Implement Storage navigation and other helpful stuff

shimatta_kenkyusho/api/serializers.py

@@ -50,3 +50,6 @@ class DistributorSerializer(serializers.HyperlinkedModelSerializer):
     class Meta:
         model = parts_models.Distributor
         fields = '__all__'
+
+class StockIncrementDecrementSerializer(serializers.Serializer):
+	increment = serializers.IntegerField()

shimatta_kenkyusho/api/views.py

@@ -15,6 +15,7 @@ from django.utils import timezone
 from rest_framework.authtoken.views import ObtainAuthToken
 from rest_framework.authtoken.models import Token
 from rest_framework.throttling import AnonRateThrottle
+from rest_framework.decorators import action
 
 # Create your views here.
 class UserViewSet(viewsets.ReadOnlyModelViewSet):
@@ -48,6 +49,19 @@ class PartsStockViewSet(viewsets.ModelViewSet):
     serializer_class = StockSerializer
     permission_classes = [permissions.DjangoModelPermissions]
 
+    @action(detail=True, methods=['patch'], name="change-stock-count")
+    def update_stock(self, request, pk=None):
+        stock = self.get_object()
+        serializer = StockIncrementDecrementSerializer(data=request.data)
+        if serializer.is_valid():
+            increment = serializer.data['increment']
+            if stock.atomic_increment(increment):
+                return Response({'status': 'Stock updated', 'update_value': increment})
+            else:
+                return Response({'status': 'Stock not updated. Would be negative'}, status=status.HTTP_400_BAD_REQUEST)
+        else:
+            return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)
+
 class PartsPackageViewSet(viewsets.ModelViewSet):
     queryset = parts_models.Package.objects.all()
     serializer_class = PackageSerializer

shimatta_kenkyusho/parts/models.py

@@ -89,7 +89,10 @@ class Storage(models.Model):
 
 	def get_total_stock_amount(self):
 		stocks = Stock.objects.filter(storage=self)
-		return stocks.aggregate(Sum('amount'))['amount__sum']
+		sum = stocks.aggregate(Sum('amount'))['amount__sum']
+		if sum is None:
+			sum = 0
+		return sum
 
 	def save(self, *args, **kwargs):
 		self.validate_unique()
@@ -217,8 +220,15 @@ class Stock(models.Model):
 		return str(self.component) + ' @ ' + str(self.amount) + ' in ' + str(
 			self.storage)
 	
-	def get_under_watermark():
-		return Stock.objects.filter(amount__lt = F('watermark'))
+	@staticmethod
+	def get_under_watermark(user_filter = None, invert: bool = False):
+		query =  Stock.objects.filter(amount__lt = F('watermark'))
+		if user_filter is not None:
+			if invert:
+				query = query.exclude(storage__responsible=user_filter)
+			else:
+				query = query.filter(storage__responsible=user_filter)
+		return query
 
 class DistributorNum(models.Model):
 	class Meta:

shimatta_kenkyusho/parts/views.py

@@ -10,6 +10,7 @@ from django.views.generic import TemplateView, DetailView
 from django.contrib.auth.mixins import LoginRequiredMixin, PermissionRequiredMixin
 from .models import Storage, Stock
 from .qr_parser import QrCodeValidator
+from django.core.paginator import Paginator
 
 class QrSearchForm(forms.Form):
     my_qr_validator = QrCodeValidator()
@@ -101,11 +102,25 @@ class StockView(LoginRequiredMixin, BaseTemplateMixin, TemplateView):
     template_name = 'parts/stocks.html'
     base_title = 'Stocks'
     navbar_selected = 'Stocks'
+    default_pagination_size = 25
 
     def get_context_data(self, **kwargs):
         context = super().get_context_data(**kwargs)
-        context['low_stocks'] = Stock.get_under_watermark()
-        context['storages'] = Storage.objects.filter(parent_storage=None)
+
+        storage_page = self.request.GET.get('storage_page')
+        if storage_page is None:
+            storage_page = 1
+        low_stock_page = self.request.GET.get('low_stock_page')
+        if low_stock_page is None:
+            low_stock_page = 1
+
+        storage_paginator = Paginator(Storage.objects.filter(parent_storage=None), self.default_pagination_size)
+        low_stock_paginator = Paginator(Stock.get_under_watermark(),
+            self.default_pagination_size)
+
+        context['low_stocks'] = low_stock_paginator.get_page(low_stock_page)
+        context['storages'] = storage_paginator.get_page(storage_page)
+
         return context
     
 class StockViewDetail(LoginRequiredMixin, BaseTemplateMixin, DetailView):
@@ -114,6 +129,7 @@ class StockViewDetail(LoginRequiredMixin, BaseTemplateMixin, DetailView):
     pk_url_kwarg = 'uuid'
     base_title = ''
     navbar_selected = 'Stocks'
+    default_pagination_size = 8
 
     def get_breadcrumbs(self):
         crumbs = self.object.get_path_components()
@@ -125,4 +141,11 @@ class StockViewDetail(LoginRequiredMixin, BaseTemplateMixin, DetailView):
         self.base_title = 'Stocks / ' + self.object.name
         context = super().get_context_data(**kwargs)
         context['breadcrumbs'] = self.get_breadcrumbs()
+
+        storage_page = self.request.GET.get('storage_page')
+        if storage_page is None:
+            storage_page = 1
+        storage_paginator = Paginator(Storage.objects.filter(parent_storage=self.object), self.default_pagination_size)
+
+        context['storages'] = storage_paginator.get_page(storage_page)
         return context

shimatta_kenkyusho/templates/base.html

@@ -25,7 +25,7 @@
                         {% endfor %}
                     </ul>
                     {% if base.navbar.has_user %}
-                    <form action="" method="post" class="ms-auto">
+                    <form action="" method="post" class="ms-auto" autocomplete="off">
                         {% csrf_token %}
                         <input type="search" name="qr_search" id="qr_search_field" aria-label="QR Scan" placeholder="QR Search" class="form-control me-2 text-success">
                     </form>

shimatta_kenkyusho/templates/parts/stocks-detail.html

@@ -2,7 +2,7 @@
 {% load qr_code %}
 {% block content %}
 <div class="container">
-<nav aria-label="breadcrumb" class="fs-4">
+    <nav aria-label="breadcrumb" class="fs-4">
         <ol class="breadcrumb">
             <li class="breadcrumb-item"></li>
             {% for crumb in breadcrumbs %}
@@ -10,10 +10,51 @@
             {% endfor %}
             <li class="breadcrumb-item active" aria-current="page">{{object.name}}</li>
         </ol>
-</nav>
+    </nav>
 
-<h1>Stocks in {{object.get_full_path }}</h1>
-{% qr_from_text object.get_qr_code size="m" image_format="svg" %}
+    <div class="row">
+        <div class="col-md">
+        {% qr_from_text object.get_qr_code size="m" image_format="svg" %}
+        </div>
+        <div class="col-md">
+            {% if object.parent_storage %}
+            <h1>Sub-Storages <a class="btn btn-secondary" href="{% url 'parts-stocks-detail' uuid=object.parent_storage.id %}">Parent Storage</a></h1>
+            {% else %}
+            <h1>Sub-Storages <a class="btn btn-secondary" href="{% url 'parts-stocks'%}">Stock Overview</a></h1>
+            {% endif %}
+            <div class="list-group">
+            {% for storage in storages %}
+                <a href="{% url 'parts-stocks-detail' uuid=storage.id %}" class="text-decoration-none">
+                    <li class="list-group-item list-group-item-action justify-content-between align-items-center d-flex">
+                        <div> 
+                        <h5>{{storage.name}}</h5>
+                        Responsible: {{ storage.responsible }}
+                        </div>
+                        <span class="badge bg-primary rounded-pill">{{storage.get_total_stock_amount}}</span>
+                    </li>
+                </a>
+            {% endfor %}
+            </div>
+            <nav aria-label="Storage Navigation">
+                <ul class="pagination">
+                    {% if storages.number > 1 %}
+                    <li class="page-item"><a class="page-link" href="?storage_page={{storages.previous_page_number}}">&laquo;</a></li>
+                    <li class="page-item"><a class="page-link" href="?storage_page={{storages.previous_page_number}}">{{storages.previous_page_number}}</a></li>
+                    {% else %}
+                    <li class="page-item disabled"><span class="page-link">&laquo;</span></li>
+                    {% endif %}
+                    
+                    <li class="page-item active"><span class="page-link">{{storages.number}}</span></li>
+                    {% if storages.paginator.num_pages > storages.number %}
+                    <li class="page-item"><a class="page-link" href="?storage_page={{storages.next_page_number}}">{{storages.next_page_number}}</a></li>
+                    <li class="page-item"><a class="page-link" href="?storage_page={{storages.next_page_number}}">&raquo;</a></li>
+                    {% else %}
+                    <li class="page-item disabled"><span class="page-link">&raquo;</span></li>
+                    {% endif %}
+                </ul>
+            </nav>
+        </div>
+    </div>
 
 </div>
 {% endblock content %}

shimatta_kenkyusho/templates/parts/stocks.html

@@ -31,6 +31,24 @@
                 </li></a>
             {% endfor %}
             </div>
+            <nav aria-label="Low Stock Navigation">
+                <ul class="pagination">
+                    {% if low_stocks.number > 1 %}
+                    <li class="page-item"><a class="page-link" href="?low_stock_page={{low_stocks.previous_page_number}}">&laquo;</a></li>
+                    <li class="page-item"><a class="page-link" href="?low_stock_page={{low_stocks.previous_page_number}}">{{low_stocks.previous_page_number}}</a></li>
+                    {% else %}
+                    <li class="page-item disabled"><span class="page-link">&laquo;</span></li>
+                    {% endif %}
+                    
+                    <li class="page-item active"><span class="page-link">{{low_stocks.number}}</span></li>
+                    {% if low_stocks.paginator.num_pages > low_stocks.number %}
+                    <li class="page-item"><a class="page-link" href="?low_stock_page={{low_stocks.next_page_number}}">{{low_stocks.next_page_number}}</a></li>
+                    <li class="page-item"><a class="page-link" href="?low_stock_page={{low_stocks.next_page_number}}">&raquo;</a></li>
+                    {% else %}
+                    <li class="page-item disabled"><span class="page-link">&raquo;</span></li>
+                    {% endif %}
+                </ul>
+            </nav>
         </div>
         <div class="col-md">
            <h1>Storages</h1>
@@ -47,6 +65,24 @@
                 </a>
            {% endfor %}
            </div>
+           <nav aria-label="Storage Navigation">
+                <ul class="pagination">
+                    {% if storages.number > 1 %}
+                    <li class="page-item"><a class="page-link" href="?storage_page={{storages.previous_page_number}}">&laquo;</a></li>
+                    <li class="page-item"><a class="page-link" href="?storage_page={{storages.previous_page_number}}">{{storages.previous_page_number}}</a></li>
+                    {% else %}
+                    <li class="page-item disabled"><span class="page-link">&laquo;</span></li>
+                    {% endif %}
+                    
+                    <li class="page-item active"><span class="page-link">{{storages.number}}</span></li>
+                    {% if storages.paginator.num_pages > storages.number %}
+                    <li class="page-item"><a class="page-link" href="?storage_page={{storages.next_page_number}}">{{storages.next_page_number}}</a></li>
+                    <li class="page-item"><a class="page-link" href="?storage_page={{storages.next_page_number}}">&raquo;</a></li>
+                    {% else %}
+                    <li class="page-item disabled"><span class="page-link">&raquo;</span></li>
+                    {% endif %}
+                </ul>
+            </nav>
         </div>
     </div>
 </div>