title: Why are inherit fields not showing in Odoo 12?
body: <p>I am trying to inherit filed under new tab in sale module's product section. I try and code is working fine but it's just showing tab not showing filed under that tab. Let me share my code with you. Please help me to find where i am missing </p>
  
  <p>Here is my module code</p>
  
  <pre><code>class ProductTemplate (models.Model): 
      _inherit = 'product.template' 
      field_name1 = fields.Char (string = "label for the field")
  </code></pre>
  
  <p>Here is my view code is</p>
  
  <pre><code>&lt;record id = "product_template_sale" model = "ir.ui.view"&gt;
      &lt;field name = "name"&gt; product.tamplate.tab &lt;/field&gt; 
      &lt;field name = "model"&gt; product.template &lt;/field&gt; 
      &lt; field name = "inherit_id" ref = "product.product_template_only_form_view" /&gt; 
      &lt;field name = "arch" type = "xml"&gt; 
          &lt;notebook&gt; 
              &lt;page string = "Barcode"&gt; 
                   &lt;filed name = "field_name1" /&gt; 
              &lt;/ page&gt; 
          &lt;/notebook&gt; 
      &lt;/field&gt; 
  &lt;/record&gt;
  </code></pre>
  
  <p>There is showing new tab Barcode which i want to develop but filed is not showing there. 
  Why it's not showing and what i did wrong please help me to find it.</p>