transform it to an object if 
                                      # not doing algorithms as below.
if @array_1
    array_1 = []
    @array_1.each do |a|
        @a = a[1] # here could be any number you want to get the 
                  # data you want to put in the array, puts the a 
                  # first to check it out
        if @child_array_1
           @child_array_1 = a[1]['child_array_1'] # suppose the name 
                                                 # is 'child_array_1' 
                                                 # in your json object 
                                                 # for the first child 
                                                 # array
           child_array_1 = []
           @child_array_1.each do |child|
           child_array_1.push(child[1])  # number 1 can be changed as 
                                         # you want as above array_1
        end
        a[1]['child_array_1'] = child_array_1
      end
      array_1.push(a[1])
    end
    @array_1 = array_1
    @params.array_1 = @array_1 # suppose the first array attribute in 
                               # your json object is 'array_1'
  end

在rails上的ruby中发送嵌套的Array参数

2 个答案: