diff --git a/inventory-backend/migrations/versions/a1b2c3d4e5f6_add_purchase_stockbuy_link.py b/inventory-backend/migrations/versions/a1b2c3d4e5f6_add_purchase_stockbuy_link.py
deleted file mode 100644
index 78258ae..0000000
--- a/inventory-backend/migrations/versions/a1b2c3d4e5f6_add_purchase_stockbuy_link.py
+++ /dev/null
@@ -1,79 +0,0 @@
-"""打通采购申请与采购入库的按单入库链路
-
-Revision ID: a1b2c3d4e5f6
-Revises: None (或填当前最新 revision)
-Create Date: 2026-07-14
-
-变更内容:
-  1. purchase_request 表新增 base_id (FK → material_base.id)
-  2. stock_buy 表新增 request_id (FK → purchase_request.id)
-"""
-from alembic import op
-import sqlalchemy as sa
-
-
-# revision identifiers, used by Alembic.
-revision = 'a1b2c3d4e5f6'
-down_revision = None   # ← 替换为当前最新 revision ID
-branch_labels = None
-depends_on = None
-
-
-def upgrade():
-    # ============================================================
-    # 1. purchase_request 新增 base_id
-    # ============================================================
-    with op.batch_alter_table('purchase_request', schema=None) as batch_op:
-        batch_op.add_column(
-            sa.Column('base_id', sa.Integer(), nullable=True,
-                      comment='关联基础物料ID')
-        )
-        batch_op.create_foreign_key(
-            'fk_purchase_request_base_id',
-            'material_base',
-            ['base_id'],
-            ['id'],
-            ondelete='SET NULL'
-        )
-        batch_op.create_index(
-            'ix_purchase_request_base_id',
-            ['base_id']
-        )
-
-    # ============================================================
-    # 2. stock_buy 新增 request_id
-    # ============================================================
-    with op.batch_alter_table('stock_buy', schema=None) as batch_op:
-        batch_op.add_column(
-            sa.Column('request_id', sa.Integer(), nullable=True,
-                      comment='关联采购申请单ID')
-        )
-        batch_op.create_foreign_key(
-            'fk_stock_buy_request_id',
-            'purchase_request',
-            ['request_id'],
-            ['id'],
-            ondelete='SET NULL'
-        )
-        batch_op.create_index(
-            'ix_stock_buy_request_id',
-            ['request_id']
-        )
-
-
-def downgrade():
-    # ============================================================
-    # 回滚：stock_buy 删除 request_id
-    # ============================================================
-    with op.batch_alter_table('stock_buy', schema=None) as batch_op:
-        batch_op.drop_constraint('fk_stock_buy_request_id', type_='foreignkey')
-        batch_op.drop_index('ix_stock_buy_request_id')
-        batch_op.drop_column('request_id')
-
-    # ============================================================
-    # 回滚：purchase_request 删除 base_id
-    # ============================================================
-    with op.batch_alter_table('purchase_request', schema=None) as batch_op:
-        batch_op.drop_constraint('fk_purchase_request_base_id', type_='foreignkey')
-        batch_op.drop_index('ix_purchase_request_base_id')
-        batch_op.drop_column('base_id')
diff --git a/inventory-backend/migrations_add_purchase_stockbuy_link.sql b/inventory-backend/migrations_add_purchase_stockbuy_link.sql
deleted file mode 100644
index 6d73c5f..0000000
--- a/inventory-backend/migrations_add_purchase_stockbuy_link.sql
+++ /dev/null
@@ -1,93 +0,0 @@
--- ============================================================
--- migrations_add_purchase_stockbuy_link.sql
--- 打通「采购申请」与「采购入库」的按单入库链路
---
--- 变更内容:
---   1. purchase_request 表新增 base_id 列（FK → material_base.id）
---   2. stock_buy 表新增 request_id 列（FK → purchase_request.id）
---
--- 执行方式（任选一种）:
---   psql -h <host> -U postgres -d inventory_system -f migrations_add_purchase_stockbuy_link.sql
---   或在 pgAdmin / Navicat / DBeaver 中打开执行
--- ============================================================
-
-BEGIN;
-
--- ============================================================
--- 1. purchase_request 新增 base_id
---    硬关联基础物料表，使采购申请能精确锁定物料
--- ============================================================
-ALTER TABLE purchase_request
-    ADD COLUMN IF NOT EXISTS base_id INTEGER;
-
--- 添加外键约束（如果列已存在但无约束，会补充）
-DO $$
-BEGIN
-    IF NOT EXISTS (
-        SELECT 1 FROM information_schema.table_constraints
-        WHERE constraint_name = 'fk_purchase_request_base_id'
-          AND table_name = 'purchase_request'
-    ) THEN
-        ALTER TABLE purchase_request
-            ADD CONSTRAINT fk_purchase_request_base_id
-            FOREIGN KEY (base_id) REFERENCES material_base(id)
-            ON DELETE SET NULL;
-    END IF;
-END;
-$$;
-
--- 为 base_id 添加索引（支持按物料筛选采购申请）
-CREATE INDEX IF NOT EXISTS ix_purchase_request_base_id
-    ON purchase_request (base_id);
-
-COMMENT ON COLUMN purchase_request.base_id IS '关联基础物料ID';
-
-
--- ============================================================
--- 2. stock_buy 新增 request_id
---    关联采购申请单，使入库记录可追溯到来源采购单
--- ============================================================
-ALTER TABLE stock_buy
-    ADD COLUMN IF NOT EXISTS request_id INTEGER;
-
--- 添加外键约束
-DO $$
-BEGIN
-    IF NOT EXISTS (
-        SELECT 1 FROM information_schema.table_constraints
-        WHERE constraint_name = 'fk_stock_buy_request_id'
-          AND table_name = 'stock_buy'
-    ) THEN
-        ALTER TABLE stock_buy
-            ADD CONSTRAINT fk_stock_buy_request_id
-            FOREIGN KEY (request_id) REFERENCES purchase_request(id)
-            ON DELETE SET NULL;
-    END IF;
-END;
-$$;
-
--- 为 request_id 添加索引（支持"按单查入库"的追溯查询）
-CREATE INDEX IF NOT EXISTS ix_stock_buy_request_id
-    ON stock_buy (request_id);
-
-COMMENT ON COLUMN stock_buy.request_id IS '关联采购申请单ID';
-
-
--- ============================================================
--- 3. 验证结果
--- ============================================================
-SELECT
-    column_name,
-    data_type,
-    is_nullable,
-    pg_catalog.col_description(
-        (SELECT c.oid FROM pg_catalog.pg_class c
-         WHERE c.relname = table_name),
-        ordinal_position
-    ) AS comment
-FROM information_schema.columns
-WHERE table_name IN ('purchase_request', 'stock_buy')
-  AND column_name IN ('base_id', 'request_id')
-ORDER BY table_name, column_name;
-
-COMMIT;