Ruby-on-rails 将 JSON 字符串转换为 Rails 中的 JSON 数组？
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Convert JSON String to JSON Array in rails?
提问by rogerstone
I have a JSON string in rails as shown below:
我在 rails 中有一个 JSON 字符串，如下所示：
[{"content":"1D","createdTime":"09-06-2011 00:59"},{"content":"2D","createdtime":"09-06-2011 08:00"}]
which are the objects of a class content with attributes content and created time.
它们是具有属性内容和创建时间的类内容的对象。
I would like to convert this JSON string to its respective JSON object arrayso that I can run a loop and decode the JSON to its objects in rails. How can I achieve this?
我想将此 JSON 字符串转换为其各自的 JSON 对象数组，以便我可以运行循环并将 JSON 解码为其在 rails 中的对象。我怎样才能做到这一点？
回答by Jeremy B.
You can use the json library json
您可以使用 json 库json
You can then do:
然后你可以这样做：
jsonArray = [{"content":"1D","createdTime":"09-06-2011 00:59"},
{"content":"2D","createdtime":"09-06-2011 08:00"}]
objArray = JSON.parse(jsonArray)
In response to your comment, you can do this, as long as your JSON fits your model
为了回应您的评论，您可以这样做，只要您的 JSON 适合您的模型
objArray.each do |object|
# This is a hash object so now create a new one.
newMyObject = MyObject.new(object)
newMyObject.save # You can do validation or any other processing around here.
end
回答by Mario
ActiveSupport::JSON.decode(string)will decode that for you into a delicious consumable object on the server side.
ActiveSupport::JSON.decode(string)将为您将其解码为服务器端的美味消耗品。
回答by Taimoor Changaiz
If JavaScript code is internal then you can do this:
如果 JavaScript 代码是内部的，那么你可以这样做：
<script>
var hives = <%[email protected]_safe%>;
</script>
Otherwise:
除此以外：
create hidden textarea and set @hives.html_safeas its value now you can get it in JavaScript as element's value as shown below:
创建隐藏的 textarea 并将@hives.html_safe设置为其值，现在您可以在 JavaScript 中将其作为元素的值，如下所示：
In html.erb file
在 html.erb 文件中
<%= text_area_tag :hives_yearly_temp, @hives.html_safe, { style: "display: none;"} %>
In js file
在js文件中
var hives = JSON.parse( $('#hives_yearly_temp').val() );
To run loop
运行循环
for(key in hives) {
alert( hives[key] );
}
