278 lines
10 KiB
Python
278 lines
10 KiB
Python
from app.extensions import db
|
||
from app.models.bom import BomTable
|
||
from app.models.base import MaterialBase
|
||
from app.models.inbound.buy import StockBuy
|
||
from sqlalchemy import func, distinct, or_, case
|
||
import uuid
|
||
from datetime import datetime
|
||
|
||
|
||
class BomService:
|
||
# ====================== 新版 BOM 逻辑（基于 bom_no） ======================
|
||
|
||
@staticmethod
|
||
def generate_bom_no():
|
||
"""生成唯一的 BOM 编号 (作为默认备选)"""
|
||
timestamp = datetime.now().strftime('%Y%m%d%H%M%S')
|
||
unique = str(uuid.uuid4())[:8]
|
||
return f'BOM-{timestamp}-{unique}'
|
||
|
||
@staticmethod
|
||
def get_bom_list(keyword=None, active_only=False):
|
||
"""
|
||
获取所有 BOM 配方（按 bom_no + version 分组）
|
||
支持模糊搜索：BOM编号、父件名称/规格、子件名称/规格
|
||
"""
|
||
# 1. 关键词过滤：先找出符合条件的 (bom_no, version) 组合
|
||
query_base = db.session.query(
|
||
BomTable.bom_no,
|
||
BomTable.version
|
||
).join(
|
||
MaterialBase, BomTable.parent_id == MaterialBase.id
|
||
)
|
||
|
||
# ★ 过滤禁用状态
|
||
if active_only:
|
||
query_base = query_base.filter(BomTable.is_enabled == True)
|
||
|
||
if keyword:
|
||
kw = f'%{keyword}%'
|
||
# 关联子件表以支持子件搜索
|
||
child_alias = db.aliased(MaterialBase)
|
||
query_base = query_base.outerjoin(
|
||
child_alias, BomTable.child_id == child_alias.id
|
||
).filter(
|
||
or_(
|
||
BomTable.bom_no.ilike(kw),
|
||
MaterialBase.name.ilike(kw),
|
||
MaterialBase.spec_model.ilike(kw),
|
||
child_alias.name.ilike(kw),
|
||
child_alias.spec_model.ilike(kw)
|
||
)
|
||
)
|
||
|
||
# 获取符合条件的唯一组合
|
||
target_pairs = query_base.distinct().all()
|
||
|
||
if not target_pairs:
|
||
return []
|
||
|
||
# 2. 聚合查询详情
|
||
results = []
|
||
for bom_no, version in target_pairs:
|
||
summary = db.session.query(
|
||
BomTable.parent_id,
|
||
MaterialBase.name.label('parent_name'),
|
||
MaterialBase.spec_model.label('parent_spec'),
|
||
BomTable.is_enabled,
|
||
func.count(BomTable.child_id).label('child_count')
|
||
).join(
|
||
MaterialBase, BomTable.parent_id == MaterialBase.id
|
||
).filter(
|
||
BomTable.bom_no == bom_no,
|
||
BomTable.version == version
|
||
).group_by(
|
||
BomTable.parent_id, MaterialBase.name, MaterialBase.spec_model, BomTable.is_enabled
|
||
).first()
|
||
|
||
if summary:
|
||
results.append({
|
||
'bom_no': bom_no,
|
||
'version': version,
|
||
'parent_id': summary.parent_id,
|
||
'parent_name': summary.parent_name,
|
||
'parent_spec': summary.parent_spec or '',
|
||
'is_enabled': summary.is_enabled,
|
||
'child_count': summary.child_count
|
||
})
|
||
|
||
results.sort(key=lambda x: (x['bom_no'], x['version']), reverse=True)
|
||
return results
|
||
|
||
@staticmethod
|
||
def get_bom_detail(bom_no, version=None):
|
||
"""
|
||
根据 bom_no (和 version) 获取配方详情
|
||
"""
|
||
query = db.session.query(
|
||
BomTable,
|
||
MaterialBase.name.label('child_name'),
|
||
MaterialBase.spec_model.label('child_spec')
|
||
).join(
|
||
MaterialBase, BomTable.child_id == MaterialBase.id
|
||
).filter(
|
||
BomTable.bom_no == bom_no
|
||
)
|
||
|
||
if version:
|
||
query = query.filter(BomTable.version == version)
|
||
else:
|
||
latest_ver = db.session.query(BomTable.version).filter_by(bom_no=bom_no) \
|
||
.order_by(BomTable.version.desc()).limit(1).scalar()
|
||
if not latest_ver:
|
||
return None
|
||
query = query.filter(BomTable.version == latest_ver)
|
||
|
||
rows = query.all()
|
||
if not rows:
|
||
return None
|
||
|
||
first = rows[0]
|
||
parent_id = first.BomTable.parent_id
|
||
parent_material = MaterialBase.query.get(parent_id)
|
||
|
||
children = []
|
||
for bom, child_name, child_spec in rows:
|
||
children.append({
|
||
'child_id': bom.child_id,
|
||
'child_name': child_name,
|
||
'child_spec': child_spec or '',
|
||
'dosage': float(bom.dosage) if bom.dosage else 0.0,
|
||
'remark': bom.remark or ''
|
||
})
|
||
|
||
return {
|
||
'bom_no': bom_no,
|
||
'version': first.BomTable.version,
|
||
'parent_id': parent_id,
|
||
'parent_name': parent_material.name if parent_material else '',
|
||
'parent_spec': parent_material.spec_model if parent_material else '',
|
||
'is_enabled': first.BomTable.is_enabled,
|
||
'children': children
|
||
}
|
||
|
||
@staticmethod
|
||
def save_bom(data):
|
||
"""保存 BOM (支持多版本)，新增跨版本内容查重"""
|
||
bom_no = data.get('bom_no')
|
||
version = data.get('version', 'V1.0')
|
||
parent_id = data['parent_id']
|
||
children = data['children']
|
||
is_enabled = data.get('is_enabled', True)
|
||
|
||
if not bom_no:
|
||
raise ValueError('BOM编号不能为空')
|
||
|
||
for child in children:
|
||
if child['child_id'] == parent_id:
|
||
raise ValueError('父件与子件不能是同一物料')
|
||
|
||
# ===== 跨版本内容查重 =====
|
||
# 将当前提交的 children 转换为可比较的集合 (child_id, dosage)
|
||
current_children_set = set()
|
||
for child in children:
|
||
# 用 (child_id, dosage) 元组表示，dosage 转为整数比较
|
||
dosage_val = int(child.get('dosage', 0)) if child.get('dosage') else 0
|
||
current_children_set.add((child['child_id'], dosage_val))
|
||
|
||
# 查询该 bom_no 下所有其他版本的子件配置
|
||
existing_versions = db.session.query(
|
||
BomTable.version,
|
||
BomTable.child_id,
|
||
BomTable.dosage
|
||
).filter(
|
||
BomTable.bom_no == bom_no,
|
||
BomTable.version != version # 排除当前正在保存的版本
|
||
).all()
|
||
|
||
# 按版本分组，构建每个版本的子件集合
|
||
version_children = {}
|
||
for ver, child_id, dosage in existing_versions:
|
||
if ver not in version_children:
|
||
version_children[ver] = set()
|
||
dosage_val = int(dosage) if dosage else 0
|
||
version_children[ver].add((child_id, dosage_val))
|
||
|
||
# 比对每个版本
|
||
for ver, existing_set in version_children.items():
|
||
if current_children_set == existing_set:
|
||
raise ValueError(f'保存失败！当前子件配置与已有版本 {ver} 完全一致，请勿重复保存')
|
||
|
||
# ===== 执行保存 =====
|
||
# 仅删除当前版本的旧记录
|
||
BomTable.query.filter_by(bom_no=bom_no, version=version).delete()
|
||
|
||
for child in children:
|
||
bom = BomTable(
|
||
bom_no=bom_no,
|
||
version=version,
|
||
parent_id=parent_id,
|
||
child_id=child['child_id'],
|
||
dosage=child.get('dosage', 0),
|
||
remark=child.get('remark', ''),
|
||
is_enabled=is_enabled
|
||
)
|
||
db.session.add(bom)
|
||
|
||
db.session.commit()
|
||
return bom_no
|
||
|
||
@staticmethod
|
||
def get_bom_with_stock_by_bom_no(bom_no):
|
||
"""
|
||
根据 bom_no 获取配方详情，并计算：
|
||
1. 总可用库存
|
||
2. 最大可生产套数
|
||
3. ★ 聚合库位信息 (warehouse_locations)
|
||
"""
|
||
detail = BomService.get_bom_detail(bom_no)
|
||
if not detail:
|
||
return None
|
||
|
||
for child in detail['children']:
|
||
# 1. 查询该子件的总库存
|
||
stock_qty = db.session.query(
|
||
func.coalesce(func.sum(StockBuy.available_quantity), 0)
|
||
).filter(
|
||
StockBuy.base_id == child['child_id']
|
||
).scalar() or 0
|
||
|
||
# 2. ★ 查询该子件涉及的所有库位，并去重拼接 (PostgreSQL 使用 string_agg)
|
||
# 注意：这里假设主要是 stock_buy 表，如果是成品或半成品也需要做类似 Union 查询
|
||
# 为简化，这里演示只查 stock_buy 的库位
|
||
locations = db.session.query(
|
||
# 去除空值和重复值
|
||
func.string_agg(distinct(StockBuy.warehouse_location), ', ')
|
||
).filter(
|
||
StockBuy.base_id == child['child_id'],
|
||
StockBuy.available_quantity > 0, # 只看有货的库位
|
||
StockBuy.warehouse_location != None,
|
||
StockBuy.warehouse_location != ''
|
||
).scalar()
|
||
|
||
child['current_stock'] = float(stock_qty)
|
||
child['warehouse_location'] = locations or '' # 返回给前端
|
||
|
||
dosage = child['dosage']
|
||
child['max_producible'] = int(stock_qty // dosage) if dosage > 0 else 0
|
||
|
||
return detail
|
||
|
||
# ====================== 兼容旧接口 ======================
|
||
@staticmethod
|
||
def get_bom_no_by_parent(parent_id):
|
||
row = BomTable.query.filter_by(parent_id=parent_id).order_by(BomTable.version.desc()).first()
|
||
return row.bom_no if row else None
|
||
|
||
@staticmethod
|
||
def create_or_update_bom(parent_id, child_list, bom_no=None, version='V1.0'):
|
||
if not bom_no:
|
||
existing = BomTable.query.filter_by(parent_id=parent_id).first()
|
||
bom_no = existing.bom_no if existing else BomService.generate_bom_no()
|
||
|
||
BomTable.query.filter_by(bom_no=bom_no, version=version).delete()
|
||
for item in child_list:
|
||
bom = BomTable(
|
||
bom_no=bom_no, version=version, parent_id=parent_id,
|
||
child_id=item['child_id'], dosage=item.get('dosage', 0), remark=item.get('remark', '')
|
||
)
|
||
db.session.add(bom)
|
||
db.session.commit()
|
||
return True
|
||
|
||
@staticmethod
|
||
def get_bom_with_stock(parent_id):
|
||
bom_no = BomService.get_bom_no_by_parent(parent_id)
|
||
if not bom_no: return []
|
||
detail = BomService.get_bom_with_stock_by_bom_no(bom_no)
|
||
return detail['children'] if detail else [] |