An _id validation technique

[Ray V]

I'd like to share a chunk of knowledge I picked up. 

I had a need to validate a string as a mongodb _id. Prior to putting on the regex hat, I stumbled on to this post: http://stackoverflow.com/questions/13850819/can-i-determine-if-a-string-is-a-mongodb-objectid

The following function is how I implemented the technique in a (cfmongodb) app I'm maintaining. 

<cffunction name="isValid_id" returntype="boolean" access="public" description="I determine if the string argument is a valid mongodb _id">

<cfargument name="_id" type="string" required="true" />

<cfscript>

                       // mongoUtils should already be in the application scope
                       return application.mongoUtils.getMongoFactory().getObject("org.bson.types.ObjectId").isValid(arguments._id);

</cfscript>

</cffunction> 

Enjoy!

[Marc Esher]

Thanks, Ray!

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