project_view.xml

<?xml version="1.0" encoding="utf-8"?>
<openerp>
    <data>

        <!--
            add project code in project form
        -->
        <record id="edit_project" model="ir.ui.view">
            <field name="name">project.project.form</field>
            <field name="model">project.project</field>
            <field name="inherit_id" ref="project.edit_project" />
            <field name="arch" type="xml">
                <!--  make project code visible (inherited from analytic_account) -->
                <xpath expr="/form/sheet/div/h1" position="after">
                    <h3>
                    <group>
                    <field name="code" string="Project Code"/>
                    </group>
                    </h3>
                </xpath>
            </field>
        </record>

        <!--
            add project code in project filter
        -->
        <record id="view_project_project_filter" model="ir.ui.view">
            <field name="name">project.project.search</field>
            <field name="model">project.project</field>
            <field name="inherit_id" ref="project.view_project_project_filter" />
            <field name="arch" type="xml">
                <field name="name" position="after">
                    <field name="code" string="Project Code" />
                </field>
            </field>
        </record>

        <!--  
            add the project code field on project view
        -->
        <record id="view_project" model="ir.ui.view">
            <field name="name">project.project.tree</field>
            <field name="model">project.project</field>
            <field name="field_parent">child_ids</field>
            <field name="inherit_id" ref="project.view_project" />
            <field name="arch" type="xml">
                <field name="name" position="after">
                    <field name="code" string="Project Code" />
                </field>
            </field>
        </record>
        
        <!--
            add project code in project kanban
        -->
        <record model="ir.ui.view" id="view_project_kanban">
            <field name="name">project.project.kanban</field>
            <field name="model">project.project</field>
            <field name="inherit_id" ref="project.view_project_kanban" />
            <field name="arch" type="xml">
                <templates>
                       <t t-extend="kanban-box">
                         <t t-jquery="h4" t-operation="inner">
                               <field name="code"/> - <field name="name"/>
                         </t>
                       </t>
                 </templates>
           </field>
       </record>

    </data>
</openerp>