title: Backbone.js Collection fetch with initial parameter
body: <p>Is there any way to fetch a collection by giving an initial model parameter to <b>fetch()</b>.</p>
  
  <p><b>To clear out: </b>I have a model Human with attributes <b>name</b> (as a string) and <b>numbers(array)</b>. I would like to find all the people in my database with given array of numbers. (<b>Example:</b> I have [123,342,4] in my array and for each number I would like to pull the people's name). </p>
  
  <p>I've created a Human collection giving the model is <b>human</b>. And when I fetch like this it causes no problem;</p>
  
  <pre><code>humanCollection.fetch({
              success:function(model,response){
                  console.log(model.toJSON().length);
                  var arr=model.toJSON();
                  for(var i=0;i&lt;arr.length;i++)
                      console.log(arr[i].humanName+" ");
                  console.log("Success");
              },
              error:function(model,response){
                  console.log(response);
                  console.log("Failure");
              }
          });
  </code></pre>
  
  <p>I'm thinking of creating a <b>dummy</b> human object with no name and just numbers and later on passing the numbers to my <b>php</b> but <b>.fetch()</b> function doesn't seem to work when I put a parameter to the beginning. Not even the code below works;</p>
  
  <pre><code> humanCollection.fetch({},{
                  success:function(model,response){
                      console.log(model.toJSON().length);
                      var arr=model.toJSON();
                      for(var i=0;i&lt;arr.length;i++)
                          console.log(arr[i].humanName+" ");
                      console.log("Success");
                  },
                  error:function(model,response){
                      console.log(response);
                      console.log("Failure");
                  }
              });
  </code></pre>
  
  <p>What could be the problem? And is it logical for me to create a dummy human model in order to retrieve a collection of humans with the given numbers. That was the only way I could think of transferring the specific required json data.</p>