Purchase order updates (#456)

* Support supplierpart in related field

* Manual add line item to purchase order

* Update release notes

lib/api_form.dart

@@ -524,11 +524,10 @@ class APIFormField {
       ),
       selectedItem: initial_data,
       asyncItems: (String filter) async {
-        Map<String, String> _filters = {};
-
-        filters.forEach((key, value) {
-          _filters[key] = value;
-        });
+        Map<String, String> _filters = {
+          ..._relatedFieldFilters(),
+          ...filters,
+        };
 
         _filters["search"] = filter;
         _filters["offset"] = "0";
@@ -586,6 +585,17 @@ class APIFormField {
       });
   }
 
+  // Construct a set of custom filters for the dropdown search
+  Map<String, String> _relatedFieldFilters() {
+
+    switch (model) {
+      case "supplierpart":
+        return InvenTreeSupplierPart().defaultListFilters();
+    }
+
+    return {};
+  }
+
   // Render a "related field" based on the "model" type
   Widget _renderRelatedField(String fieldName, dynamic item, bool selected, bool extended) {
 
@@ -611,7 +621,6 @@ class APIFormField {
 
     switch (model) {
       case "part":
-
         var part = InvenTreePart.fromJson(data);
 
         return ListTile(
@@ -626,6 +635,15 @@ class APIFormField {
           leading: extended ? InvenTreeAPI().getThumbnail(part.thumbnail) : null,
         );
 
+      case "supplierpart":
+        var part = InvenTreeSupplierPart.fromJson(data);
+
+        return ListTile(
+          title: Text(part.SKU),
+          subtitle: Text(part.partName),
+          leading: extended ? InvenTreeAPI().getThumbnail(part.partImage) : null,
+          trailing: extended && part.supplierImage.isNotEmpty ? InvenTreeAPI().getThumbnail(part.supplierImage) : null,
+        );
       case "partcategory":
 
         var cat = InvenTreePartCategory.fromJson(data);

lib/widget/order/purchase_order_detail.dart

@@ -74,6 +74,17 @@ class _PurchaseOrderDetailState extends RefreshableState<PurchaseOrderDetailWidg
 
     if (widget.order.canCreate) {
       if (widget.order.isPending) {
+
+        actions.add(
+          SpeedDialChild(
+            child: FaIcon(FontAwesomeIcons.circlePlus, color: Colors.green),
+            label: L10().lineItemAdd,
+            onTap: () async {
+              _addLineItem(context);
+            }
+          )
+        );
+
         actions.add(
           SpeedDialChild(
             child: FaIcon(FontAwesomeIcons.paperPlane, color: Colors.blue),
@@ -101,6 +112,30 @@ class _PurchaseOrderDetailState extends RefreshableState<PurchaseOrderDetailWidg
     return actions;
   }
 
+  /// Add a new line item to this order
+  Future<void> _addLineItem(BuildContext context) async {
+
+    var fields = InvenTreePOLineItem().formFields();
+
+    // Update part field definition
+    fields["part"]?["hidden"] = false;
+    fields["part"]?["filters"] = {
+      "supplier": widget.order.supplierId
+    };
+
+    fields["order"]?["value"] = widget.order.pk;
+
+    InvenTreePOLineItem().createForm(
+      context,
+      L10().lineItemAdd,
+      fields: fields,
+      onSuccess: (data) async {
+        refresh(context);
+        showSnackIcon(L10().lineItemUpdated, success: true);
+      }
+    );
+  }
+
   /// Issue this order
   Future<void> _issueOrder(BuildContext context) async {