Objects returned from g/g2:eval in Jelly Scripting

[sn-n00b]

OK, So I have the following simple UI Page Jelly XML , but it's returning me some strange results.

This is just a test page to prove something is working.... I have an object in JS that I want to pass out to Jelly. I want to then check for an error property, and if I don't have one iterate over each prop and display the Key and Value of the prop.

The first thing I did was write a simple test Jelly XML to prove that I could have an object in JS, pass it off to Jelly via g2:evaluate (the object will eventually be passed into this page dynamically) and use Jellys j2:if (actually I think it will end up being a choose... but it doesn't matter, I was proving the JEXL works correctly) to check for an error prop and display it, or iterate through the props.

Unfortunately I didn't get to the iterating though the props as I'm having trouble getting the object into a jvar, but I can use a javascript var if I just do a j2:evaluate without a var param.

So what am I missing here... why cannot I pass the var back out from g2:eval using the var prop to populate a jvar_ variable?

Also why are the j2:ifs for $[my_magical_js_var] and $[my_magical_js_var.error] returning false when I know that the object and prop exists. I don't mind using the .hasOwnProperty (and in fact I prefer it) but I still want to understand why the other j2:if statements are not returning as expected!

As you can see in both evaluates I output the object to the log and it all works as I would have expected.

Very confusing!

<?xml version="1.0" encoding="utf-8" ?>
<j:jelly trim="false" xmlns:j="jelly:core" xmlns:g="glide" xmlns:j2="null" xmlns:g2="null">
       <!-- Initial Test to see if an object I manually set works... It doesn't! -->
       <g2:evaluate var="jvar_my_test_object" object="true">
               var thingy = {"error":"this is some random error"}
               /*
                       This outputs the following in the log....
                       ---------------------------------------------
                       Log Object: thingy
                       Object
                       error: string = this is some random error
                       ---------------------------------------------
               */
               JSUtil.logObject(thingy, 'thingy');
               thingy;
       </g2:evaluate>
       <!-- This outputs "Error Prop: ::" -->
       <div>Error Prop: :$[jvar_my_test_object.error]:</div>
       <!-- This echos "Object: :[object Object]:" -->
       <div>Object: :$[jvar_my_test_object]:</div>
       <!-- This if test doesn't work.... -->
       <j2:if test="$[jvar_my_test_object]">
               First If test worked
       </j2:if>
       <!-- This if test doesn't work.... -->
       <j2:if test="$[jvar_my_test_object.error]">
               First If ERROR test worked
       </j2:if>
       <!-- This if test doesn't work.... -->
       <j2:if test="$[jvar_my_test_object.hasOwnProperty('error')]">
               First If hasOwnProperty test worked
       </j2:if>
       <!-- OK. No try using a JS var -->
       <g2:evaluate>
               var my_magical_js_var = {"error":"this is some random error"}
               /*
                       This outputs the following in the log....
                       ---------------------------------------------
                       Log Object: my_magical_js_var 
                       Object
                       error: string = this is some random error
                       ---------------------------------------------
               */
               JSUtil.logObject(my_magical_js_var , 'my_magical_js_var ');
       </g2:evaluate>
       <!-- This outputs "Error Prop: :this is some random error:" -->
       <div>Error Prop: :$[my_magical_js_var .error]:</div>
       <!-- This echos "Object: :[object Object]:" -->
       <div>Object: :$[my_magical_js_var ]:</div>
       <!-- This if test doesn't work.... -->
       <j2:if test="$[my_magical_js_var]">
               Second If test worked
       </j2:if>
       <!-- This if test doesn't work.... -->
       <j2:if test="$[my_magical_js_var.error]">
               Second If ERROR test worked
       </j2:if>
       <!-- This if test does.... -->
       <j2:if test="$[my_magical_js_var.hasOwnProperty('error')]">
               Second If hasOwnProperty test worked
       </j2:if>
</j:jelly>

This returns the following text.

Error Prop: ::

Object: :[object Object]:

Error Prop: :this is some random error:

Object: :[object Object]:

Second If hasOwnProperty test worked

[srinivasthelu]

Hi James,

The Jelly if condition statement seems to be working differently. If test expects exactly true/false.   I have changed the if conditions like below, and they started working.

<!-- This if test doesn't work.... -->  

      <j2:if test="$[typeof my_magical_js_var == 'object']">  

srini1       </j2:if>  

      <!-- This if test doesn't work.... -->  

      <j2:if test="$[my_magical_js_var.error== 'this is some random error']">  

              srini2 Second If ERROR test worked  

      </j2:if>  

Thanks

Srinivas

Hope that helps

Mark this answer as helpful/correct if it does so

[sn-n00b]

Hi Srinivas,

Yes that explains why the if statements are not working. It's a true bool comparison which makes sense.

It still doesn't explain why I cannot get the js object out into a jvar_ variable.

At least it gives me a starting point

Sent from my iPhone