Hello anyone reading.....got the answer!!!! I solved it this way! After creating the main form view of my model, i inherited the view and modified it for my manager. Hope it helps anyone looking----------

<record  id="inherited_stock_location_view_form_inherit_store_manager_write_access"  model="ir.ui.view">     

<field name="name">inherited.stock.location.inherit.store.form.custom  </field>           

<field name="model">stock.location</field>           

<field name="inherit_id"  ref="shoe_merchandising.inherited_stock_location_view_form_inherit_store" />           

<field name="groups_id"     eval="[(6, 0, [ref('shoe_merchandising.merchandising_group_manager')])]" />           

<field name="arch" type="xml">               

<xpath expr="//field[@name='store_manager_id']" position="attributes">                   

<attribute name="attrs">   {'readonly':[('state','in',['cancel'])]}   </attribute> 

</xpath> 

</field> 

</record>