Add full CRUD interface for Showcase management

Implemented complete web interface for managing showcases (display areas for ready-made bouquets) with:

**Backend:**
- ShowcaseForm with validation (unique name per warehouse)
- ShowcaseListView with filtering by warehouse and status
- ShowcaseCreateView, ShowcaseUpdateView with success messages
- ShowcaseDeleteView with active reservation validation
- URL routes: list, create, edit, delete

**Frontend:**
- List page with warehouse grouping, active reservations count
- Responsive table with filters (warehouse, status)
- Create/edit form with Bootstrap styling
- Delete confirmation with active reservations check
- Breadcrumb navigation

**Features:**
✅ One warehouse can have multiple showcases (ForeignKey relationship)
✅ Unique showcase names within each warehouse
✅ Display active reservation counts for each showcase
✅ Prevent deletion if showcase has active reservations
✅ Auto-select default warehouse when creating showcase
✅ Navigation link added to main navbar between "Касса" and "Склад"
✅ Active state highlighting in navigation

**Files created:**
- inventory/forms_showcase.py (ShowcaseForm)
- inventory/views/showcase.py (4 CBV views)
- inventory/templates/inventory/showcase/ (list, form, delete templates)

**Files modified:**
- inventory/urls.py (added showcase routes)
- inventory/forms.py (added Showcase import)
- templates/navbar.html (added "Витрины" link)

URL structure:
/inventory/showcases/ - list
/inventory/showcases/create/ - create
/inventory/showcases/<id>/edit/ - edit
/inventory/showcases/<id>/delete/ - delete

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

myproject/inventory/forms.py

@@ -5,7 +5,7 @@ from decimal import Decimal
 
 from .models import (
     Warehouse, Incoming, Sale, WriteOff, Transfer, Reservation, Inventory, InventoryLine, StockBatch,
-    TransferBatch, TransferItem
+    TransferBatch, TransferItem, Showcase
 )
 from products.models import Product
 
@@ -460,3 +460,4 @@ class TransferBulkForm(forms.Form):
                 raise ValidationError('Склад-источник и склад-назначение должны быть разными')
 
         return cleaned_data
+

myproject/inventory/forms_showcase.py

@@ -0,0 +1,73 @@
+# -*- coding: utf-8 -*-
+from django import forms
+from django.core.exceptions import ValidationError
+
+from .models import Showcase, Warehouse
+
+
+class ShowcaseForm(forms.ModelForm):
+    """
+    Форма для создания и редактирования витрин.
+    Витрина привязывается к складу и используется для выкладки готовых букетов.
+    """
+    class Meta:
+        model = Showcase
+        fields = ['name', 'warehouse', 'description', 'is_active']
+        widgets = {
+            'name': forms.TextInput(attrs={
+                'class': 'form-control',
+                'placeholder': 'Название витрины (например: Витрина №1, Витрина у входа)'
+            }),
+            'warehouse': forms.Select(attrs={'class': 'form-control'}),
+            'description': forms.Textarea(attrs={
+                'class': 'form-control',
+                'rows': 3,
+                'placeholder': 'Описание витрины, её расположение или особенности'
+            }),
+            'is_active': forms.CheckboxInput(attrs={'class': 'form-check-input'}),
+        }
+        labels = {
+            'name': 'Название витрины',
+            'warehouse': 'Склад',
+            'description': 'Описание',
+            'is_active': 'Активна',
+        }
+        help_texts = {
+            'warehouse': 'Склад, к которому привязана витрина',
+            'is_active': 'Неактивные витрины скрыты из списка выбора',
+        }
+
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+        # Фильтруем только активные склады
+        self.fields['warehouse'].queryset = Warehouse.objects.filter(is_active=True).order_by('name')
+
+        # Если создаём новую витрину и есть склад по умолчанию - предвыбираем его
+        if not self.instance.pk and not self.initial.get('warehouse'):
+            default_warehouse = Warehouse.objects.filter(
+                is_active=True,
+                is_default=True
+            ).first()
+            if default_warehouse:
+                self.initial['warehouse'] = default_warehouse.id
+
+    def clean_name(self):
+        """Проверка уникальности названия витрины в рамках склада"""
+        name = self.cleaned_data.get('name')
+        warehouse = self.cleaned_data.get('warehouse')
+
+        if name and warehouse:
+            # Проверяем уникальность названия в рамках склада
+            queryset = Showcase.objects.filter(name=name, warehouse=warehouse)
+
+            # При редактировании исключаем текущий экземпляр
+            if self.instance and self.instance.pk:
+                queryset = queryset.exclude(pk=self.instance.pk)
+
+            if queryset.exists():
+                raise ValidationError(
+                    f'Витрина с названием "{name}" уже существует на складе "{warehouse.name}". '
+                    'Пожалуйста, выберите другое название.'
+                )
+
+        return name

myproject/inventory/templates/inventory/showcase/delete.html

@@ -0,0 +1,135 @@
+{% extends "base.html" %}
+
+{% block title %}{{ title }}{% endblock %}
+
+{% block content %}
+<div class="container-fluid">
+  <!-- Header -->
+  <div class="row mb-4">
+    <div class="col-12">
+      <h1 class="mb-2 text-danger">
+        <i class="bi bi-exclamation-triangle me-2"></i>Удаление витрины
+      </h1>
+      <nav aria-label="breadcrumb">
+        <ol class="breadcrumb">
+          <li class="breadcrumb-item"><a href="{% url 'inventory:inventory-home' %}">Склад</a></li>
+          <li class="breadcrumb-item"><a href="{% url 'inventory:showcase-list' %}">Витрины</a></li>
+          <li class="breadcrumb-item active">Удаление</li>
+        </ol>
+      </nav>
+    </div>
+  </div>
+
+  <!-- Delete Confirmation -->
+  <div class="row">
+    <div class="col-lg-8">
+      <div class="card border-danger">
+        <div class="card-header bg-danger text-white">
+          <h5 class="mb-0">
+            <i class="bi bi-exclamation-triangle me-2"></i>Подтверждение удаления
+          </h5>
+        </div>
+        <div class="card-body">
+          <p class="lead">
+            Вы действительно хотите удалить витрину <strong>"{{ object.name }}"</strong>
+            на складе <strong>"{{ object.warehouse.name }}"</strong>?
+          </p>
+
+          {% if has_active_reservations %}
+            <div class="alert alert-danger">
+              <h6 class="alert-heading">
+                <i class="bi bi-x-circle me-2"></i>Невозможно удалить витрину
+              </h6>
+              <p class="mb-2">
+                На этой витрине есть <strong>{{ active_reservations.count }}</strong> активных резервов.
+                Сначала необходимо освободить или продать зарезервированные товары.
+              </p>
+
+              {% if active_reservations %}
+                <hr>
+                <p class="mb-2"><strong>Активные резервы:</strong></p>
+                <ul class="mb-0">
+                  {% for reservation in active_reservations|slice:":5" %}
+                    <li>{{ reservation.product.name }} — {{ reservation.quantity }} шт.</li>
+                  {% endfor %}
+                  {% if active_reservations.count > 5 %}
+                    <li class="text-muted">...и еще {{ active_reservations.count|add:"-5" }} резервов</li>
+                  {% endif %}
+                </ul>
+              {% endif %}
+            </div>
+
+            <div class="d-flex gap-2">
+              <a href="{% url 'inventory:showcase-list' %}" class="btn btn-secondary">
+                <i class="bi bi-arrow-left me-1"></i>Вернуться к списку
+              </a>
+              <a href="{% url 'inventory:reservation-list' %}?showcase={{ object.id }}" class="btn btn-info">
+                <i class="bi bi-eye me-1"></i>Просмотреть резервы
+              </a>
+            </div>
+          {% else %}
+            <div class="alert alert-warning">
+              <i class="bi bi-info-circle me-2"></i>
+              <strong>Внимание:</strong> Это действие нельзя отменить. Все данные о витрине будут удалены безвозвратно.
+            </div>
+
+            <form method="post">
+              {% csrf_token %}
+              <div class="d-flex gap-2">
+                <button type="submit" class="btn btn-danger">
+                  <i class="bi bi-trash me-1"></i>Да, удалить витрину
+                </button>
+                <a href="{% url 'inventory:showcase-list' %}" class="btn btn-secondary">
+                  <i class="bi bi-x-circle me-1"></i>Отмена
+                </a>
+              </div>
+            </form>
+          {% endif %}
+        </div>
+      </div>
+    </div>
+
+    <!-- Info Card -->
+    <div class="col-lg-4">
+      <div class="card">
+        <div class="card-header bg-light">
+          <h6 class="mb-0">Информация о витрине</h6>
+        </div>
+        <div class="card-body">
+          <dl class="row mb-0">
+            <dt class="col-sm-6">Название:</dt>
+            <dd class="col-sm-6 text-end">{{ object.name }}</dd>
+
+            <dt class="col-sm-6">Склад:</dt>
+            <dd class="col-sm-6 text-end">{{ object.warehouse.name }}</dd>
+
+            <dt class="col-sm-6">Статус:</dt>
+            <dd class="col-sm-6 text-end">
+              {% if object.is_active %}
+                <span class="badge bg-success">Активна</span>
+              {% else %}
+                <span class="badge bg-secondary">Неактивна</span>
+              {% endif %}
+            </dd>
+
+            <dt class="col-sm-6">Создана:</dt>
+            <dd class="col-sm-6 text-end">{{ object.created_at|date:"d.m.Y H:i" }}</dd>
+
+            <dt class="col-sm-6">Обновлена:</dt>
+            <dd class="col-sm-6 text-end">{{ object.updated_at|date:"d.m.Y H:i" }}</dd>
+
+            <dt class="col-sm-6">Активные резервы:</dt>
+            <dd class="col-sm-6 text-end">
+              {% if has_active_reservations %}
+                <span class="badge bg-danger">{{ active_reservations.count }}</span>
+              {% else %}
+                <span class="text-muted">—</span>
+              {% endif %}
+            </dd>
+          </dl>
+        </div>
+      </div>
+    </div>
+  </div>
+</div>
+{% endblock %}

myproject/inventory/templates/inventory/showcase/form.html

@@ -0,0 +1,151 @@
+{% extends "base.html" %}
+
+{% block title %}{{ title }}{% endblock %}
+
+{% block content %}
+<div class="container-fluid">
+  <!-- Header -->
+  <div class="row mb-4">
+    <div class="col-12">
+      <h1 class="mb-2">
+        <i class="bi bi-flower1 text-primary me-2"></i>{{ form_title }}
+      </h1>
+      <nav aria-label="breadcrumb">
+        <ol class="breadcrumb">
+          <li class="breadcrumb-item"><a href="{% url 'inventory:inventory-home' %}">Склад</a></li>
+          <li class="breadcrumb-item"><a href="{% url 'inventory:showcase-list' %}">Витрины</a></li>
+          <li class="breadcrumb-item active">{{ form_title }}</li>
+        </ol>
+      </nav>
+    </div>
+  </div>
+
+  <!-- Form -->
+  <div class="row">
+    <div class="col-lg-8">
+      <div class="card">
+        <div class="card-body">
+          <form method="post" novalidate>
+            {% csrf_token %}
+
+            {% if form.non_field_errors %}
+              <div class="alert alert-danger">
+                {{ form.non_field_errors }}
+              </div>
+            {% endif %}
+
+            <!-- Name -->
+            <div class="mb-3">
+              <label for="{{ form.name.id_for_label }}" class="form-label fw-semibold">
+                {{ form.name.label }}
+                <span class="text-danger">*</span>
+              </label>
+              {{ form.name }}
+              {% if form.name.errors %}
+                <div class="invalid-feedback d-block">
+                  {{ form.name.errors }}
+                </div>
+              {% endif %}
+              {% if form.name.help_text %}
+                <small class="form-text text-muted">{{ form.name.help_text }}</small>
+              {% endif %}
+            </div>
+
+            <!-- Warehouse -->
+            <div class="mb-3">
+              <label for="{{ form.warehouse.id_for_label }}" class="form-label fw-semibold">
+                {{ form.warehouse.label }}
+                <span class="text-danger">*</span>
+              </label>
+              {{ form.warehouse }}
+              {% if form.warehouse.errors %}
+                <div class="invalid-feedback d-block">
+                  {{ form.warehouse.errors }}
+                </div>
+              {% endif %}
+              {% if form.warehouse.help_text %}
+                <small class="form-text text-muted">{{ form.warehouse.help_text }}</small>
+              {% endif %}
+            </div>
+
+            <!-- Description -->
+            <div class="mb-3">
+              <label for="{{ form.description.id_for_label }}" class="form-label fw-semibold">
+                {{ form.description.label }}
+              </label>
+              {{ form.description }}
+              {% if form.description.errors %}
+                <div class="invalid-feedback d-block">
+                  {{ form.description.errors }}
+                </div>
+              {% endif %}
+              {% if form.description.help_text %}
+                <small class="form-text text-muted">{{ form.description.help_text }}</small>
+              {% endif %}
+            </div>
+
+            <!-- Is Active -->
+            <div class="mb-4">
+              <div class="form-check">
+                {{ form.is_active }}
+                <label class="form-check-label" for="{{ form.is_active.id_for_label }}">
+                  {{ form.is_active.label }}
+                </label>
+                {% if form.is_active.help_text %}
+                  <div><small class="form-text text-muted">{{ form.is_active.help_text }}</small></div>
+                {% endif %}
+              </div>
+              {% if form.is_active.errors %}
+                <div class="invalid-feedback d-block">
+                  {{ form.is_active.errors }}
+                </div>
+              {% endif %}
+            </div>
+
+            <!-- Buttons -->
+            <div class="d-flex gap-2">
+              <button type="submit" class="btn btn-primary">
+                <i class="bi bi-check-circle me-1"></i>{{ submit_text }}
+              </button>
+              <a href="{% url 'inventory:showcase-list' %}" class="btn btn-secondary">
+                <i class="bi bi-x-circle me-1"></i>Отмена
+              </a>
+            </div>
+          </form>
+        </div>
+      </div>
+    </div>
+
+    <!-- Info Card (for edit mode) -->
+    {% if object %}
+    <div class="col-lg-4">
+      <div class="card">
+        <div class="card-header bg-light">
+          <h6 class="mb-0">Информация о витрине</h6>
+        </div>
+        <div class="card-body">
+          <dl class="row mb-0">
+            <dt class="col-sm-6">Создана:</dt>
+            <dd class="col-sm-6 text-end">{{ object.created_at|date:"d.m.Y H:i" }}</dd>
+
+            <dt class="col-sm-6">Обновлена:</dt>
+            <dd class="col-sm-6 text-end">{{ object.updated_at|date:"d.m.Y H:i" }}</dd>
+
+            {% if active_reservations_count is not None %}
+            <dt class="col-sm-6">Активные резервы:</dt>
+            <dd class="col-sm-6 text-end">
+              {% if active_reservations_count > 0 %}
+                <span class="badge bg-info">{{ active_reservations_count }}</span>
+              {% else %}
+                <span class="text-muted">—</span>
+              {% endif %}
+            </dd>
+            {% endif %}
+          </dl>
+        </div>
+      </div>
+    </div>
+    {% endif %}
+  </div>
+</div>
+{% endblock %}

myproject/inventory/templates/inventory/showcase/list.html

@@ -0,0 +1,162 @@
+{% extends "base.html" %}
+
+{% block title %}{{ title }}{% endblock %}
+
+{% block content %}
+<div class="container-fluid">
+  <!-- Header -->
+  <div class="row mb-4">
+    <div class="col-12">
+      <div class="d-flex justify-content-between align-items-center">
+        <div>
+          <h1 class="mb-2">
+            <i class="bi bi-flower1 text-primary me-2"></i>Витрины
+          </h1>
+          <nav aria-label="breadcrumb">
+            <ol class="breadcrumb">
+              <li class="breadcrumb-item"><a href="{% url 'inventory:inventory-home' %}">Склад</a></li>
+              <li class="breadcrumb-item active">Витрины</li>
+            </ol>
+          </nav>
+        </div>
+        <div>
+          <a href="{% url 'inventory:showcase-create' %}" class="btn btn-primary">
+            <i class="bi bi-plus-circle me-1"></i>Создать витрину
+          </a>
+        </div>
+      </div>
+    </div>
+  </div>
+
+  <!-- Filters -->
+  <div class="row mb-3">
+    <div class="col-12">
+      <div class="card">
+        <div class="card-body">
+          <form method="get" class="row g-3">
+            <div class="col-md-4">
+              <label class="form-label">Склад</label>
+              <select name="warehouse" class="form-select">
+                <option value="">Все склады</option>
+                {% for warehouse in warehouses %}
+                <option value="{{ warehouse.id }}" {% if request.GET.warehouse == warehouse.id|stringformat:"s" %}selected{% endif %}>
+                  {{ warehouse.name }}
+                </option>
+                {% endfor %}
+              </select>
+            </div>
+            <div class="col-md-4">
+              <label class="form-label">Статус</label>
+              <select name="is_active" class="form-select">
+                <option value="">Все</option>
+                <option value="1" {% if request.GET.is_active == "1" %}selected{% endif %}>Только активные</option>
+                <option value="0" {% if request.GET.is_active == "0" %}selected{% endif %}>Только неактивные</option>
+              </select>
+            </div>
+            <div class="col-md-4 d-flex align-items-end">
+              <button type="submit" class="btn btn-secondary me-2">
+                <i class="bi bi-funnel me-1"></i>Применить
+              </button>
+              <a href="{% url 'inventory:showcase-list' %}" class="btn btn-outline-secondary">
+                <i class="bi bi-x-circle me-1"></i>Сбросить
+              </a>
+            </div>
+          </form>
+        </div>
+      </div>
+    </div>
+  </div>
+
+  <!-- Showcases List -->
+  <div class="row">
+    <div class="col-12">
+      {% if showcases %}
+        <div class="card">
+          <div class="card-body">
+            <div class="table-responsive">
+              <table class="table table-hover align-middle">
+                <thead class="table-light">
+                  <tr>
+                    <th>Название</th>
+                    <th>Склад</th>
+                    <th>Описание</th>
+                    <th class="text-center">Активные резервы</th>
+                    <th class="text-center">Статус</th>
+                    <th class="text-center">Действия</th>
+                  </tr>
+                </thead>
+                <tbody>
+                  {% regroup showcases by warehouse as showcases_by_warehouse %}
+                  {% for warehouse_group in showcases_by_warehouse %}
+                    <!-- Warehouse Header Row -->
+                    <tr class="table-secondary">
+                      <td colspan="6" class="fw-bold">
+                        <i class="bi bi-building me-2"></i>{{ warehouse_group.grouper.name }}
+                      </td>
+                    </tr>
+                    <!-- Showcases in this warehouse -->
+                    {% for showcase in warehouse_group.list %}
+                    <tr>
+                      <td>
+                        <strong>{{ showcase.name }}</strong>
+                      </td>
+                      <td>
+                        <span class="text-muted">{{ showcase.warehouse.name }}</span>
+                      </td>
+                      <td>
+                        {% if showcase.description %}
+                          <small class="text-muted">{{ showcase.description|truncatewords:10 }}</small>
+                        {% else %}
+                          <small class="text-muted fst-italic">—</small>
+                        {% endif %}
+                      </td>
+                      <td class="text-center">
+                        {% if showcase.active_reservations_count > 0 %}
+                          <span class="badge bg-info">{{ showcase.active_reservations_count }}</span>
+                        {% else %}
+                          <span class="text-muted">—</span>
+                        {% endif %}
+                      </td>
+                      <td class="text-center">
+                        {% if showcase.is_active %}
+                          <span class="badge bg-success">Активна</span>
+                        {% else %}
+                          <span class="badge bg-secondary">Неактивна</span>
+                        {% endif %}
+                      </td>
+                      <td class="text-center">
+                        <a href="{% url 'inventory:showcase-update' showcase.pk %}"
+                           class="btn btn-sm btn-outline-primary"
+                           title="Редактировать">
+                          <i class="bi bi-pencil"></i>
+                        </a>
+                        <a href="{% url 'inventory:showcase-delete' showcase.pk %}"
+                           class="btn btn-sm btn-outline-danger ms-1"
+                           title="Удалить">
+                          <i class="bi bi-trash"></i>
+                        </a>
+                      </td>
+                    </tr>
+                    {% endfor %}
+                  {% endfor %}
+                </tbody>
+              </table>
+            </div>
+          </div>
+        </div>
+      {% else %}
+        <div class="card">
+          <div class="card-body text-center py-5">
+            <i class="bi bi-flower1 text-muted" style="font-size: 4rem;"></i>
+            <h4 class="mt-3 text-muted">Витрин не найдено</h4>
+            <p class="text-muted">Создайте первую витрину для выкладки букетов</p>
+            <a href="{% url 'inventory:showcase-create' %}" class="btn btn-primary mt-2">
+              <i class="bi bi-plus-circle me-1"></i>Создать витрину
+            </a>
+          </div>
+        </div>
+      {% endif %}
+    </div>
+  </div>
+</div>
+{% endblock %}

myproject/inventory/urls.py

@@ -26,6 +26,8 @@ from .views import (
     # StockMovement
     StockMovementListView,
 )
+# Showcase views
+from .views.showcase import ShowcaseListView, ShowcaseCreateView, ShowcaseUpdateView, ShowcaseDeleteView
 from . import views
 
 app_name = 'inventory'
@@ -95,4 +97,10 @@ urlpatterns = [
 
     # ==================== MOVEMENT (READ ONLY) ====================
     path('movements/', StockMovementListView.as_view(), name='movement-list'),
+
+    # ==================== SHOWCASE ====================
+    path('showcases/', ShowcaseListView.as_view(), name='showcase-list'),
+    path('showcases/create/', ShowcaseCreateView.as_view(), name='showcase-create'),
+    path('showcases/<int:pk>/edit/', ShowcaseUpdateView.as_view(), name='showcase-update'),
+    path('showcases/<int:pk>/delete/', ShowcaseDeleteView.as_view(), name='showcase-delete'),
 ]

myproject/inventory/views/showcase.py

@@ -0,0 +1,175 @@
+# -*- coding: utf-8 -*-
+from django.contrib.auth.decorators import login_required
+from django.contrib import messages
+from django.shortcuts import render, redirect, get_object_or_404
+from django.db.models import Count, Q
+from django.views.generic import ListView, CreateView, UpdateView, DeleteView
+from django.urls import reverse_lazy
+from django.utils.decorators import method_decorator
+
+from inventory.models import Showcase, Reservation
+from inventory.forms_showcase import ShowcaseForm
+
+
+@method_decorator(login_required, name='dispatch')
+class ShowcaseListView(ListView):
+    """
+    Список всех витрин с группировкой по складам.
+    Отображает информацию о количестве активных резервов на каждой витрине.
+    """
+    model = Showcase
+    template_name = 'inventory/showcase/list.html'
+    context_object_name = 'showcases'
+
+    def get_queryset(self):
+        """
+        Получаем витрины с аннотацией количества активных резервов.
+        Сортируем по складу и названию.
+        """
+        queryset = Showcase.objects.select_related('warehouse').annotate(
+            active_reservations_count=Count(
+                'reservations',
+                filter=Q(reservations__status='reserved')
+            )
+        ).order_by('warehouse__name', 'name')
+
+        # Фильтрация по складу, если указан GET-параметр
+        warehouse_id = self.request.GET.get('warehouse')
+        if warehouse_id:
+            queryset = queryset.filter(warehouse_id=warehouse_id)
+
+        # Фильтрация по статусу активности
+        is_active = self.request.GET.get('is_active')
+        if is_active == '1':
+            queryset = queryset.filter(is_active=True)
+        elif is_active == '0':
+            queryset = queryset.filter(is_active=False)
+
+        return queryset
+
+    def get_context_data(self, **kwargs):
+        context = super().get_context_data(**kwargs)
+        context['title'] = 'Витрины'
+
+        # Добавляем информацию для фильтров
+        from inventory.models import Warehouse
+        context['warehouses'] = Warehouse.objects.filter(is_active=True).order_by('name')
+
+        return context
+
+
+@method_decorator(login_required, name='dispatch')
+class ShowcaseCreateView(CreateView):
+    """
+    Создание новой витрины.
+    """
+    model = Showcase
+    form_class = ShowcaseForm
+    template_name = 'inventory/showcase/form.html'
+    success_url = reverse_lazy('inventory:showcase-list')
+
+    def form_valid(self, form):
+        """Сохраняем витрину и показываем сообщение об успехе"""
+        response = super().form_valid(form)
+        messages.success(
+            self.request,
+            f'Витрина "{self.object.name}" успешно создана на складе "{self.object.warehouse.name}"'
+        )
+        return response
+
+    def get_context_data(self, **kwargs):
+        context = super().get_context_data(**kwargs)
+        context['title'] = 'Создание витрины'
+        context['form_title'] = 'Новая витрина'
+        context['submit_text'] = 'Создать витрину'
+        return context
+
+
+@method_decorator(login_required, name='dispatch')
+class ShowcaseUpdateView(UpdateView):
+    """
+    Редактирование существующей витрины.
+    """
+    model = Showcase
+    form_class = ShowcaseForm
+    template_name = 'inventory/showcase/form.html'
+    success_url = reverse_lazy('inventory:showcase-list')
+
+    def form_valid(self, form):
+        """Сохраняем изменения и показываем сообщение об успехе"""
+        response = super().form_valid(form)
+        messages.success(
+            self.request,
+            f'Витрина "{self.object.name}" успешно обновлена'
+        )
+        return response
+
+    def get_context_data(self, **kwargs):
+        context = super().get_context_data(**kwargs)
+        context['title'] = f'Редактирование витрины: {self.object.name}'
+        context['form_title'] = f'Редактирование: {self.object.name}'
+        context['submit_text'] = 'Сохранить изменения'
+
+        # Добавляем информацию о резервах на витрине
+        context['active_reservations_count'] = Reservation.objects.filter(
+            showcase=self.object,
+            status='reserved'
+        ).count()
+
+        return context
+
+
+@method_decorator(login_required, name='dispatch')
+class ShowcaseDeleteView(DeleteView):
+    """
+    Удаление витрины с подтверждением.
+    Проверяет наличие активных резервов перед удалением.
+    """
+    model = Showcase
+    template_name = 'inventory/showcase/delete.html'
+    success_url = reverse_lazy('inventory:showcase-list')
+
+    def get_context_data(self, **kwargs):
+        context = super().get_context_data(**kwargs)
+        context['title'] = f'Удаление витрины: {self.object.name}'
+
+        # Проверяем наличие активных резервов
+        active_reservations = Reservation.objects.filter(
+            showcase=self.object,
+            status='reserved'
+        ).select_related('product')
+
+        context['active_reservations'] = active_reservations
+        context['has_active_reservations'] = active_reservations.exists()
+
+        return context
+
+    def delete(self, request, *args, **kwargs):
+        """Проверяем наличие активных резервов перед удалением"""
+        showcase = self.get_object()
+
+        # Проверка активных резервов
+        active_reservations_count = Reservation.objects.filter(
+            showcase=showcase,
+            status='reserved'
+        ).count()
+
+        if active_reservations_count > 0:
+            messages.error(
+                request,
+                f'Невозможно удалить витрину "{showcase.name}": '
+                f'на ней есть {active_reservations_count} активных резервов. '
+                'Сначала освободите или продайте зарезервированные товары.'
+            )
+            return redirect('inventory:showcase-delete', pk=showcase.pk)
+
+        # Удаляем витрину
+        showcase_name = showcase.name
+        response = super().delete(request, *args, **kwargs)
+
+        messages.success(
+            request,
+            f'Витрина "{showcase_name}" успешно удалена'
+        )
+
+        return response

myproject/templates/navbar.html

@@ -45,7 +45,10 @@
                         <a class="nav-link {% if request.resolver_match.namespace == 'pos' %}active{% endif %}" href="{% url 'pos:terminal' %}">Касса</a>
                     </li>
                     <li class="nav-item">
-                        <a class="nav-link {% if request.resolver_match.namespace == 'inventory' %}active{% endif %}" href="{% url 'inventory:inventory-home' %}">Склад</a>
+                        <a class="nav-link {% if request.resolver_match.namespace == 'inventory' and 'showcase' in request.resolver_match.url_name %}active{% endif %}" href="{% url 'inventory:showcase-list' %}">Витрины</a>
+                    </li>
+                    <li class="nav-item">
+                        <a class="nav-link {% if request.resolver_match.namespace == 'inventory' and 'showcase' not in request.resolver_match.url_name %}active{% endif %}" href="{% url 'inventory:inventory-home' %}">Склад</a>
                     </li>
                 {% endif %}
             </ul>