diff --git a/src/CoreFields/DoubleField.php b/src/CoreFields/DoubleField.php
index c93925a..348fa95 100644
--- a/src/CoreFields/DoubleField.php
+++ b/src/CoreFields/DoubleField.php
@@ -23,6 +23,8 @@ class DoubleField extends PhangoField {
 
 		$this->size=$size;
 		$this->form='PhangoApp\PhaModels\Forms\BaseForm';
+        $this->value=0;
+        $this->default_value=0;        
 
 	}
 
diff --git a/src/CoreFields/ForeignKeyField.php b/src/CoreFields/ForeignKeyField.php
index 973fc05..de8dc41 100644
--- a/src/CoreFields/ForeignKeyField.php
+++ b/src/CoreFields/ForeignKeyField.php
@@ -42,6 +42,7 @@ class ForeignKeyField extends IntegerField{
 		$this->protected=0;
         //($name, $value, $model, $field_name, $field_value)
 		$this->parameters=array($this->related_model, $name_field, $this->related_model->idmodel);
+        $this->default_value='NULL';
 
 	}
 	
diff --git a/src/CoreFields/IntegerField.php b/src/CoreFields/IntegerField.php
index a8e8ceb..aaefe69 100644
--- a/src/CoreFields/IntegerField.php
+++ b/src/CoreFields/IntegerField.php
@@ -29,6 +29,7 @@ class IntegerField extends PhangoField {
 		$this->max_num=$max_num;
         $this->quot_open='';
         $this->quot_close='';
+        $this->default_value=0;
 
 	}
 
diff --git a/src/CoreFields/MoneyField.php b/src/CoreFields/MoneyField.php
index f6b55aa..608845e 100644
--- a/src/CoreFields/MoneyField.php
+++ b/src/CoreFields/MoneyField.php
@@ -14,6 +14,7 @@ class MoneyField extends DoubleField{
         
         parent::__construct(11, true, 0, 0); 
         $this->form='PhangoApp\PhaModels\Forms\MoneyForm';
+        $this->default_value=0;
         
     }
     
diff --git a/src/CoreFields/SerializeField.php b/src/CoreFields/SerializeField.php
index 8ef46df..b515f48 100644
--- a/src/CoreFields/SerializeField.php
+++ b/src/CoreFields/SerializeField.php
@@ -26,6 +26,7 @@ class SerializeField extends PhangoField {
 	{
 		
 		$this->related_type=$related_type;
+        $this->default_value='{}';
 		
 	}
 	
diff --git a/src/CoreFields/TextField.php b/src/CoreFields/TextField.php
index ba2d1c1..b30d423 100644
--- a/src/CoreFields/TextField.php
+++ b/src/CoreFields/TextField.php
@@ -23,6 +23,7 @@ class TextField extends PhangoField {
 
 		$this->form='PhangoApp\PhaModels\Forms\TextAreaForm';
 		$this->multilang=$multilang;
+        $this->default_value='';
 
 	}
 
@@ -74,4 +75,4 @@ class TextField extends PhangoField {
 	}
 	
 }
-?>
\ No newline at end of file
+?>
diff --git a/src/Webmodel.php b/src/Webmodel.php
index 300bbc4..d0d0376 100644
--- a/src/Webmodel.php
+++ b/src/Webmodel.php
@@ -680,8 +680,12 @@ class Webmodel {
 	{
 	
 		//Foreach for create the query that comes from the $post array
-			
-		foreach($fields as $key => $field)
+        
+        $components=$this->components;
+        
+        unset($components[$this->idmodel]);
+        
+		foreach($components as $key => $field)
 		{
 		
 			$quot_open=$this->components[$key]->quot_open;
@@ -699,12 +703,23 @@ class Webmodel {
 					$fields[$key]='NULL';
 				}
 			}
-		
-			$arr_fields[]=$quot_open.$fields[$key].$quot_close;
+
+            if(!isset($fields[$key]))
+            {
+
+                $arr_fields[]=$quot_open.$this->components[$key]->default_value.$quot_close;
+                
+            }
+            else
+            {
+        
+                $arr_fields[]=$quot_open.$fields[$key].$quot_close;
+                
+            }
 		
 		}
 			
-		return 'insert into '.$this->name.' (`'.implode("`, `", array_keys($fields)).'`) VALUES ('.implode(", ",$arr_fields).') ';
+		return 'insert into '.$this->name.' (`'.implode("`, `", array_keys($components)).'`) VALUES ('.implode(", ",$arr_fields).') ';
 	
 	}