display model pk entries (#851)

lib/widget/build/build_detail.dart

@@ -385,6 +385,10 @@ class _BuildOrderDetailState extends RefreshableState<BuildOrderDetailWidget> {
     // Header tile
     tiles.add(headerTile(context));
 
+    if (showPk) {
+      tiles.add(pkTile(widget.order.pk));
+    }
+
     // Part information
     if (widget.order.partDetail != null) {
       InvenTreePart part = widget.order.partDetail!;

lib/widget/build/build_item_detail.dart

@@ -125,6 +125,10 @@ class _BuildItemDetailWidgetState
   List<Widget> getTiles(BuildContext context) {
     List<Widget> tiles = [];
 
+    if (showPk) {
+      tiles.add(pkTile(widget.item.pk));
+    }
+
     // Stock item information
     if (widget.item.stockItem != null) {
       tiles.add(

lib/widget/build/build_line_detail.dart

@@ -57,6 +57,10 @@ class _BuildLineDetailWidgetState
   List<Widget> getTiles(BuildContext context) {
     List<Widget> tiles = [];
 
+    if (showPk) {
+      tiles.add(pkTile(widget.item.pk));
+    }
+
     // Reference to the part
     tiles.add(
       ListTile(

lib/widget/company/company_detail.dart

@@ -239,6 +239,10 @@ class _CompanyDetailState extends RefreshableState<CompanyDetailWidget> {
       ),
     );
 
+    if (showPk) {
+      tiles.add(pkTile(widget.company.pk));
+    }
+
     if (!widget.company.active) {
       tiles.add(
         ListTile(

lib/widget/company/manufacturer_part_detail.dart

@@ -125,6 +125,10 @@ class _ManufacturerPartDisplayState
   List<Widget> getTiles(BuildContext context) {
     List<Widget> tiles = [];
 
+    if (showPk) {
+      tiles.add(pkTile(widget.manufacturerPart.pk));
+    }
+
     // Internal Part
     tiles.add(
       ListTile(

lib/widget/company/supplier_part_detail.dart

@@ -146,6 +146,10 @@ class _SupplierPartDisplayState
       return tiles;
     }
 
+    if (showPk) {
+      tiles.add(pkTile(widget.supplierPart.pk));
+    }
+
     // Internal Part
     tiles.add(
       ListTile(

lib/widget/order/extra_line_detail.dart

@@ -68,6 +68,10 @@ class _ExtraLineDetailWidgetState
   List<Widget> getTiles(BuildContext context) {
     List<Widget> tiles = [];
 
+    if (showPk) {
+      tiles.add(pkTile(widget.item.pk));
+    }
+
     tiles.add(
       ListTile(
         title: Text(L10().reference),

lib/widget/order/po_line_detail.dart

@@ -139,6 +139,10 @@ class _POLineDetailWidgetState extends RefreshableState<POLineDetailWidget> {
   List<Widget> getTiles(BuildContext context) {
     List<Widget> tiles = [];
 
+    if (showPk) {
+      tiles.add(pkTile(widget.item.pk));
+    }
+
     // Reference to the part
     tiles.add(
       ListTile(

lib/widget/order/purchase_order_detail.dart

@@ -404,6 +404,10 @@ class _PurchaseOrderDetailState
 
     tiles.add(headerTile(context));
 
+    if (showPk) {
+      tiles.add(pkTile(widget.order.pk));
+    }
+
     if (supportProjectCodes && widget.order.hasProjectCode) {
       tiles.add(
         ListTile(

lib/widget/order/sales_order_detail.dart

@@ -344,6 +344,10 @@ class _SalesOrderDetailState extends RefreshableState<SalesOrderDetailWidget> {
   List<Widget> orderTiles(BuildContext context) {
     List<Widget> tiles = [headerTile(context)];
 
+    if (showPk) {
+      tiles.add(pkTile(widget.order.pk));
+    }
+
     InvenTreeCompany? customer = widget.order.customer;
 
     if (supportsProjectCodes && widget.order.hasProjectCode) {

lib/widget/order/so_line_detail.dart

@@ -165,6 +165,10 @@ class _SOLineDetailWidgetState extends RefreshableState<SoLineDetailWidget> {
   List<Widget> getTiles(BuildContext context) {
     List<Widget> tiles = [];
 
+    if (showPk) {
+      tiles.add(pkTile(widget.item.pk));
+    }
+
     // Reference to the part
     tiles.add(
       ListTile(

lib/widget/order/so_shipment_detail.dart

@@ -218,6 +218,10 @@ class _SOShipmentDetailWidgetState
   List<Widget> shipmentTiles(BuildContext context) {
     List<Widget> tiles = [];
 
+    if (showPk) {
+      tiles.add(pkTile(widget.shipment.pk));
+    }
+
     final bool checked = widget.shipment.isChecked;
     final bool shipped = widget.shipment.isShipped;
     final bool delivered = widget.shipment.isDelivered;

lib/widget/part/category_display.dart

@@ -198,6 +198,7 @@ class _CategoryDisplayState extends RefreshableState<CategoryDisplayWidget> {
 
     List<Widget> tiles = <Widget>[
       getCategoryDescriptionCard(),
+      if (showPk && widget.category != null) pkTile(widget.category!.pk),
       Expanded(
         child: PaginatedPartCategoryList(filters, title: L10().subcategories),
         flex: 10,

lib/widget/part/part_detail.dart

@@ -355,6 +355,10 @@ class _PartDisplayState extends RefreshableState<PartDetailWidget> {
       return tiles;
     }
 
+    if (showPk) {
+      tiles.add(pkTile(part.pk));
+    }
+
     if (!part.isActive) {
       tiles.add(
         ListTile(

lib/widget/refreshable_state.dart

@@ -5,9 +5,12 @@ import "package:flutter_tabler_icons/flutter_tabler_icons.dart";
 import "package:inventree/api.dart";
 import "package:inventree/app_colors.dart";
 import "package:inventree/barcode/barcode.dart";
+import "package:inventree/l10.dart";
+import "package:inventree/preferences.dart";
 
 import "package:inventree/widget/back.dart";
 import "package:inventree/widget/drawer.dart";
+import "package:inventree/widget/link_icon.dart";
 import "package:inventree/widget/search.dart";
 
 /*
@@ -204,9 +207,22 @@ abstract class RefreshableState<T extends StatefulWidget> extends State<T>
 
   bool get loaded => !loading;
 
+  // Whether to display the "pk" (primary key / ID) value of the loaded model
+  bool showPk = false;
+
   // Helper function to return API instance
   InvenTreeAPI get api => InvenTreeAPI();
 
+  // Construct a tile to display the "pk" (primary key / ID) value of a model
+  // Only rendered by callers when the "showPk" setting is enabled
+  Widget pkTile(int pk) {
+    return ListTile(
+      title: Text(L10().pk),
+      leading: Icon(TablerIcons.hash),
+      trailing: LargeText(pk.toString()),
+    );
+  }
+
   @override
   void initState() {
     super.initState();
@@ -234,6 +250,8 @@ abstract class RefreshableState<T extends StatefulWidget> extends State<T>
       loading = true;
     });
 
+    showPk = await InvenTreeSettingsManager().getBool(INV_SHOW_PK, false);
+
     await request(context);
 
     // Escape if the widget is no longer loaded

lib/widget/stock/location_display.dart

@@ -366,6 +366,7 @@ class _LocationDisplayState extends RefreshableState<LocationDisplayWidget> {
 
     List<Widget> tiles = [
       locationDescriptionCard(),
+      if (showPk && location != null) pkTile(location!.pk),
       Expanded(
         child: PaginatedStockLocationList(filters, title: L10().sublocations),
         flex: 10,

lib/widget/stock/stock_detail.dart

@@ -525,6 +525,10 @@ class _StockItemDisplayState extends RefreshableState<StockDetailWidget> {
       return tiles;
     }
 
+    if (showPk) {
+      tiles.add(pkTile(widget.item.pk));
+    }
+
     // Location information
     if ((widget.item.locationId > 0) && (widget.item.locationName.isNotEmpty)) {
       tiles.add(