72 lines
3.0 KiB
Python
72 lines
3.0 KiB
Python
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"""仪表盘聚合业务服务层
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将 dashboard_routes 中的聚合查询与统计编排下沉到此，
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路由层只做依赖注入与响应返回。
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"""
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from sqlalchemy import func, select
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from sqlalchemy.ext.asyncio import AsyncSession
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from inventory.models import Customer, Inventory, Product, PurchaseOrder, SalesOrder, Supplier, Warehouse
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class DashboardService:
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"""仪表盘统计服务"""
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@staticmethod
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async def get_dashboard(db_session: AsyncSession) -> dict:
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material_count = await db_session.scalar(
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select(func.count(Product.id)).where(Product.is_active == True, Product.item_type == "material")
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) or 0
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finished_product_count = await db_session.scalar(
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select(func.count(Product.id)).where(Product.is_active == True, Product.item_type == "finished")
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) or 0
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supplier_count = await db_session.scalar(select(func.count(Supplier.id)).where(Supplier.is_active == True)) or 0
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customer_count = await db_session.scalar(select(func.count(Customer.id)).where(Customer.is_active == True)) or 0
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warehouse_count = await db_session.scalar(select(func.count(Warehouse.id)).where(Warehouse.is_active == True)) or 0
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total_stock = await db_session.scalar(
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select(func.sum(Inventory.quantity))
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.join(Product, Inventory.product_id == Product.id)
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.where(Product.item_type == "material")
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) or 0
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total_value = await db_session.scalar(
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select(func.sum(Inventory.quantity * Product.cost_price))
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.join(Product, Inventory.product_id == Product.id)
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.where(Product.item_type == "material")
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) or 0
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pending_purchase = await db_session.scalar(
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select(func.count(PurchaseOrder.id)).where(PurchaseOrder.status == "pending")
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) or 0
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pending_sales = await db_session.scalar(
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select(func.count(SalesOrder.id)).where(SalesOrder.status == "pending")
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) or 0
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low_stock_products = await db_session.execute(
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select(Product, Inventory)
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.join(Inventory, Product.id == Inventory.product_id)
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.where(Product.item_type == "material")
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.where(Inventory.quantity <= Product.min_stock)
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.limit(10)
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)
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low_stock = [
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{"id": p.id, "name": p.name, "sku": p.sku, "quantity": i.quantity, "min_stock": p.min_stock}
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for p, i in low_stock_products.all()
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]
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return {
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"finished_product_count": finished_product_count,
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"material_count": material_count,
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"supplier_count": supplier_count,
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"customer_count": customer_count,
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"warehouse_count": warehouse_count,
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"total_stock": total_stock,
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"total_value": round(total_value, 2),
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"pending_purchase": pending_purchase,
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"pending_sales": pending_sales,
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"low_stock_products": low_stock,
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}
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dashboard_service = DashboardService()
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