js 续集多个 where in include 不起作用答案

【问题标题】：js sequelize multiple where in include not workingjs 续集多个 where in include 不起作用
【发布时间】：2017-04-28 23:44:39
【问题描述】：

我有一个包含模型中有多个 where 条件的 sequelize 查询：

const scrapingUrl = await db.ScrapingUrl.findOne({
            where: strong text{
                date_downloaded: null,
            },
            include: [ {
                model: db.Action,
                where: {
                    $or: {
                        hourly_scraping_limit: null,
                        scraping_counter: {
                            $or: {
                                $eq: null,
                                $lt: Sequelize.literal('Action.hourly_scraping_limit')
                            }
                        }
                    },
                    $or: {
                        hourly_scraping_limit_per_proxy: null,
                        scraping_counter_per_proxy: {
                            $or: {
                                $eq: null,
                                $lt: Sequelize.literal('Action.hourly_scraping_limit_per_proxy')
                            }
                        }
                    }
                },
                include: [ db.ScrapingContainer ]
            } ]
        });

它似乎忽略了 hourly_scraping_limit 部分，只过滤了 hourly_scraping_limit_per_proxy。相关的查询部分是这样的：

$or: {
    hourly_scraping_limit: null,
    scraping_counter: {
        $or: {
            $eq: null,
            $lt: Sequelize.literal('Action.hourly_scraping_limit')
        }
    }
},

Sequelize 记录以下 SQL 语句：

SELECT `ScrapingUrl`.`id`, `ScrapingUrl`.`action_id`, `ScrapingUrl`.`url`, `ScrapingUrl`.`date_added`, `ScrapingUrl`.`date_downloaded`, `ScrapingUrl`.`date_scraped`, `ScrapingUrl`.`success_pattern_found`, `ScrapingUrl`.`blocked_pattern_found`, `ScrapingUrl`.`scraping_blob_id`, `Action`.`id` AS `Action.id`, `Action`.`name` AS `Action.name`, `Action`.`scraping_container_id` AS `Action.scraping_container_id`, `Action`.`hourly_scraping_limit` AS `Action.hourly_scraping_limit`, `Action`.`hourly_scraping_limit_per_proxy` AS `Action.hourly_scraping_limit_per_proxy`, `Action`.`scraping_counter` AS `Action.scraping_counter`, `Action`.`scraping_counter_per_proxy` AS `Action.scraping_counter_per_proxy`, `Action`.`scraping_counter_last_reset` AS `Action.scraping_counter_last_reset`, `Action`.`scraping_success_pattern` AS `Action.scraping_success_pattern`, `Action`.`scraping_blocked_pattern` AS `Action.scraping_blocked_pattern`, `Action.ScrapingContainer`.`id` AS `Action.ScrapingContainer.id`, `Action.ScrapingContainer`.`name` AS `Action.ScrapingContainer.name` FROM `scraping_urls` AS `ScrapingUrl` INNER JOIN `actions` AS `Action` ON `ScrapingUrl`.`action_id` = `Action`.`id` AND ((`Action`.`hourly_scraping_limit_per_proxy` IS NULL OR (`Action`.`scraping_counter_per_proxy` IS NULL OR `Action`.`scraping_counter_per_proxy` < Action.hourly_scraping_limit_per_proxy))) LEFT OUTER JOIN `scraping_containers` AS `Action.ScrapingContainer` ON `Action`.`scraping_container_id` = `Action.ScrapingContainer`.`id` WHERE `ScrapingUrl`.`date_downloaded` IS NULL LIMIT 1;

【问题讨论】：

标签： javascript sequelize.js

【解决方案1】：

$or 格式不正确。我认为这就是问题所在。示例：

where: {
  '$or': [
    {bla: true},
    {bla: false}
  ]
}

翻译为：

WHERE bla = true OR bla = false

如果需要嵌套$or：

where: {
  '$or': [
    {'$or': [{foo: true, bar: false}, {foo: false, bar: true}]},
    {'$or': [{bla: true, ble: false}, {bla: false, ble: true}]},
  ]
}

翻译为：

WHERE ((foo = true AND bar = false) OR (foo = false AND bar = true)) OR ((foo = false AND bar = true) OR (foo = true AND bar = false))

【讨论】：