title: How to Update product metafields in bulk using shopify API
body: <p>I want to update product metafields in bulk using Shopify Rest API.</p>
  
  <p><strong>This code update only single metafield at a time.</strong></p>
  
  <pre><code>{
    "metafield": 
        { 
         "namespace": "custom_fields",
          "key": "aa_percentage",
          "value": "2345",
          "value_type": "string"
          }
  
  }
  </code></pre>
  
  <p><strong>I have tried this method, Unfortunately not working.</strong></p>
  
  <pre><code>{
    "metafield": 
        { 
         "namespace": "custom_fields",
          "key": "aa_percentage",
          "value": "2345",
          "value_type": "string"
          },
        { 
         "namespace": "custom_fields",
          "key": "cc_percentage",
          "value": "2345",
          "value_type": "string"
          }                           
  
  
  }
  </code></pre>