Add "target_date" for Build model

- Add "overdue" status to Build serializer

InvenTree/build/api.py

@@ -46,6 +46,8 @@ class BuildList(generics.ListCreateAPIView):
 
         queryset = super().get_queryset().prefetch_related('part')
 
+        queryset = BuildSerializer.annotate_queryset(queryset)
+
         return queryset
     
     def filter_queryset(self, queryset):

InvenTree/build/forms.py

@@ -40,6 +40,7 @@ class EditBuildForm(HelperForm):
             'part',
             'quantity',
             'batch',
+            'target_date',
             'take_from',
             'destination',
             'parent',

InvenTree/build/migrations/0025_build_target_date.py

@@ -0,0 +1,18 @@
+# Generated by Django 3.0.7 on 2020-12-15 12:13
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('build', '0024_auto_20201201_1023'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='build',
+            name='target_date',
+            field=models.DateField(blank=True, help_text='Target date for build completion. Build will be overdue after this date.', null=True, verbose_name='Target completion date'),
+        ),
+    ]

InvenTree/build/models.py

@@ -47,7 +47,8 @@ class Build(MPTTModel):
         status: Build status code
         batch: Batch code transferred to build parts (optional)
         creation_date: Date the build was created (auto)
-        completion_date: Date the build was completed
+        target_date: Date the build will be overdue
+        completion_date: Date the build was completed (or, if incomplete, the expected date of completion)
         link: External URL for extra information
         notes: Text notes
     """
@@ -164,6 +165,12 @@ class Build(MPTTModel):
     
     creation_date = models.DateField(auto_now_add=True, editable=False)
     
+    target_date = models.DateField(
+        null=True, blank=True,
+        verbose_name=_('Target completion date'),
+        help_text=_('Target date for build completion. Build will be overdue after this date.')
+    )
+
     completion_date = models.DateField(null=True, blank=True)
 
     completed_by = models.ForeignKey(
@@ -183,6 +190,22 @@ class Build(MPTTModel):
         blank=True, help_text=_('Extra build notes')
     )
 
+    def is_overdue(self):
+        """
+        Returns true if this build is "overdue":
+
+        - Not completed
+        - Target date is "in the past"
+        """
+
+        # Cannot be deemed overdue if target_date is not set
+        if self.target_date is None:
+            return False
+
+        today = datetime.now().date()
+
+        return self.active and self.target_date < today
+
     @property
     def active(self):
         """

InvenTree/build/serializers.py

@@ -5,12 +5,21 @@ JSON serializers for Build API
 # -*- coding: utf-8 -*-
 from __future__ import unicode_literals
 
+import datetime
+
+from django.db.models import Q
+from django.db.models import Case, When, Value
+from django.db.models import BooleanField
+
 from rest_framework import serializers
+
 from InvenTree.serializers import InvenTreeModelSerializer
+from InvenTree.status_codes import BuildStatus
+
 from stock.serializers import StockItemSerializerBrief
+from part.serializers import PartBriefSerializer
 
 from .models import Build, BuildItem
-from part.serializers import PartBriefSerializer
 
 
 class BuildSerializer(InvenTreeModelSerializer):
@@ -23,6 +32,38 @@ class BuildSerializer(InvenTreeModelSerializer):
 
     quantity = serializers.FloatField()
 
+    overdue = serializers.BooleanField()
+
+    @staticmethod
+    def annotate_queryset(queryset):
+        """
+        Add custom annotations to the BuildSerializer queryset,
+        performing database queries as efficiently as possible.
+
+        The following annoted fields are added:
+
+        - overdue: True if the build is outstanding *and* the completion date has past
+
+        """
+
+        # Annotate a boolean 'overdue' flag
+
+        # Construct a filter for finding overdue builds
+        today = datetime.datetime.now().date()
+        overdue = Q(status__in=BuildStatus.ACTIVE_CODES) & ~Q(target_date=None) & Q(target_date__lte=today)
+
+        queryset = queryset.annotate(
+            overdue=Case(
+                When(
+                    overdue, then=Value(True, output_field=BooleanField()),
+                ),
+                default=Value(False, output_field=BooleanField())
+            )
+        )
+
+        return queryset
+
+
     def __init__(self, *args, **kwargs):
         part_detail = kwargs.pop('part_detail', False)
 
@@ -42,11 +83,13 @@ class BuildSerializer(InvenTreeModelSerializer):
             'completion_date',
             'part',
             'part_detail',
+            'overdue',
             'reference',
             'sales_order',
             'quantity',
             'status',
             'status_text',
+            'target_date',
             'notes',
             'link',
         ]

InvenTree/build/templates/build/detail.html

@@ -95,33 +95,26 @@
             <td>{% trans "Created" %}</td>
             <td>{{ build.creation_date }}</td>
         </tr>
-        </table>
-    </div>
-    <div class='col-sm-6'>
-        <table class='table table-striped'>
-            <col width='25'>
         <tr>
-                <td><span class='fas fa-dollar-sign'></span></td>
-                <td>{% trans "BOM Price" %}</td>
+            <td><span class='fas fa-calendar-alt'></span></td>
+            <td>{% trans "Target Date" %}</td>
+            {% if build.target_date %}
             <td>
-                    {% if bom_price %}
-                    {{ bom_price }}
-                    {% if build.part.has_complete_bom_pricing == False %}
-                    <br><span class='warning-msg'><i>{% trans "BOM pricing is incomplete" %}</i></span>
-                    {% endif %}
-                    {% else %}
-                    <span class='warning-msg'><i>{% trans "No pricing information" %}</i></span>
-                    {% endif %}
+                {{ build.target_date }}{% if build.is_overdue %} <span class='fas fa-calendar-times icon-red'></span>{% endif %}
             </td>
+            {% else %}
+            <td><i>{% trans "No target date set" %}</i></td>
+            {% endif %}
         </tr>
-            {% if build.completion_date %}
         <tr>
             <td><span class='fas fa-calendar-alt'></span></td>
             <td>{% trans "Completed" %}</td>
+            {% if build.completion_date %}
             <td>{{ build.completion_date }}{% if build.completed_by %}<span class='badge'>{{ build.completed_by }}</span>{% endif %}</td>
-            </tr>
+            {% else %}
+            <td><i>{% trans "Build not complete" %}</i></td>
             {% endif %}
-    
+        </tr>
         </table>
     </div>
 </div>