Postgresql 通过两个嵌套关联对顺序进行续集
我尝试对两个子查询使用Postgresql 通过两个嵌套关联对顺序进行续集,postgresql,sql-order-by,sequelize.js,Postgresql,Sql Order By,Sequelize.js,我尝试对两个子查询使用顺序。但是sequelize会生成一个错误的查询,并在主查询中使用此order by。 我的问题是: Model.findAll({ order: sequelize.literal('("asset->forOrder"."value" - "asset.currenthours") desc), offset: 0, limit: 10, include: [{ model: Asset, as: 'asset', include: [{ mo
顺序
。但是sequelize会生成一个错误的查询,并在主查询中使用此order by
。我的问题是:
Model.findAll({
order: sequelize.literal('("asset->forOrder"."value" - "asset.currenthours") desc),
offset: 0,
limit: 10,
include: [{
model: Asset,
as: 'asset',
include: [{
model: ThresholdService,
required: false,
as: 'thresholdservices'
}, {
model: ThresholdService,
where: {property: 'hours'},
required: false,
duplicating: false,
as: 'forOrder'
}],
}]
})
我希望得到这样的查询:
SELECT ..., "asset->forOrder"."asset_id", "asset->forOrder"."value"
FROM (
SELECT ...
FROM "machineidentity" AS "machineidentity"
LIMIT 10 OFFSET 0
) AS "machineidentity"
LEFT OUTER JOIN "asset" AS "asset" ON "machineidentity"."unique_id" = "asset"."machineIdentityId"
LEFT OUTER JOIN "thresholdservice" AS "asset->thresholdservices" ON "asset"."id" = "asset->thresholdservices"."asset_id"
LEFT OUTER JOIN "thresholdservice" AS "asset->forOrder" ON "asset"."id" = "asset->forOrder"."asset_id" AND "asset->forOrder"."property" = 'hours'
ORDER BY ("asset->forOrder"."value" - "asset"."currenthours") DESC;
但是:
SELECT ..., "asset->forOrder"."asset_id", "asset->forOrder"."value"
FROM (
SELECT ...
FROM "machineidentity" AS "machineidentity"
ORDER BY ("asset->forOrder"."value" - "asset"."currenthours") DESC
LIMIT 10 OFFSET 0
) AS "machineidentity"
LEFT OUTER JOIN "asset" AS "asset" ON "machineidentity"."unique_id" = "asset"."machineIdentityId"
LEFT OUTER JOIN "thresholdservice" AS "asset->thresholdservices" ON "asset"."id" = "asset->thresholdservices"."asset_id"
LEFT OUTER JOIN "thresholdservice" AS "asset->forOrder" ON "asset"."id" = "asset->forOrder"."asset_id" AND "asset->forOrder"."property" = 'hours'
ORDER BY ("asset->forOrder"."value" - "asset"."currenthours") DESC;
ORDER BY
出现在machineidentity
查询中。我在sequelize
中找到了这样的代码:
if (
subQuery
&& Array.isArray(order)
&& order[0]
&& !(order[0] instanceof Association)
&& !(typeof order[0] === 'function' && order[0].prototype instanceof Model)
&& !(typeof order[0].model === 'function' && order[0].model.prototype instanceof Model)
&& !(typeof order[0] === 'string' && model && model.associations !== undefined && model.associations[order[0]])
) {
subQueryOrder.push(this.quote(order, model, '->'));
}
mainQueryOrder.push(this.quote(order, model, '->'));
我刚刚创建了订单
,但如果,则无法满足此。
因此,现在我的订单如下所示:
[['asset.forOrder', 'value', sequelize.literal('-(machine.asset.currentkilometers - machine.asset.initialvalueinkm)')]]