使用jQuery遍历XML以获取元素值

Question

I have some XML that looks like so:

<closure1>
  <topClosure>
    <ellipsoidalHead>
      <standardComponentData>
        <variousElements>
        <idNumber>234567</idNumber>
        <nominalThickness units="in">0.3750</nominalThickness>
      </standardComponentData>
    </ellipsoidalHead>
  </topClosure>
</closure1>
<shell>
  <standardComponentData>
    <various_elements>
    <nominalThickness units="in">0.6250</nominalThickness>
    <idNumber>123456</idNumber>
  </standardComponentData>
</shell>
<nozzle>
  <standardComponentData>
    <various_elements>
    <attachedToidNumber>123456</attachedToidNumber>
  </standardComponentData>
<nozzle>

In my JS code, I already have the <nozzle> element bomNode as a jQuery set, ie

var bomNode = $("nozzle");

So, for each nozzle element, I need to

1. Get the value of <attachedToidNumber> in the <nozzle> element.

2. Find the element that contains the <idNumber> that matches <attachedToidNumber> ( <shell> in this case).

3. Get the value in the <nominalThickess> element.

As you can see, the depth of the desired <idNumber> element can vary. This is also a very small subset of the whole XML structure, so it can be very large.

I've tried something like this:

var attachedToElement = bomNode.parents().find('idNumber').text() === attachedToId;

but I get false returned. What's the easiest way to get the desired idNumber value? I'm sure it's something simple, but I'm just missing it.

Thanks.

UPDATE: I realized that bomNode is at the top level, I don't need to go up. a level. Doing something like this

var attachedToElement = bomNode.parents().siblings().find('idNumber')

gives me a list of children elements that have an <idNumber> element. So, I need to find the one that has the desired value. My thought is to use .each() . However, that value is defined outside of the .each() function, so I don't have anything to match against. Once I have the list of matches, what's the easiest way to get the set that has the <idNumber> value I want?

Answer 1

You were right - you missed a simple thing:

shell is not a parent of nozzle . They are siblings . Try this:

var attachedToElement = bomNode.siblings().find('idNumber').text() === attachedToId; 

But this would return true (if true) - not the actual value.