[Feature] Shipment Creation in Stock Allocation Modal (#3024)

* Added order reference to line item options

* Basic working version implemented

* Re-execute fields function in secondary modals

* Added missing argument and parameter

* Added missing parentheses

* Fixed hidden field name for depth > 0

InvenTree/order/templates/order/sales_order_detail.html

@@ -257,6 +257,7 @@
         '#so-lines-table',
         {
             order: {{ order.pk }},
+            reference: '{{ order.reference }}',
             status: {{ order.status }},
         }
     );

InvenTree/templates/js/translated/forms.js

@@ -913,7 +913,7 @@ function getFormFieldElement(name, options) {
         el = $(`#id_${field_name}`);
     }
 
-    if (!el.exists) {
+    if (!el.exists()) {
         console.error(`Could not find form element for field '${name}'`);
     }
 
@@ -1568,11 +1568,18 @@ function addSecondaryModal(field, fields, options) {
         var url = secondary.api_url || field.api_url;
 
         // If the "fields" attribute is a function, call it with data
-        if (secondary.fields instanceof Function) {
+        if (secondary.fields instanceof Function || secondary.fieldsFunction instanceof Function) {
 
             // Extract form values at time of button press
             var data = extractFormData(fields, options);
 
+            // Backup and execute fields function in sequential executions of modal
+            if (secondary.fields instanceof Function) {
+                secondary.fieldsFunction = secondary.fields;
+            } else if (secondary.fieldsFunction instanceof Function) {
+                secondary.fields = secondary.fieldsFunction;
+            }
+
             secondary.fields = secondary.fields(data);
         }
 
@@ -2012,7 +2019,7 @@ function constructField(name, parameters, options={}) {
 
     // Hidden inputs are rendered without label / help text / etc
     if (parameters.hidden) {
-        return constructHiddenInput(name, parameters, options);
+        return constructHiddenInput(field_name, parameters, options);
     }
 
     // Are we ending a group?
@@ -2361,13 +2368,14 @@ function constructInputOptions(name, classes, type, parameters, options={}) {
 
 
 // Construct a "hidden" input
-function constructHiddenInput(name, parameters) {
+function constructHiddenInput(name, parameters, options={}) {
 
     return constructInputOptions(
         name,
         'hiddeninput',
         'hidden',
-        parameters
+        parameters,
+        options
     );
 }
 

InvenTree/templates/js/translated/order.js

@@ -2593,6 +2593,55 @@ function allocateStockToSalesOrder(order_id, line_items, options={}) {
                 },
                 value: options.shipment || null,
                 auto_fill: true,
+                secondary: {
+                    method: 'POST',
+                    title: '{% trans "Add Shipment" %}',
+                    fields: function() {
+                        var ref = null;
+
+                        // TODO: Refactor code for getting next shipment number
+                        inventreeGet(
+                            '{% url "api-so-shipment-list" %}',
+                            {
+                                order: options.order,
+                            },
+                            {
+                                async: false,
+                                success: function(results) {
+                                    // "predict" the next reference number
+                                    ref = results.length + 1;
+
+                                    var found = false;
+
+                                    while (!found) {
+
+                                        var no_match = true;
+
+                                        for (var ii = 0; ii < results.length; ii++) {
+                                            if (ref.toString() == results[ii].reference.toString()) {
+                                                no_match = false;
+                                                break;
+                                            }
+                                        }
+
+                                        if (no_match) {
+                                            break;
+                                        } else {
+                                            ref++;
+                                        }
+                                    }
+                                }
+                            }
+                        );
+
+                        var fields = salesOrderShipmentFields(options);
+
+                        fields.reference.value = ref;
+                        fields.reference.prefix = global_settings.SALESORDER_REFERENCE_PREFIX + options.reference;
+                        
+                        return fields;
+                    }
+                }
             }
         },
         preFormContent: html,
@@ -3475,6 +3524,8 @@ function loadSalesOrderLineItemTable(table, options={}) {
                     line_item
                 ],
                 {
+                    order: options.order,
+                    reference: options.reference,
                     success: function() {
                         // Reload this table
                         $(table).bootstrapTable('refresh');