added nested column in sum method

Author: nahid

examples/data.json

@@ -7,16 +7,30 @@
 		"website":"https://nahid.im"
 	},
 	"users":[
-		{"id":1, "name":"Johura Akter Sumi", "location": "dhaka"},
-		{"id":2, "name":"Mehedi Hasan Nahid", "location": "barisal"},
-		{"id":3, "name":"Ariful Islam", "location": "barisal"},
-		{"id":4, "name":"Suhel Ahmed", "location": "sylhet"},
-		{"id":5, "name":"Firoz Serniabat", "location": "barisal"},
-		{"id":6, "name":"Musa Jewel", "location": "barisal", "visits": [
-			{"name": "Sylhet", "year": 2011},
-			{"name": "Cox's Bazar", "year": 2012},
-			{"name": "Bandarbar", "year": 2014}
-		]}
+		{"id":1, "name":"Johura Akter Sumi", "location": "dhaka", "visits": {
+			"name"	: "Barisal",
+			"year"	: 2010
+		}},
+		{"id":2, "name":"Mehedi Hasan Nahid", "location": "barisal", "visits":{
+			"name"	: "Dhaka",
+			"year"	: 2015
+		}},
+		{"id":3, "name":"Ariful Islam", "location": "barisal", "visits": {
+			"name"	: "Dhaka",
+			"year"	: 2010
+		}},
+		{"id":4, "name":"Suhel Ahmed", "location": "sylhet", "visits": {
+			"name"	: "Barisal",
+			"year"	: 2014
+		}},
+		{"id":5, "name":"Firoz Serniabat", "location": "barisal", "visits": {
+			"name"	: "Barisal",
+			"year"	: 2011
+		}},
+		{"id":6, "name":"Musa Jewel", "location": "barisal", "visits": {
+			"name"	: "Khulna",
+			"year"	: 2012
+		}}
 	],
 	"products": [
 		{"id":1, "user_id": 2, "city": "bsl", "name":"iPhone", "cat":1, "price": 80000},

examples/index.php

@@ -15,14 +15,12 @@
 //});
 //
 
-$jq = new Jsonq('data1.json');
+$jq = new Jsonq('data.json');
 
 try {
-    $result = $jq->from('.')
-        //->whereContains('title', 'Day')
-        //->where('year', '>=', 2000)
-        ->countGroupBy('year')
-        ->avg();
+    $result = $jq->from('users')
+        ->where('visits.year', '=', 2010)
+        ->sum('visits.year');
     dump($result);
 } catch (\Nahid\JsonQ\Exceptions\ConditionNotAllowedException $e) {
 

src/Jsonq.php

@@ -249,11 +249,11 @@ public function sum($column = null)
             $sum = array_sum($this->_map);
         } else {
             foreach ($this->_map as $key => $val) {
-                if (isset($val[$column])) {
-                    if (is_numeric($val[$column])) {
-                        $sum += $val[$column];
-                    }
+                $value = $this->getFromNested($val, $column);
+                if (is_scalar($value)) {
+                    $sum += $value;
                 }
+
             }
         }