{
    "summary": [
        {
            "name": "wechat_user_binding",
            "title": "微信用户绑定(openid→系统用户)",
            "primary": ["id"],
            "catelog": "entity"
        }
    ],
    "fields": [
        {"name": "id", "title": "主键ID", "type": "str", "length": 32, "nullable": "no"},
        {"name": "openid", "title": "微信OpenID", "type": "str", "length": 100, "nullable": "no"},
        {"name": "user_id", "title": "系统用户ID", "type": "str", "length": 32, "nullable": "no"},
        {"name": "org_id", "title": "机构ID", "type": "str", "length": 32, "nullable": "no"},
        {"name": "created_at", "title": "创建时间", "type": "timestamp", "nullable": "no"}
    ],
    "indexes": [
        {"name": "idx_wub_openid", "idxtype": "unique", "idxfields": ["openid"]},
        {"name": "idx_wub_user", "idxtype": "normal", "idxfields": ["user_id"]}
    ]
}