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Webmaster Forum / ColdFusion / Advanced Techniques / June 2007How do I pass the entire FORM to a webservice?
What is the proper way to pass an entire form to a webservice? I can make a my CFC work with 1 param, which is the FORM, but when I try to use the CFC as a webservice I get a type mismatch error. The has to be a way to pass the entire form to a webservice rather than me, creating a bunch of params for each form element, I just can not find an example anywhere. I know I can not be the only person ever to ask this question. How are you invoking the webservice? Did you set a data type for the expected argument in the cfc? If so, what type did you use? Using cfinvoke you can use the argumentscollection attribute. If using createObject you can pass the form as a structure.  SignatureBryan Ashcraft (remove BRAIN to reply) Web Application Developer Wright Medical Technology, Inc. ------------------------------------------------------------------------- Macromedia Certified Dreamweaver Developer Adobe Community Expert (DW) :: http://www.adobe.com/communities/experts/ Yes, I wrote the service, and was passing it to a STRUCT type. I never use the argumentscollection, I always just pass the FORM thru a cfinvokeargument. One way I know I can do it, is to use CFWDDX and serialize the FORM, then pass it in as a STRING, then once in the webservice, i use CFWDDX again an deserialize it back into a struct. I am just wondering if this is the only way. I'd think there'd be a better way. Hmm. I've never had a problem passing the form struct into a webservice. What is the exact error message you are getting? SignatureBryan Ashcraft (remove BRAIN to reply) Web Application Developer Wright Medical Technology, Inc. ------------------------------------------------------------------------- Macromedia Certified Dreamweaver Developer Adobe Community Expert (DW) :: http://www.adobe.com/communities/experts/ I get a Java error ... something to the effect ... a Type Mismatch. And you're positive it is the invocation causing the error and not something else in the cfc or calling page? SignatureBryan Ashcraft (remove BRAIN to reply) Web Application Developer Wright Medical Technology, Inc. ------------------------------------------------------------------------- Macromedia Certified Dreamweaver Developer Adobe Community Expert (DW) :: http://www.adobe.com/communities/experts/ >I get a Java error ... something to the effect ... a Type Mismatch. Yes I am positive. Have you successfully passed a FORM to a webservice through cfinvoke as a cfinvokeargument parameter? (And before anyone askes, no it is not a caching problem, I run a script to destroy the stub. To me, CF is not handling the FORM scope as expected. Rather than treating it as a STRUCT, it thinks it is something else.) Technically I think FORM is not the same type of structure as StructNew(). I don't know if that's the problem, as Bash said he's had no problem with it. I'm sure that is the problem. I'd bet FORM is an OBJECT. In short, then how do I pass it in? Yes, they're both objects, just different types FORM is: coldfusion.filter.FormScope StructNew() produces: coldfusion.runtime.Struct I think you're right. I tried a simple webservice and it threw "java.lang.IllegalArgumentException: argument type mismatch" It works if I use Duplicate(form). That function must return a regular structure. .. <cfinvoke webservice="http://localhost/TestWebService.cfc?wsdl" method="testStructure" returnvariable="output"> <cfinvokeargument name="formStructure" value="#Duplicate(form)#"> </cfinvoke> <cfdump var="#output#"> <!--- TestWebService ---> <cfcomponent > <cffunction name="testStructure" access="remote" returntype="struct" output="no"> <cfargument name="formStructure" type="struct" required="yes"> <cfset var outStructure = StructNew()> <cfset outStructure.foundKeys = structKeyList(arguments.formStructure)> <cfreturn outStructure/> </cffunction> </cfcomponent> Wow, cool, I'll have to try that. I never really used Duplicate(). I just thought it was used to un-associate a pointer from the original object. I never had a need for that. That will work better for me than to use WDDX Yep, I use it for that purpose frequently. Figured it was worth a shot. Seems to do the trick. Thanks cf_dev2 ! Why not go all the way and harvest the whole form with: <!--- TestWebService ---> <cfcomponent > <cffunction name="testStructure" access="remote" returntype="struct" output="no"> <cfargument name="formStructure" type="struct" required="yes"> <cfset var outStructure = StructNew()> <cfset outStructure = duplicate(arguments.formStructure)> <cfreturn outStructure/> </cffunction> </cfcomponent> No reason other than personal preference. I wanted a quick test that proved the function was able to read the argument structure but did something different than just echoing the form structure. Cf_dev2 wrote: [i]No reason other than personal preference. [/i] Fair enough. Yeh pays yer money, yeh makes yer choice. |
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