24 lines
1.5 KiB
Python
24 lines
1.5 KiB
Python
"""不可行分配的容量说明；容量上界不能替代产品范围和双证引用的联合求解。"""
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from decimal import Decimal
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def allocation_diagnostics(demands, purchases, transports):
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rows = []
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for kind, permits in [('purchase', purchases), ('transport', transports)]:
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for unit in sorted({s.unit for s in demands}):
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sources = [s for s in demands if s.unit == unit]
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products = {s.product_id for s in sources}
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eligible = [p for p in permits if p.product_ids & products]
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demand = sum((s.quantity for s in sources), Decimal(0))
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foreign = any(p.unit != unit for p in eligible)
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available = sum((p.available for p in eligible if p.unit == unit), Decimal(0))
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gap = max(Decimal(0), demand - available)
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reason = ('存在异单位证件，请逐来源人工填写换算量；不能按证面余额推算可覆盖量'
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if foreign else '余额不足，请补充该证种额度' if gap else
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'总余额仅为上界；请核对每个合同产品范围、运输引用关系及人工分配约束')
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rows.append({'certType': kind, 'sourceIds': [s.source_id for s in sources],
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'unit': unit, 'demand': format(demand, 'f'),
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'availableUpperBound': None if foreign else format(available, 'f'),
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'gapLowerBound': None if foreign else format(gap, 'f'), 'reason': reason})
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return rows
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