Adding mongodb specific operators, fixes mongodb#82 and mongodb#81

Author: mnphpexpert

Diff for: README.md

@@ -94,7 +94,7 @@ This will allow you to use your registered alias like:
 Query Builder
 -------------
 
-The database driver plugs right into the original query builder. When using mongodb connections you will be able to build fluent queries to perform database operations. For your convenience, there is a `collection` alias for `table` as well as some additional mongodb specific operations like `push` and `pull`.
+The database driver plugs right into the original query builder. When using mongodb connections you will be able to build fluent queries to perform database operations. For your convenience, there is a `collection` alias for `table` as well as some additional mongodb specific operators/operations.
 
     // With custom connection
     $user = DB::connection('mongodb')->collection('users')->get();
@@ -236,6 +236,42 @@ You may also specify additional columns to update:
     User::where('age', '29')->increment('age', 1, array('group' => 'thirty something'));
     User::where('bmi', 30)->decrement('bmi', 1, array('category' => 'overweight'));
 
+### MongoDB specific operators
+
+**Exists**
+
+Matches documents that have the specified field.
+
+    User::where('age', 'exists', true)->get();
+
+**All**
+
+Matches arrays that contain all elements specified in the query.
+
+    User::where('roles', 'all', array('moderator', 'author'))->get();
+
+**Size**
+
+Selects documents if the array field is a specified size.
+
+    User::where('tags', 'size', 3)->get();
+
+**Type**
+
+Selects documents if a field is of the specified type. For more information check: http://docs.mongodb.org/manual/reference/operator/query/type/#op._S_type
+
+    User::where('age', 'type', 2)->get();
+
+**Mod**
+
+Performs a modulo operation on the value of a field and selects documents with a specified result.
+
+    User::where('age', 'mod', array(10, 0))->get();
+
+**Where**
+
+Matches documents that satisfy a JavaScript expression. For more information check http://docs.mongodb.org/manual/reference/operator/query/where/#op._S_where
+
 ### Inserts, updates and deletes
 
 All basic insert, update, delete and select methods should be implemented.

Diff for: src/Jenssegers/Mongodb/Query/Builder.php

@@ -18,7 +18,19 @@ class Builder extends \Illuminate\Database\Query\Builder {
     protected $collection;
 
     /**
-     * All of the available operators.
+     * All of the available clause operators.
+     *
+     * @var array
+     */
+    protected $operators = array(
+        '=', '<', '>', '<=', '>=', '<>', '!=',
+        'like', 'not like', 'between', 'ilike',
+        '&', '|', '^', '<<', '>>',
+        'exists', 'type', 'mod', 'where', 'all', 'size',
+    );
+
+    /**
+     * Operator conversion.
      *
      * @var array
      */
@@ -701,10 +713,14 @@ protected function compileWhereBasic($where)
         {
             $query = array($column => $value);
         }
-        else
+        else if (array_key_exists($operator, $this->conversion))
         {
             $query = array($column => array($this->conversion[$operator] => $value));
         }
+        else
+        {
+            $query = array($column => array('$' . $operator => $value));
+        }
 
         return $query;
     }

Diff for: tests/QueryBuilderTest.php

@@ -445,4 +445,57 @@ public function testDates()
 		$this->assertEquals(2, count($users));
 	}
 
+	public function testOperators()
+	{
+		DB::collection('users')->insert(array(
+			array('name' => 'John Doe', 'age' => 30),
+			array('name' => 'Jane Doe'),
+			array('name' => 'Robert Roe', 'age' => 'thirty-one'),
+		));
+
+		$results = DB::collection('users')->where('age', 'exists', true)->get();
+		$this->assertEquals(2, count($results));
+		$this->assertEquals('John Doe', $results[0]['name']);
+
+		$results = DB::collection('users')->where('age', 'exists', false)->get();
+		$this->assertEquals(1, count($results));
+		$this->assertEquals('Jane Doe', $results[0]['name']);
+
+		$results = DB::collection('users')->where('age', 'type', 2)->get();
+		$this->assertEquals(1, count($results));
+		$this->assertEquals('Robert Roe', $results[0]['name']);
+
+		$results = DB::collection('users')->where('age', 'mod', array(15, 0))->get();
+		$this->assertEquals(1, count($results));
+		$this->assertEquals('John Doe', $results[0]['name']);
+
+		$results = DB::collection('users')->where('age', 'mod', array(29, 1))->get();
+		$this->assertEquals(1, count($results));
+		$this->assertEquals('John Doe', $results[0]['name']);
+
+		$results = DB::collection('users')->where('age', 'mod', array(14, 0))->get();
+		$this->assertEquals(0, count($results));
+
+		DB::collection('items')->insert(array(
+			array('name' => 'fork',  'tags' => array('sharp', 'pointy')),
+			array('name' => 'spork', 'tags' => array('sharp', 'pointy', 'round', 'bowl')),
+			array('name' => 'spoon', 'tags' => array('round', 'bowl')),
+		));
+
+		$results = DB::collection('items')->where('tags', 'all', array('sharp', 'pointy'))->get();
+		$this->assertEquals(2, count($results));
+
+		$results = DB::collection('items')->where('tags', 'all', array('sharp', 'round'))->get();
+		$this->assertEquals(1, count($results));
+
+		$results = DB::collection('items')->where('tags', 'size', 2)->get();
+		$this->assertEquals(2, count($results));
+
+		$results = DB::collection('items')->where('tags', 'size', 3)->get();
+		$this->assertEquals(0, count($results));
+
+		$results = DB::collection('items')->where('tags', 'size', 4)->get();
+		$this->assertEquals(1, count($results));
+	}
+
 }