(Delphi DLL) Shopify Query a variant for its inventory item ID

Query a product variant to find the ID of its inventory item.

Note: This example requires Chilkat v11.0.0 or greater.

For more information, see https://shopify.dev/tutorials/manage-product-inventory-with-admin-api#retrieve-the-inventory-levels-for-a-product-variant

Chilkat for Delphi Downloads Chilkat non-ActiveX DLL for Delphi Chilkat ActiveX DLL for Delphi * The examples here use the non-ActiveX DLL.

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Http, HttpResponse, JsonObject;

...

procedure TForm1.Button1Click(Sender: TObject);
var
success: Boolean;
http: HCkHttp;
resp: HCkHttpResponse;
jsonResponse: HCkJsonObject;
id: Integer;
product_id: Integer;
title: PWideChar;
inventory_item_id: Integer;
admin_graphql_api_id: PWideChar;

begin
success := False;

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

http := CkHttp_Create();

CkHttp_putLogin(http,'SHOPIFY_PRIVATE_API_KEY');
CkHttp_putPassword(http,'SHOPIFY_PRIVATE_API_KEY');

CkHttp_putAccept(http,'application/json');

resp := CkHttpResponse_Create();
success := CkHttp_HttpNoBody(http,'GET','https://{shop}.myshopify.com/admin/api/2020-04/products/{product_id}/variants/{variant_id}.json',resp);
if (success = False) then
  begin
    Memo1.Lines.Add(CkHttp__lastErrorText(http));
    Exit;
  end;

Memo1.Lines.Add('Response Status Code: ' + IntToStr(CkHttpResponse_getStatusCode(resp)));

jsonResponse := CkJsonObject_Create();
CkJsonObject_Load(jsonResponse,CkHttpResponse__bodyStr(resp));
CkJsonObject_putEmitCompact(jsonResponse,False);
Memo1.Lines.Add(CkJsonObject__emit(jsonResponse));

if (CkHttpResponse_getStatusCode(resp) <> 200) then
  begin
    Memo1.Lines.Add('Failed.');
    Exit;
  end;

// Sample output...
// (See the parsing code below..)
// 
// Use the this online tool to generate parsing code from sample JSON: 
// Generate Parsing Code from JSON

// {
//   "id": 12195009364024,
//   "product_id": 1321541042232,
//   "title": "xs",
// ...
//   "inventory_item_id": 12250274365496,
// ...
//   "admin_graphql_api_id": "gid://shopify/ProductVariant/12195009364024"
// }
// 

id := CkJsonObject_IntOf(jsonResponse,'id');
product_id := CkJsonObject_IntOf(jsonResponse,'product_id');
title := CkJsonObject__stringOf(jsonResponse,'title');
inventory_item_id := CkJsonObject_IntOf(jsonResponse,'inventory_item_id');
admin_graphql_api_id := CkJsonObject__stringOf(jsonResponse,'admin_graphql_api_id');

CkHttp_Dispose(http);
CkHttpResponse_Dispose(resp);
CkJsonObject_Dispose(jsonResponse);

end;