Hi,

here, i have mentioned the code:

                    <notebook>
                            <page string="Test Lines">
                            <field name="labtest_type_line" options="{'no_create': True, 'no_create_edit':True}" >
                                <tree string="Test Name" editable="bottom" >
                                    <field name="labtest_type_id" required="1"/>
                                    <field name="state" invisible="1"/>
                                   
                                    <field name="sample_value"/>
                                    <field name="sample_value_per"/>
                                    <field name="ontruck_value" attrs="{'invisible': [('state', '=', 'draft')]}"/>
                                    <field name="ontruck_value_per" attrs="{'invisible': [('state', '=', 'draft')]}"/>
                                   
                                    <field name="final_value" attrs="{'invisible': [('state', 'in', ('draft','sample'))]}"/>
                                    <field name="final_value_per" attrs="{'invisible': [('state', 'in', ('draft','sample'))]}"/>
                                </tree>
                            </field>
                            </page>
                        </notebook>

Can anyone tell what i did mistake?