javascript - I am trying to query mongoDB by having the user enter a name in a search box, then finding all documents that match that search -

the code have far allows me query database finding specific key:value in documents, want able pass argument function user's search becomes 'value' in key:value query. currently, have "cosmic black" in place of want user's argument be.

var findmaterials = function(db, callback) {     var cursor = db.collection('materials').find( {"material_name": "cosmic black"} );     cursor.each(function(err, doc) {         assert.equal(err, null);         if (doc !== null) {             console.log(doc);         } else {             callback();         }     }); }; 

i don't know how argument in there, or if it's possible current code setup. thoughts appreciated.

var findmaterials = function(db, value, callback) {     var cursor = db.collection('materials').find( {"material_name": value} );     cursor.each(function(err, doc) {         assert.equal(err, null);         if (doc !== null) {             console.log(doc);         } else {             callback();         }     }); }; 

how you're calling findmaterials(), that's different question. should trick.

function doallthework(url, value){     mongoclient.connect(url, function(err, db) {          assert.equal(null, err);          findmaterials(db, value, function() {              db.close();          });      }); } 

pass value sort of param. if you're building api pluck out of json. if you're running cmd line same via methodology.