Can't get min_delivery_date and max_delivery_date when using CarrierService

Technical Q&A
1

Hello,

Dawn theme,

I want to display the minimum and maximum delivery date on page checkout.liquid, using CarrierService (Shopify API).

I need to get min_delivery_date and max_delivery_date. And the problem is that I make a request for - /admin/api/2022-01/carrier_services.json, and I get a response that doesn’t have min_delivery_date and max_delivery_date.

I get this response:

{
   "carrier_services":[
      {
         "id":57492111453,
         "name":"dhl_express",
         "active":true,
         "service_discovery":true,
         "carrier_service_type":"legacy"
      },
      {
         "id":57492144221,
         "name":"ups_shipping",
         "active":true,
         "service_discovery":true,
         "carrier_service_type":"legacy"
      },
      {
         "id":57492078685,
         "name":"usps",
         "active":true,
         "service_discovery":true,
         "carrier_service_type":"legacy"
      }
   ]
}

Question: Why are the values min_delivery_date and max_delivery_date not displayed?

I can’t understand why this is happening.

Please help.