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A
Anonymous
January 24, 2011
Question

Struct shorthand notation

  • January 24, 2011
  • 3 replies
  • 1702 views

Hi,

Suppose I have the following function in a CFC:

<cffunction name="getStruct" >

      <cfargument name="arg" type="struct">

.....

</cffunction>

I can use the following to pass a struct into the above function.

<cfset obj.getStruct( {x="abc"} )>

However, when I include the name of the argument

<cfset obj.getStruct( arg = {x="abc"} )>

I get the error

java.lang.IllegalStateException: no parent

Any idea why the error?



    This topic has been closed for replies.

    3 replies

    BKBK
    Community Expert
    BKBKCommunity Expert
    Community Expert
    January 26, 2011

    I don't think it has to do with the difference between invoking with {x="abc"} or with arg = {x="abc"}. The exception is telling you that your component instance (Obj) was in an illegal or inconsistent state when it made the second call to getStruct. You probably had a series of inconsistent getStruct calls.

    Test the hypothesis as follows.

    TestComp.cfc

    <cfcomponent>

    <cffunction name="getStruct" returntype="struct">
          <cfargument name="arg" type="struct">
        <cfreturn arguments.arg>
    </cffunction>

    </cfcomponent>

    testpage.cfm

    <cfset obj = createobject("component", "TestComp")>

    <cfset str1 = obj.getStruct( {x="abc"} )>
    <cfset str2 = obj.getStruct( arg = {x="abc"} )>

    <cfdump var="#str1#" label="str1">
    <cfdump var="#str2#" label="str2">

    A
    Anonymous
    January 27, 2011

    Thank you all for your help.  I wasn't sure whether the version I had included the update, so thanks for the clarification. It seems that i just need to get the server updated to fix the bug.

    @BKBK: I tried your code and it gives the same error on the server. 

    Sincerely,

    ML

    BKBK
    Community Expert
    BKBKCommunity Expert
    Community Expert
    January 27, 2011

    minli98 wrote:

    Thank you all for your help.  I wasn't sure whether the version I had included the update, so thanks for the clarification. It seems that i just need to get the server updated to fix the bug.

    @BKBK: I tried your code and it gives the same error on the server. 

    I am on 9.0.1. As others have suggested, this is very likely a bug in ColdFusion 9.0.0.

    12Robots
    12Robots
    Participating Frequently
    January 26, 2011

    If I am reading the release notes correctly, it looks like this was fixed in 9.0.1

    http://kb2.adobe.com/cps/847/cpsid_84726.html

    Search for bug number 80335

    A
    Adam Cameron.
    Inspiring
    January 26, 2011

    Yeah, they did improve support for inline structs in 9.0.1.  However the OP said this:

    minli98 wrote:

    I tested it on my local computer and the server.  Both are running 9,0,0,251028.  On my local computer, the code f( arg = {x="abc"}) runs fine, but the server throws the error I mentioned.

    I dunno whether 251028 is 9.0 or 9.0.1, but both his boxes are the same version...

    --

    Adam

    12Robots
    12Robots
    Participating Frequently
    January 26, 2011

    I know what the OP wrote, that's why I answered the question.

    9.0.1 is 9,0,1,274733 and the problem with passing named inline structs was addressed in that version, according to the release notes.

    A
    Adam Cameron.
    Inspiring
    January 24, 2011

    Which version of CF?  The support for this notation was patching in CF8... I think generally you need to assign the struct to a variable, then pass the variable, as opposed tousing the {} notation directly in the argument value.  EG:

    st = {key="val"};

    x = f(arg=st);

    instead of:

    x = f(arg=key="val");

    This has been improved in CF9, but it's not completely implemented properly yet, from memory.

    --

    Adam

    A
    Anonymous
    January 24, 2011

    I tested it on my local computer and the server.  Both are running 9,0,0,251028.  On my local computer, the code f( arg = {x="abc"}) runs fine, but the server throws the error I mentioned.

    A
    Adam Cameron.
    Inspiring
    January 26, 2011

    Odd.

    I don't have CF9 in front of me to do any testing with, sorry.

    If you create the struct first... ie: assign it to a variable and pass the variable, do you get the same problem?

    --

    Adam

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