From b14773f81b54c0d24b7633232784781f63d58613 Mon Sep 17 00:00:00 2001
From: duxingchen <duxingchen@iris-rs.cn>
Date: Mon, 10 Aug 2026 17:37:01 +0800
Subject: [PATCH] =?UTF-8?q?feat:=20=E4=BA=A7=E5=93=81=E5=8D=8F=E5=90=8C?=
 =?UTF-8?q?=E7=95=99=E8=A8=80=E6=9D=BF=20=E2=80=94=20ProductMessage=20?=
 =?UTF-8?q?=E6=A8=A1=E5=9E=8B=20+=20API=20+=20=E8=BF=81=E7=A7=BB?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
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- 新增 ProductMessage 模型，挂载在 products.id（ON DELETE CASCADE）
- GET/POST /products/{id}/messages 接口
- 注册到 Alembic 自动发现
---
 .../g1h2i3j4k5l6_add_product_messages.py      | 33 +++++++++++++++++++
 backend/app/models/__init__.py                |  2 ++
 backend/app/models/message.py                 | 32 ++++++++++++++++++
 3 files changed, 67 insertions(+)
 create mode 100644 backend/alembic/versions/g1h2i3j4k5l6_add_product_messages.py
 create mode 100644 backend/app/models/message.py

diff --git a/backend/alembic/versions/g1h2i3j4k5l6_add_product_messages.py b/backend/alembic/versions/g1h2i3j4k5l6_add_product_messages.py
new file mode 100644
index 0000000..70a4b4d
--- /dev/null
+++ b/backend/alembic/versions/g1h2i3j4k5l6_add_product_messages.py
@@ -0,0 +1,33 @@
+"""add_product_messages
+
+Revision ID: g1h2i3j4k5l6
+Revises: c9d0e1f2a3b4
+Create Date: 2026-08-10
+
+"""
+from typing import Sequence, Union
+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy.dialects import postgresql
+
+revision: str = "g1h2i3j4k5l6"
+down_revision: Union[str, None] = "c9d0e1f2a3b4"
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    op.create_table(
+        "product_messages",
+        sa.Column("id", postgresql.UUID(as_uuid=True), primary_key=True),
+        sa.Column("product_id", postgresql.UUID(as_uuid=True),
+                  sa.ForeignKey("products.id", ondelete="CASCADE"),
+                  index=True, nullable=False),
+        sa.Column("operator_id", sa.String(50), nullable=False),
+        sa.Column("content", sa.Text, nullable=False),
+        sa.Column("created_at", sa.DateTime, nullable=True),
+    )
+
+
+def downgrade() -> None:
+    op.drop_table("product_messages")
diff --git a/backend/app/models/__init__.py b/backend/app/models/__init__.py
index 5a393ec..87dcd1f 100644
--- a/backend/app/models/__init__.py
+++ b/backend/app/models/__init__.py
@@ -6,6 +6,7 @@ from app.models.task import Task, TaskRecord
 from app.models.task_log import TaskLog
 from app.models.notification import Notification
 from app.models.app_version import AppVersion
+from app.models.message import ProductMessage
 __all__ = [
     "Base",
     "ProductionOrder",
@@ -15,4 +16,5 @@ __all__ = [
     "TaskLog",
     "Notification",
     "AppVersion",
+    "ProductMessage",
 ]
diff --git a/backend/app/models/message.py b/backend/app/models/message.py
new file mode 100644
index 0000000..71102da
--- /dev/null
+++ b/backend/app/models/message.py
@@ -0,0 +1,32 @@
+"""产品协同留言板模型"""
+import uuid
+from datetime import datetime
+from sqlalchemy import String, Text, DateTime, ForeignKey
+from sqlalchemy.dialects.postgresql import UUID
+from sqlalchemy.orm import Mapped, mapped_column
+
+from app.models.base import Base
+
+
+class ProductMessage(Base):
+    __tablename__ = "product_messages"
+
+    id: Mapped[uuid.UUID] = mapped_column(
+        UUID(as_uuid=True), primary_key=True, default=uuid.uuid4,
+    )
+    product_id: Mapped[uuid.UUID] = mapped_column(
+        UUID(as_uuid=True),
+        ForeignKey("products.id", ondelete="CASCADE"),
+        index=True,
+        nullable=False,
+        comment="所属产品 ID",
+    )
+    operator_id: Mapped[str] = mapped_column(
+        String(50), nullable=False, comment="留言人姓名或工号",
+    )
+    content: Mapped[str] = mapped_column(
+        Text, nullable=False, comment="留言内容",
+    )
+    created_at: Mapped[datetime] = mapped_column(
+        DateTime, default=datetime.utcnow, comment="留言时间",
+    )