How to specify function to collection.find() dynamically

Question

How can I pass the function logic to the find -function in order to use it on each document?

I am trying to find Mongo-documents recursively with certain values in a property. I have defined an "algorithm" and would like to this to the find -function, but despite reading about queries, searching and find() , I have had no luck.

// match every node with propertyname "Reference" with the exact value "43_1"
var logic = function(currentKey, currentValue) {
    return ( currentKey == "Reference" && currentValue === "43_1" );
};

db.getCollection('metavalg').find(function() {  
    function recurSearchObj(doc) {
        return Object.keys(doc).some(function(key) {
            if ( typeof(doc[key]) == "object" && doc[key] !== null ) {
                return recurSearchObj(doc[key]);
            } else {
                // invoke matching-logic
                return logic(key, doc[key]);
            }
        });
    }
    // search document recursively 
    return recurSearchObj(this);
})

---

With the help of Vladimir M, I ended up rearringing the code and doing this:

db.getCollection('metavalg').find(function() {  
    function inspectObj(doc, logic) {
        return Object.keys(doc).some(function(key) {
            if ( typeof(doc[key]) == "object" && doc[key] !== null ) {
                return inspectObj(doc[key], logic);
            } else {
                return logic(key, doc[key]);
            }
        });
    }
    return inspectObj(this, function(currentKey, currentValue) {
        return ( currentKey == "Nummer" && currentValue === "43_1" );
        //return ( currentKey == "Navn" && /max\.? 36/i.test(currentValue) );
    });
})

Answer 1

You can pass logic method as a parameter to recurcive search object:

// match every node with propertyname "Reference" with the exact value "43_1"
var logic = function(currentKey, currentValue) {
    return ( currentKey == "Reference" && currentValue === "43_1" );
};

db.getCollection('metavalg').find(function() {  
    function recurSearchObj(doc, aLogic) {
        return Object.keys(doc).some(function(key) {
            if ( typeof(doc[key]) == "object" && doc[key] !== null ) {
                return recurSearchObj(doc[key], aLogic);
            } else {
                // invoke matching-logic
                if( aLogic(key, doc[key]) ){
                       // then do somthing 
                }
            }
        });
    }
    // search document recursively 
    return recurSearchObj(this, logic);
});