{
  "summary": [
    {
      "name": "pbl_class",
      "comment": "班级（花名册内联 roster_json）",
      "module": "pbl_domain_ext",
      "engine": "mariadb",
      "charset": "utf8mb4",
      "tenant_scoped": true
    }
  ],
  "fields": [
    {
      "name": "tenant_id",
      "comment": "租户ID(强制打头)",
      "null": false,
      "type": "str",
      "length": 32
    },
    {
      "name": "id",
      "comment": "主键",
      "null": false,
      "type": "int",
      "length": 20,
      "unsigned": true,
      "auto_increment": true
    },
    {
      "name": "class_uid",
      "comment": "班级UID",
      "null": false,
      "type": "str",
      "length": 32
    },
    {
      "name": "name",
      "comment": "名称",
      "null": false,
      "type": "str",
      "length": 128
    },
    {
      "name": "grade",
      "comment": "年级",
      "null": false,
      "type": "str",
      "length": 64
    },
    {
      "name": "teacher_id",
      "comment": "教师",
      "null": false,
      "type": "str",
      "length": 32
    },
    {
      "name": "student_count",
      "comment": "学生数",
      "null": false,
      "type": "int"
    },
    {
      "name": "roster_json",
      "comment": "花名册",
      "null": true,
      "type": "json"
    },
    {
      "name": "status",
      "comment": "状态",
      "null": false,
      "type": "str",
      "length": 64
    },
    {
      "name": "created_at",
      "comment": "创建时间",
      "null": false,
      "type": "datetime"
    },
    {
      "name": "updated_at",
      "comment": "更新时间",
      "null": false,
      "type": "datetime"
    }
  ],
  "indexes": [
    {
      "name": "uk_cls_uid",
      "unique": true,
      "fields": [
        "tenant_id",
        "class_uid"
      ]
    },
    {
      "name": "PRIMARY",
      "unique": true,
      "fields": [
        "id"
      ]
    }
  ],
  "codes": []
}