feat(借库审批流): 完整前后端实现

inventory-backend/app/models/borrow.py

@@ -0,0 +1,96 @@
+from app.extensions import db, beijing_time
+from app.models.system import SysUser
+from datetime import datetime
+import json
+
+
+class BorrowApproval(db.Model):
+    """
+    借库审批单模型
+    用于管理借库申请的多级审批流程
+    """
+    __tablename__ = 'borrow_approval'
+
+    id = db.Column(db.Integer, primary_key=True)
+    # 审批单号
+    request_no = db.Column(db.String(100), unique=True, nullable=False, index=True)
+    # 申请人ID
+    applicant_id = db.Column(db.Integer, nullable=False, index=True)
+    # 申请说明
+    remark = db.Column(db.Text)
+    # 状态: 0-待审批, 1-已通过, 2-已驳回, 3-已完成(已借出)
+    status = db.Column(db.Integer, default=0, nullable=False)
+    # 允许审批的人员列表 (JSON格式)
+    allowed_approvers = db.Column(db.Text)
+    # 实际审批人ID
+    actual_approver_id = db.Column(db.Integer, index=True)
+    # 审批时间
+    approved_at = db.Column(db.DateTime)
+    # 驳回原因
+    reject_reason = db.Column(db.Text)
+    # 借库人姓名（申请时填写，审批通过后流转至 TransBorrow）
+    borrower_name = db.Column(db.String(100))
+
+    # 明细快照 (存储借库物品的名称、规格、库位、数量等信息)
+    items_json = db.Column(db.Text, nullable=False)
+
+    # 创建时间和更新时间
+    created_at = db.Column(db.DateTime, default=beijing_time, nullable=False)
+    updated_at = db.Column(db.DateTime, default=beijing_time, onupdate=beijing_time, nullable=False)
+
+    def _safe_parse_json(self, value):
+        if value is None:
+            return []
+        if isinstance(value, (list, dict)):
+            return value
+        if isinstance(value, str):
+            val = value.strip()
+            if not val:
+                return []
+            try:
+                parsed = json.loads(val)
+                return parsed if isinstance(parsed, list) else []
+            except (json.JSONDecodeError, TypeError, ValueError):
+                return []
+        return []
+
+    def get_items(self):
+        return self._safe_parse_json(self.items_json)
+
+    def set_items(self, items):
+        self.items_json = json.dumps(items, ensure_ascii=False) if items else '[]'
+
+    def get_allowed_approvers(self):
+        return self._safe_parse_json(self.allowed_approvers)
+
+    def set_allowed_approvers(self, approvers):
+        self.allowed_approvers = json.dumps(approvers, ensure_ascii=False) if approvers else '[]'
+
+    def to_dict(self):
+        return {
+            'id': self.id,
+            'request_no': self.request_no,
+            'applicant_id': self.applicant_id,
+            'applicant_name': self._get_user_name(self.applicant_id),
+            'remark': self.remark,
+            'status': self.status,
+            'status_text': ['待审批', '已通过', '已驳回', '已完成'][self.status] if self.status in [0, 1, 2, 3] else '未知',
+            'allowed_approvers': self.get_allowed_approvers(),
+            'actual_approver_id': self.actual_approver_id,
+            'approver_name': self._get_user_name(self.actual_approver_id) if self.actual_approver_id else None,
+            'approved_at': self.approved_at.strftime('%Y-%m-%d %H:%M:%S') if self.approved_at else None,
+            'reject_reason': self.reject_reason,
+            'borrower_name': self.borrower_name,
+            'items': self.get_items(),
+            'created_at': self.created_at.strftime('%Y-%m-%d %H:%M:%S') if self.created_at else None,
+            'updated_at': self.updated_at.strftime('%Y-%m-%d %H:%M:%S') if self.updated_at else None,
+        }
+
+    def _get_user_name(self, user_id):
+        if not user_id:
+            return ""
+        try:
+            user = SysUser.query.get(user_id)
+            return user.username if user else f"未知用户({user_id})"
+        except Exception:
+            return f"用户({user_id})"