From ec72b57898cb28ea9e80ecd15ae8bb0e05acb127 Mon Sep 17 00:00:00 2001
From: Abiola Ibrahim <abiola89@gmail.com>
Date: Mon, 18 May 2015 16:19:23 +0100
Subject: [PATCH 1/2] Sample code: should be json array not object.

---
 README.md | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/README.md b/README.md
index aedc40d..327172b 100644
--- a/README.md
+++ b/README.md
@@ -119,12 +119,12 @@ class User extends \Phalcon\Mvc\Model {
                         url: '/test/index',
                         method: 'POST'
                     },
-                    columns: {
+                    columns: [
                         {data: "id", searchable: false},
                         {data: "name"},
                         {data: "email"},
                         {data: "balance", searchable: false}
-                    }
+                    ]
                 });
             });
         </script>

From 7052efb118d3250240ff9077d505f30bcc4076ef Mon Sep 17 00:00:00 2001
From: w1n2k <cryfall@gmail.com>
Date: Fri, 26 Jun 2015 12:01:43 +0300
Subject: [PATCH 2/2] Fixed issue #8 (Empty resultset/array/builder)

---
 spec/suite/DataTableSpec.php | 56 ++++++++++++++++++++++++++++++++++++
 src/DataTable.php            |  4 +--
 2 files changed, 58 insertions(+), 2 deletions(-)

diff --git a/spec/suite/DataTableSpec.php b/spec/suite/DataTableSpec.php
index 60efcf2..3fac694 100644
--- a/spec/suite/DataTableSpec.php
+++ b/spec/suite/DataTableSpec.php
@@ -12,6 +12,24 @@
 
   });
 
+  it("should work with empty ResultSet", function() {
+
+    $resultset  = $this->di->get('modelsManager')
+                  ->createQuery("SELECT * FROM \Spec\Models\User WHERE balance < 0")
+                  ->execute();
+
+    $dataTables = new DataTable();
+    $response = $dataTables->fromResultSet($resultset)->getResponse();
+
+    expect($response)->toBe([
+      'draw' => null,
+      'recordsTotal' => 0,
+      'recordsFiltered' => 0,
+      'data' => []
+    ]);
+
+  });
+
   it("should create a ResultSet", function() {
 
     $resultset  = $this->di->get('modelsManager')
@@ -38,6 +56,24 @@
 
   });
 
+  it("should create an empty ArrayAdapter", function() {
+
+    $array  = $this->di->get('modelsManager')
+                      ->createQuery("SELECT * FROM \Spec\Models\User WHERE balance < 0")
+                      ->execute()->toArray();
+
+    $dataTables = new DataTable();
+    $response = $dataTables->fromArray($array)->getResponse();
+
+    expect($response)->toBe([
+      'draw' => null,
+      'recordsTotal' => 0,
+      'recordsFiltered' => 0,
+      'data' => []
+    ]);
+
+  });
+
   it("should create a ArrayAdapter", function() {
 
     $array  = $this->di->get('modelsManager')
@@ -64,6 +100,26 @@
 
   });
 
+  it("should create a from a empty QueryBuilder", function() {
+
+    $builder = $this->di->get('modelsManager')
+                   ->createBuilder()
+                   ->columns('id, name, email, balance')
+                   ->from('Spec\Models\User')
+                   ->where('balance < 0');
+
+    $dataTables = new DataTable();
+    $response = $dataTables->fromBuilder($builder)->getResponse();
+
+    expect($response)->toBe([
+      'draw' => null,
+      'recordsTotal' => 0,
+      'recordsFiltered' => 0,
+      'data' => []
+    ]);
+
+  });
+
   it("should create a QueryBuilder", function() {
 
     $builder = $this->di->get('modelsManager')
diff --git a/src/DataTable.php b/src/DataTable.php
index 2ba2ade..ad4bdd2 100644
--- a/src/DataTable.php
+++ b/src/DataTable.php
@@ -58,7 +58,7 @@ public function fromBuilder($builder, $columns = []) {
   }
 
   public function fromResultSet($resultSet, $columns = []) {
-    if(empty($columns)) {
+    if(empty($columns) && $resultSet->count() > 0) {
       $columns = array_keys($resultSet->getFirst()->toArray());
       $resultSet->rewind();
     }
@@ -73,7 +73,7 @@ public function fromResultSet($resultSet, $columns = []) {
   }
 
   public function fromArray($array, $columns = []) {
-    if(empty($columns)) {
+    if(empty($columns) && count($array) > 0) {
       $columns = array_keys(current($array));
     }