feat: 新增后台复制店铺商品目录接口
支持按用户ID复制商品类型、专区与商品，OSS图片独立拷贝，并提供覆盖/补充两种模式。 Co-authored-by: Cursor <cursoragent@cursor.com>
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XingQue
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backend/services/__init__.py
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backend/services/__init__.py
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backend/services/shop_copy_service.py
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backend/services/shop_copy_service.py
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"""
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店铺商品目录复制服务：复制店铺商品类型、专区、商品（含 OSS 图片独立拷贝）。
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"""
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import logging
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import time
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import uuid
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from django.db import transaction
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from products.models import Shangpin, ShangpinZhuanqu
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from shop.models import Dianpu, ShangpinLeixingDianpu
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from utils.oss_utils import copy_in_oss, delete_from_oss, _url_to_oss_key
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logger = logging.getLogger('houtai')
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COPY_MODE_REPLACE = 'replace'
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COPY_MODE_APPEND = 'append'
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class ShopCopyError(Exception):
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def __init__(self, message, code=400):
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super().__init__(message)
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self.message = message
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self.code = code
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def resolve_dianpu_by_user_uid(user_uid):
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"""通过小程序用户 ID（YonghuPingzheng.yonghu，全局唯一）定位店铺"""
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uid = str(user_uid or '').strip()
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if not uid:
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raise ShopCopyError('用户ID不能为空')
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try:
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return Dianpu.objects.select_related('pingzheng').get(pingzheng__yonghu=uid)
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except Dianpu.DoesNotExist:
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raise ShopCopyError(f'未找到用户ID {uid} 对应的店铺', 404)
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def _gen_dest_key(target_dianpu_id, category, src_url):
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src_key = _url_to_oss_key(src_url)
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ext = 'png'
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if src_key and '.' in src_key:
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ext = src_key.rsplit('.', 1)[-1].lower() or 'png'
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ts = int(time.time() * 1000)
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rand = uuid.uuid4().hex[:8]
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return f"dianpu/shangpin/{category}/{target_dianpu_id}_{ts}_{rand}.{ext}"
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def _copy_image_url(src_url, target_dianpu_id, category):
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"""复制 OSS 图片到目标店铺独立路径，返回相对 URL"""
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if not src_url:
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return None
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dest_key = _gen_dest_key(target_dianpu_id, category, src_url)
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if not copy_in_oss(src_url, dest_key):
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raise ShopCopyError(f'图片复制失败: {src_url}')
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return dest_key
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def _clear_target_catalog_db_only(target_dianpu):
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"""全部覆盖模式：仅删除目标店铺商品目录 DB 记录，返回待清理的 OSS URL"""
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dianpu_id = target_dianpu.id
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oss_to_delete = []
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products = list(Shangpin.query.filter(dianpu_id=dianpu_id))
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for p in products:
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if p.tupian_url:
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oss_to_delete.append(p.tupian_url)
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if p.guize_tupian:
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oss_to_delete.append(p.guize_tupian)
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if products:
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Shangpin.query.filter(dianpu_id=dianpu_id).delete()
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ShangpinZhuanqu.query.filter(dianpu_id=dianpu_id).delete()
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types = list(ShangpinLeixingDianpu.query.filter(dianpu_id=dianpu_id))
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for t in types:
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if t.tupian_url:
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oss_to_delete.append(t.tupian_url)
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if types:
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ShangpinLeixingDianpu.query.filter(dianpu_id=dianpu_id).delete()
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return oss_to_delete
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def _delete_oss_urls(urls):
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for url in urls:
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if url:
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delete_from_oss(url)
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def _pre_copy_source_images(source_dianpu, target_dianpu):
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"""
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预复制源店铺所有图片到目标店铺 OSS 路径。
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返回结构化的预复制数据，供事务内写库使用。
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"""
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src_id = source_dianpu.id
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tgt_id = target_dianpu.id
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source_types = list(
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ShangpinLeixingDianpu.query.filter(dianpu_id=src_id).order_by('paixu', 'id')
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)
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type_payloads = []
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for st in source_types:
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type_payloads.append({
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'source': st,
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'tupian_url': _copy_image_url(st.tupian_url, tgt_id, 'shangpinleixing'),
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})
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source_zones = list(
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ShangpinZhuanqu.query.filter(dianpu_id=src_id).order_by('paixu', 'id')
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)
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zone_payloads = []
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for sz in source_zones:
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zone_payloads.append({'source': sz})
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source_products = list(
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Shangpin.query.filter(dianpu_id=src_id).order_by('paixu', 'id')
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)
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product_payloads = []
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for sp in source_products:
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product_payloads.append({
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'source': sp,
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'tupian_url': _copy_image_url(sp.tupian_url, tgt_id, 'shangpin'),
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'guize_tupian': _copy_image_url(sp.guize_tupian, tgt_id, 'shangpinguize') if sp.guize_tupian else None,
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})
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return type_payloads, zone_payloads, product_payloads
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def _insert_copied_catalog(target_dianpu, type_payloads, zone_payloads, product_payloads):
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"""在目标店铺插入复制后的类型、专区、商品，维护 ID 映射"""
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type_id_map = {}
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zone_id_map = {}
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for item in type_payloads:
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st = item['source']
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new_type = ShangpinLeixingDianpu.query.create(
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dianpu_id=target_dianpu.id,
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gonggong_leixing_id=st.gonggong_leixing_id,
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jieshao=st.jieshao,
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tupian_url=item['tupian_url'],
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paixu=st.paixu,
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shangjia_zhuangtai=st.shangjia_zhuangtai,
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fengjin_zhuangtai=st.fengjin_zhuangtai,
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shenhe_zhuangtai=st.shenhe_zhuangtai,
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)
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type_id_map[st.id] = new_type.id
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for item in zone_payloads:
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sz = item['source']
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new_dianpu_leixing_id = type_id_map.get(sz.dianpu_leixing_id)
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if not new_dianpu_leixing_id:
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raise ShopCopyError(f'专区「{sz.mingzi}」关联的商品类型在复制映射中缺失')
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new_zone = ShangpinZhuanqu.query.create(
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dianpu_id=target_dianpu.id,
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mingzi=sz.mingzi,
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dianpu_leixing_id=new_dianpu_leixing_id,
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leixing_id=sz.leixing_id,
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paixu=sz.paixu,
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shangjia_zhuangtai=sz.shangjia_zhuangtai,
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fengjin_zhuangtai=sz.fengjin_zhuangtai,
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shenhezhuangtai=sz.shenhezhuangtai,
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)
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zone_id_map[sz.id] = new_zone.id
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copied_products = 0
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for item in product_payloads:
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sp = item['source']
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new_dianpu_leixing_id = type_id_map.get(sp.dianpu_leixing_id)
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new_zhuanqu_id = zone_id_map.get(sp.zhuanqu_id) if sp.zhuanqu_id else None
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if sp.dianpu_leixing_id and not new_dianpu_leixing_id:
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raise ShopCopyError(f'商品「{sp.biaoqian}」关联的商品类型在复制映射中缺失')
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if sp.zhuanqu_id and not new_zhuanqu_id:
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raise ShopCopyError(f'商品「{sp.biaoqian}」关联的专区在复制映射中缺失')
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Shangpin.query.create(
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biaoqian=sp.biaoqian,
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jiage=sp.jiage,
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kucun=sp.kucun,
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leixing_id=sp.leixing_id,
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zhuanqu_id=new_zhuanqu_id,
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zhenshi_xiaoliang=0,
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duiwai_xiaoliang=0,
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jieshao=sp.jieshao,
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xiadan_xuzhi=sp.xiadan_xuzhi,
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guize_tupian=item['guize_tupian'],
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yaoqiuleixing=sp.yaoqiuleixing,
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huiyuan_id=sp.huiyuan_id,
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yongjin=sp.yongjin,
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kaioi_ewai_dashou_fencheng=sp.kaioi_ewai_dashou_fencheng,
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ewai_dashou_fencheng=sp.ewai_dashou_fencheng,
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tupian_url=item['tupian_url'],
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paixu=sp.paixu,
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shenhezhuangtai=sp.shenhezhuangtai,
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dianpu_id=target_dianpu.id,
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dianpu_leixing_id=new_dianpu_leixing_id,
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shangjia_zhuangtai=sp.shangjia_zhuangtai,
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fengjin_zhuangtai=sp.fengjin_zhuangtai,
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shenhe_zhuangtai=sp.shenhe_zhuangtai,
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)
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copied_products += 1
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return {
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'types': len(type_payloads),
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'zones': len(zone_payloads),
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'products': copied_products,
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}
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def copy_shop_catalog(source_user_uid, target_user_uid, copy_mode=COPY_MODE_APPEND):
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"""
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复制店铺商品目录。
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:param source_user_uid: 源店铺小程序用户 ID（YonghuPingzheng.yonghu，唯一）
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:param target_user_uid: 目标店铺小程序用户 ID
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:param copy_mode: 'replace' 全部覆盖 | 'append' 补充追加
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"""
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if copy_mode not in (COPY_MODE_REPLACE, COPY_MODE_APPEND):
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raise ShopCopyError('copy_mode 无效，仅支持 replace 或 append')
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source_dianpu = resolve_dianpu_by_user_uid(source_user_uid)
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target_dianpu = resolve_dianpu_by_user_uid(target_user_uid)
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if source_dianpu.id == target_dianpu.id:
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raise ShopCopyError('源店铺与目标店铺不能相同')
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# 1. 预复制 OSS 图片（DB 变更前完成，失败则目标店不受影响）
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type_payloads, zone_payloads, product_payloads = _pre_copy_source_images(
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source_dianpu, target_dianpu
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)
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oss_cleanup = []
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# 2. 数据库事务：锁定目标店 → 可选清空 → 写入
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with transaction.atomic():
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Dianpu.objects.select_for_update().get(id=target_dianpu.id)
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if copy_mode == COPY_MODE_REPLACE:
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oss_cleanup = _clear_target_catalog_db_only(target_dianpu)
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stats = _insert_copied_catalog(target_dianpu, type_payloads, zone_payloads, product_payloads)
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if oss_cleanup:
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_delete_oss_urls(oss_cleanup)
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logger.info(
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'店铺商品复制完成: source=%s(%s) -> target=%s(%s) mode=%s stats=%s',
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source_dianpu.id, source_user_uid,
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target_dianpu.id, target_user_uid,
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copy_mode, stats,
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)
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return {
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'source_dianpu_id': source_dianpu.id,
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'source_dianpu_name': source_dianpu.dianpu_mingcheng,
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'target_dianpu_id': target_dianpu.id,
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'target_dianpu_name': target_dianpu.dianpu_mingcheng,
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'copy_mode': copy_mode,
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'copied_types': stats['types'],
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'copied_zones': stats['zones'],
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'copied_products': stats['products'],
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}
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