diff --git a/paramecio/citoplasma/slugify.py b/paramecio/citoplasma/slugify.py
index fa57d6e..e6143f7 100644
--- a/paramecio/citoplasma/slugify.py
+++ b/paramecio/citoplasma/slugify.py
@@ -54,7 +54,7 @@ def slugify(str_in, respect_upper=False, replace_space='-', replace_dot=False, r
 	str_out=str_out.replace(" ", replace_space)
 	
 	if respect_upper==False:
-		pass
+		str_out=str_out.lower()
 	
 	return str_out
 	
diff --git a/paramecio/cromosoma/corefields.py b/paramecio/cromosoma/corefields.py
index 204dbfd..a0a6eec 100644
--- a/paramecio/cromosoma/corefields.py
+++ b/paramecio/cromosoma/corefields.py
@@ -58,6 +58,12 @@ class FloatField(PhangoField):
 
         return 'FLOAT NOT NULL DEFAULT "0"'
 
+class DoubleField(FloatField):
+    
+    def get_type_sql(self):
+
+        return 'DOUBLE NOT NULL DEFAULT "0"'
+
 class CharField(PhangoField):
     
     pass
diff --git a/paramecio/cromosoma/extrafields/slugifyfield.py b/paramecio/cromosoma/extrafields/slugifyfield.py
index fae22f3..392115f 100644
--- a/paramecio/cromosoma/extrafields/slugifyfield.py
+++ b/paramecio/cromosoma/extrafields/slugifyfield.py
@@ -2,19 +2,36 @@
 
 from paramecio.cromosoma.corefields import CharField
 from paramecio.citoplasma.slugify import slugify
+from paramecio.cromosoma.coreforms import HiddenForm
 
 class SlugifyField(CharField):
     
-    def check(value):
+    def __init__(self, name, size=255, field_related=None, required=False):
+        
+        super(SlugifyField, self).__init__(name, size, required)
+        
+        self.name_form=HiddenForm
+        
+        self.field_related=field_related
+    
+    def check(self, value):
         
         value=slugify(value)
         
         if value=='':
             
-            self.error=True
+            if self.model!=None and self.field_related!=None:
+                
+                self.model.post[self.field_related]=self.model.post.get(self.field_related, '')
+                
+                value=slugify(self.model.post[self.field_related])
+                
+                if value=='':
             
-            return ''
-    
+                    self.error=True
+                    self.error_txt='Value is empty'
+                    
+                    return ''
         return value
     
 
diff --git a/paramecio/cromosoma/webmodel.py b/paramecio/cromosoma/webmodel.py
index 50f24c8..f03f456 100644
--- a/paramecio/cromosoma/webmodel.py
+++ b/paramecio/cromosoma/webmodel.py
@@ -100,6 +100,10 @@ class WebModel:
         self.last_id=0
         
         self.distinct=''
+        
+        # A simple dictionary where post values are saved for use of fields classes
+        
+        self.post={}
     
     # A method where create the new fields of this model
     
@@ -149,6 +153,8 @@ class WebModel:
         
         # Connect to db
 
+        self.post=dict_values
+
         self.connect_to_db()
         
         self.query_error=''
@@ -181,6 +187,8 @@ class WebModel:
     
     def update(self, dict_values, external_agent=True):
         
+        self.post=dict_values
+        
         # Connect to db
         
         self.fields[self.name_field_id].required=False