{
    "summary": [
        {
            "name": "contract",
            "title": "合同表",
            "primary": "id"
        }
    ],
    "fields": [
        {
            "name": "id",
            "title": "合同ID",
            "type": "str",
            "length": 32,
            "nullable": "no",
            "comments": "合同ID，主键"
        },
        {
            "name": "contract_number",
            "title": "合同编号", 
            "type": "str",
            "length": 50,
            "nullable": "no",
            "comments": "合同编号，唯一标识"
        },
        {
            "name": "title",
            "title": "合同标题",
            "type": "str",
            "length": 200,
            "nullable": "no",
            "comments": "合同标题"
        },
        {
            "name": "party_a",
            "title": "甲方",
            "type": "str",
            "length": 100,
            "nullable": "no",
            "comments": "甲方（我方）"
        },
        {
            "name": "party_b",
            "title": "乙方",
            "type": "str",
            "length": 100,
            "nullable": "no",
            "comments": "乙方（对方）"
        },
        {
            "name": "contract_type",
            "title": "合同类型",
            "type": "str",
            "length": 32,
            "nullable": "no",
            "comments": "合同类型，引用appcodes表的id"
        },
        {
            "name": "status",
            "title": "合同状态",
            "type": "str",
            "length": 20,
            "nullable": "no",
            "default": "draft",
            "comments": "合同状态：draft-草稿, active-生效, expired-过期, terminated-终止"
        },
        {
            "name": "amount",
            "title": "合同金额",
            "type": "decimal",
            "length": 15,
            "dec": 2,
            "nullable": "yes",
            "comments": "合同金额"
        },
        {
            "name": "start_date",
            "title": "开始日期",
            "type": "date",
            "nullable": "no",
            "comments": "合同开始日期"
        },
        {
            "name": "end_date",
            "title": "结束日期",
            "type": "date",
            "nullable": "no",
            "comments": "合同结束日期"
        },
        {
            "name": "sign_date",
            "title": "签署日期",
            "type": "date",
            "nullable": "yes",
            "comments": "签署日期"
        },
        {
            "name": "owner_id",
            "title": "负责人",
            "type": "str",
            "length": 32,
            "nullable": "no",
            "comments": "合同负责人，引用users表的id"
        },
        {
            "name": "org_id",
            "title": "所属组织",
            "type": "str",
            "length": 32,
            "nullable": "no",
            "comments": "所属组织，引用organization表的id"
        },
        {
            "name": "ai_compliance_result",
            "title": "合规检查结果",
            "type": "text",
            "nullable": "yes",
            "comments": "AI合规检查结果"
        },
        {
            "name": "ai_key_dates",
            "title": "关键时点",
            "type": "text",
            "nullable": "yes",
            "comments": "AI提取的关键时点JSON数据"
        },
        {
            "name": "created_at",
            "title": "创建时间",
            "type": "timestamp",
            "nullable": "no",
            "comments": "创建时间"
        },
        {
            "name": "updated_at",
            "title": "更新时间",
            "type": "timestamp",
            "nullable": "no",
            "comments": "更新时间"
        }
    ],
    "indexes": [
        {
            "name": "idx_contract_number",
            "idxtype": "unique",
            "idxfields": ["contract_number"]
        },
        {
            "name": "idx_contract_org",
            "idxtype": "index",
            "idxfields": ["org_id"]
        },
        {
            "name": "idx_contract_status",
            "idxtype": "index", 
            "idxfields": ["status"]
        }
    ],
    "codes": [
        {
            "field": "contract_type",
            "table": "appcodes",
            "valuefield": "id",
            "textfield": "name",
            "cond": "id='CONTRACT_TYPE'"
        },
        {
            "field": "owner_id",
            "table": "users",
            "valuefield": "id",
            "textfield": "username"
        }
    ]
}