diff --git a/lib/loggerpro/LoggerPro.FileAppender.pas b/lib/loggerpro/LoggerPro.FileAppender.pas
index 1523c1d0..542b4828 100644
--- a/lib/loggerpro/LoggerPro.FileAppender.pas
+++ b/lib/loggerpro/LoggerPro.FileAppender.pas
@@ -207,7 +207,6 @@ var
   lModuleName: string;
   lPath: string;
   lFormat: string;
-  lNow: TDateTime;
 begin
 {$IF Defined(Android)}
   lModuleName := TAndroidHelper.ApplicationTitle.Replace(' ', '_', [rfReplaceAll]);
@@ -221,7 +220,6 @@ begin
   lFormat := fLogFileNameFormat;
 
   lPath := fLogsFolder;
-  lNow := Now();
   lFormat := lFormat
     .Replace('{module}', lModuleName, [rfReplaceAll])
     .Replace('{number}', aFileNumber.ToString.PadLeft(2,'0') , [rfReplaceAll])
diff --git a/samples/activerecord_showcase/EntitiesU.pas b/samples/activerecord_showcase/EntitiesU.pas
index 9daf4743..291dd561 100644
--- a/samples/activerecord_showcase/EntitiesU.pas
+++ b/samples/activerecord_showcase/EntitiesU.pas
@@ -231,6 +231,32 @@ type
     property City: string read fCity write fCity;
   end;
 
+
+  [MVCNameCase(ncLowerCase)]
+  [MVCTable('customers')]
+  TCustomerWithOptions = class(TCustomEntity)
+  private
+{$IFNDEF USE_SEQUENCES}
+    [MVCTableField('id', [foPrimaryKey, foAutoGenerated])]
+{$ELSE}
+    [MVCTableField('id', [foPrimaryKey, foAutoGenerated],
+      'SEQ_CUSTOMERS_ID' { required for interbase } )]
+{$ENDIF}
+    fID: Integer;
+    [MVCTableField('code', [foDoNotInsert, foDoNotUpdate])]
+    fCode: NullableString;
+    [MVCTableField('description', [foDoNotInsert])]
+    fCompanyName: string;
+    [MVCTableField('city', [foDoNotUpdate])]
+    fCity: string;
+  public
+    property ID: Integer read fID write fID;
+    property Code: NullableString read fCode write fCode;
+    property CompanyName: string read fCompanyName write fCompanyName;
+    property City: string read fCity write fCity;
+  end;
+
+
   [MVCNameCase(ncLowerCase)]
   [MVCTable('order_details')]
   TOrderDetail = class(TCustomEntity)
diff --git a/samples/activerecord_showcase/MainFormU.dfm b/samples/activerecord_showcase/MainFormU.dfm
index bef09e66..d4e738a0 100644
--- a/samples/activerecord_showcase/MainFormU.dfm
+++ b/samples/activerecord_showcase/MainFormU.dfm
@@ -2,7 +2,7 @@ object MainForm: TMainForm
   Left = 0
   Top = 0
   Caption = 'TMVCActiveRecord - ShowCase'
-  ClientHeight = 626
+  ClientHeight = 660
   ClientWidth = 1094
   Color = clBtnFace
   Font.Charset = DEFAULT_CHARSET
@@ -14,7 +14,7 @@ object MainForm: TMainForm
   OnShow = FormShow
   DesignSize = (
     1094
-    626)
+    660)
   TextHeight = 13
   object btnCRUD: TButton
     Left = 8
@@ -27,7 +27,7 @@ object MainForm: TMainForm
   end
   object btnSelect: TButton
     Left = 8
-    Top = 242
+    Top = 283
     Width = 121
     Height = 33
     Caption = 'Queries'
@@ -38,7 +38,7 @@ object MainForm: TMainForm
     Left = 280
     Top = 8
     Width = 806
-    Height = 610
+    Height = 644
     Anchors = [akLeft, akTop, akRight, akBottom]
     Ctl3D = True
     DoubleBuffered = True
@@ -55,10 +55,11 @@ object MainForm: TMainForm
     TabOrder = 2
     WantReturns = False
     WordWrap = False
+    ExplicitHeight = 610
   end
   object btnRelations: TButton
     Left = 8
-    Top = 281
+    Top = 322
     Width = 121
     Height = 35
     Caption = 'Relations'
@@ -67,7 +68,7 @@ object MainForm: TMainForm
   end
   object btnInheritance: TButton
     Left = 8
-    Top = 322
+    Top = 363
     Width = 121
     Height = 34
     Caption = 'Inheritance'
@@ -76,7 +77,7 @@ object MainForm: TMainForm
   end
   object btnValidation: TButton
     Left = 8
-    Top = 362
+    Top = 403
     Width = 121
     Height = 34
     Caption = 'Validation'
@@ -94,7 +95,7 @@ object MainForm: TMainForm
   end
   object btnRQL: TButton
     Left = 8
-    Top = 402
+    Top = 443
     Width = 121
     Height = 34
     Caption = 'RQL Query'
@@ -240,7 +241,7 @@ object MainForm: TMainForm
   end
   object btnReadOnly: TButton
     Left = 8
-    Top = 442
+    Top = 483
     Width = 121
     Height = 34
     Caption = 'Read/Only Entities'
@@ -249,7 +250,7 @@ object MainForm: TMainForm
   end
   object btnSpeed: TButton
     Left = 8
-    Top = 482
+    Top = 523
     Width = 121
     Height = 34
     Caption = 'Metadata Speed Test'
@@ -285,7 +286,7 @@ object MainForm: TMainForm
   end
   object btnIntegersAsBool: TButton
     Left = 8
-    Top = 522
+    Top = 563
     Width = 121
     Height = 34
     Caption = 'Integers As Booleans'
@@ -294,7 +295,7 @@ object MainForm: TMainForm
   end
   object btnObjectVersion: TButton
     Left = 8
-    Top = 562
+    Top = 603
     Width = 121
     Height = 34
     Caption = 'Object Version'
@@ -310,6 +311,15 @@ object MainForm: TMainForm
     TabOrder = 30
     OnClick = btnCustomTableClick
   end
+  object btnCRUDWithOptions: TButton
+    Left = 8
+    Top = 242
+    Width = 121
+    Height = 33
+    Caption = 'CRUD With Fields Opts'
+    TabOrder = 31
+    OnClick = btnCRUDWithOptionsClick
+  end
   object FDConnection1: TFDConnection
     Left = 312
     Top = 40
diff --git a/samples/activerecord_showcase/MainFormU.pas b/samples/activerecord_showcase/MainFormU.pas
index 427000b7..ffa7561d 100644
--- a/samples/activerecord_showcase/MainFormU.pas
+++ b/samples/activerecord_showcase/MainFormU.pas
@@ -63,6 +63,7 @@ type
     btnIntegersAsBool: TButton;
     btnObjectVersion: TButton;
     btnCustomTable: TButton;
+    btnCRUDWithOptions: TButton;
     procedure btnCRUDClick(Sender: TObject);
     procedure btnInheritanceClick(Sender: TObject);
     procedure btnMultiThreadingClick(Sender: TObject);
@@ -96,6 +97,7 @@ type
     procedure btnIntegersAsBoolClick(Sender: TObject);
     procedure btnObjectVersionClick(Sender: TObject);
     procedure btnCustomTableClick(Sender: TObject);
+    procedure btnCRUDWithOptionsClick(Sender: TObject);
   private
     procedure Log(const Value: string);
     procedure LoadCustomers(const HowManyCustomers: Integer = 50);
@@ -412,6 +414,78 @@ begin
   end;
 end;
 
+procedure TMainForm.btnCRUDWithOptionsClick(Sender: TObject);
+var
+  lCustomer: TCustomerWithOptions;
+  lID: Integer;
+begin
+  Log('** CRUD test with fields options');
+  lCustomer := TCustomerWithOptions.Create;
+  try
+    {
+      'Code' will not be persisted on table because defined as 'foReadOnly'
+    }
+    lCustomer.Code := '1234'; // "Code" will be skipped in insert and in update as well
+    lCustomer.CompanyName := 'Google Inc.'; // "CompanyName" will be skipped in insert
+    lCustomer.City := 'Montain View, CA'; // "City" will be skipped in update
+    lCustomer.Insert;
+    lID := lCustomer.ID;
+    Log('Just inserted Customer ' + lID.ToString + ' with fields options');
+  finally
+    lCustomer.Free;
+  end;
+
+  //let's check that code is empty
+  lCustomer := TMVCActiveRecord.GetByPK<TCustomerWithOptions>(lID);
+  try
+    Assert(lCustomer.Code.IsNull); // it's null
+    Assert(lCustomer.CompanyName.IsEmpty); //empty string
+    Assert(lCustomer.City = 'Montain View, CA'); //inserted
+
+    lCustomer.Code := '1234'; // "Code" will be skipped in insert and in update as well
+    lCustomer.CompanyName := 'Google Inc.'; // "CompanyName" will be saved
+    lCustomer.City := 'Via Roma 10, ITALY'; // "City" will be skipped in update
+    lCustomer.Update;
+  finally
+    lCustomer.Free;
+  end;
+
+  //let's check
+  lCustomer := TMVCActiveRecord.GetByPK<TCustomerWithOptions>(lID);
+  try
+    Assert(lCustomer.Code.IsNull); // it's null
+    Assert(lCustomer.CompanyName = 'Google Inc.'); //correctly updated
+    Assert(lCustomer.City = 'Montain View, CA'); // not updated, mantains old value
+  finally
+    lCustomer.Free;
+  end;
+
+  {
+  //if underlying field is not null, it is loaded as usual
+  TMVCActiveRecord.CurrentConnection.ExecSQL('update customers set code = ''XYZ'' where id = ?', [lID]);
+  lCustomer := TMVCActiveRecord.GetByPK<TCustomerWithReadOnlyFields>(lID);
+  try
+    Assert('XYZ' = lCustomer.Code);
+    lCustomer.CompanyName := lCustomer.CompanyName + ' changed!';
+    lCustomer.Code := 'this code will not be saved';
+    lCustomer.Update; //do not save field "code"
+    Log('Just updated Customer ' + lID.ToString);
+  finally
+    lCustomer.Free;
+  end;
+
+  //but being foReadOnly is not updated
+  lCustomer := TMVCActiveRecord.GetByPK<TCustomerWithReadOnlyFields>(lID);
+  try
+    Assert('XYZ' = lCustomer.Code);
+    lCustomer.Delete;
+    Log('Just deleted Customer ' + lID.ToString + ' with a R/O field');
+  finally
+    lCustomer.Free;
+  end;
+  }
+end;
+
 procedure TMainForm.btnCRUDWithStringPKsClick(Sender: TObject);
 var
   lCustomer: TCustomerWithCode;
diff --git a/sources/MVCFramework.ActiveRecord.pas b/sources/MVCFramework.ActiveRecord.pas
index a1dc4c63..0947808f 100644
--- a/sources/MVCFramework.ActiveRecord.pas
+++ b/sources/MVCFramework.ActiveRecord.pas
@@ -66,9 +66,11 @@ type
   TMVCActiveRecord = class;
   TMVCActiveRecordFieldOption = (foPrimaryKey, { it's the primary key of the mapped table }
     foAutoGenerated, { not written, read - similar to readonly }
-    foReadOnly, { not written, read }
+    foReadOnly, { not written, read - like foDoNotInsert+foDoNotUpdate }
     foWriteOnly, { written, not read }
-    foVersion {used for versioning, only one field with foVersion is allowed in class}
+    foVersion, {used for versioning, only one field with foVersion is allowed in class}
+    foDoNotInsert, { this field is not included in SQL INSERT commands }
+    foDoNotUpdate { this field is not included in SQL UPDATE commands }
     );
   TMVCActiveRecordFieldOptions = set of TMVCActiveRecordFieldOption;
   TMVCEntityAction = (eaCreate, eaRetrieve, eaUpdate, eaDelete);
@@ -104,7 +106,7 @@ type
     FieldName: string;
     FieldOptions: TMVCActiveRecordFieldOptions;
     DataTypeName: string;
-    Writeable, Readable, IsVersion: Boolean;
+    Writeable, Readable, Insertable, Updatable, IsVersion: Boolean;
     procedure EndUpdates;
   end;
 
@@ -3899,7 +3901,7 @@ begin
     begin
       Result := Result + GetFieldNameForSQL(lPair.Value.FieldName) + ' = ' +
         GetParamNameForSQL(lPair.Value.FieldName) + ' + 1,';
-    end else if lPair.Value.Writeable then
+    end else if lPair.Value.Updatable then
     begin
       Result := Result + GetFieldNameForSQL(lPair.Value.FieldName) + ' = :' +
         GetParamNameForSQL(lPair.Value.FieldName) + ',';
@@ -4236,13 +4238,27 @@ begin
   begin
     Writeable := false;
     Readable := false;
+    Insertable := False;
+    Updatable := False;
   end
   else
   begin
     Writeable := ((FieldOptions * [foReadOnly, foAutoGenerated]) = []);
-    Readable := (FieldOptions * [foWriteOnly]) = [];
+    Readable := not (foWriteOnly in FieldOptions);
+    Insertable := not (foDoNotInsert in FieldOptions);
+    Updatable := not (foDoNotUpdate in FieldOptions);
   end;
   IsVersion := foVersion in FieldOptions;
+
+  // field options consistency check
+//  if Writeable and (not Updatable) then
+//  begin
+//    raise EMVCActiveRecord.CreateFmt('Field "%s" cannot be Writeable but not Updateable', [FieldName]);
+//  end;
+//  if (not Writeable) and (Readable) and (Updatable or Insertable) then
+//  begin
+//    raise EMVCActiveRecord.CreateFmt('Field "%s" cannot be ReadOnly but (Updateable or Insertable)', [FieldName]);
+//  end;
 end;
 
 { TMVCUnitOfWork<T> }
diff --git a/sources/MVCFramework.SQLGenerators.PostgreSQL.pas b/sources/MVCFramework.SQLGenerators.PostgreSQL.pas
index 3a807337..cc9acf5b 100644
--- a/sources/MVCFramework.SQLGenerators.PostgreSQL.pas
+++ b/sources/MVCFramework.SQLGenerators.PostgreSQL.pas
@@ -85,7 +85,7 @@ begin
 
     for lKeyValue in TableMap.fMap do
     begin
-      if lKeyValue.Value.Writeable then
+      if lKeyValue.Value.Insertable then
       begin
         lSB.Append(GetFieldNameForSQL(lKeyValue.Value.FieldName) + ',');
       end;
@@ -109,7 +109,7 @@ begin
       if lKeyValue.Value.IsVersion then
       begin
         lSB.Append(OBJECT_VERSION_STARTING_VALUE + ',');
-      end else if lKeyValue.Value.Writeable then
+      end else if lKeyValue.Value.Insertable then
       begin
         lSB.Append(':' + GetParamNameForSQL(lKeyValue.Value.FieldName) + ',');
       end;