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@ -1,5 +1,13 @@
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from django.contrib import admin
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from .models import Warehouse, StorageLocation, StockOperation
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from django.urls import path
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from django.shortcuts import render
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import matplotlib.pyplot as plt
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from io import BytesIO
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import base64
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import matplotlib
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matplotlib.use('Agg')
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@admin.register(Warehouse)
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class WarehouseAdmin(admin.ModelAdmin):
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@ -19,3 +27,43 @@ class StockOperationAdmin(admin.ModelAdmin):
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list_display = ('product', 'warehouse', 'operation_type', 'quantity', 'operation_date')
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search_fields = ('product__name', 'warehouse__name', 'operation_type')
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list_filter = ('operation_type', 'operation_date')
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def changelist_view(self, request, extra_context=None):
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extra_context = extra_context or {}
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extra_context['custom_button'] = {
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'url': 'statistics/',
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'label': 'Просмотреть статистику'
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}
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return super().changelist_view(request, extra_context)
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def get_urls(self):
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urls = super().get_urls()
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custom_urls = [
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path('statistics/', self.admin_site.admin_view(self.statistics_view), name='stock_operation_statistics'),
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]
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return custom_urls + urls
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def statistics_view(self, request):
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operations = StockOperation.objects.all()
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incoming_count = operations.filter(operation_type='Incoming').count()
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outgoing_count = operations.filter(operation_type='Outgoing').count()
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transfer_count = operations.filter(operation_type='Transfer').count()
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writeoff_count = operations.filter(operation_type='WriteOff').count()
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labels = ['Incoming', 'Outgoing', 'Transfer', 'WriteOff']
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data = [incoming_count, outgoing_count, transfer_count, writeoff_count]
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plt.figure(figsize=(6, 6))
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plt.pie(data, labels=labels, autopct='%1.1f%%', startangle=90)
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plt.axis('equal')
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buffer = BytesIO()
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plt.savefig(buffer, format='png')
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buffer.seek(0)
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image_png = buffer.getvalue()
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buffer.close()
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chart = base64.b64encode(image_png).decode('utf-8')
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context = {'chart': chart}
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return render(request, 'admin/warehouse/stock_statistics.html', context)
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