[英]$gte & $lte is not working as expected in Mongoose/MongoDB
我正在按价格范围过滤产品列表。 有些价格范围很好,有些则不行。 当我单击(单选框)前端的价格范围时,它会通过价目表在后端进行处理。 看起来 $gte 和 $lte 没有按预期工作。 我错过了什么吗?
反应前端----价格表:
export const prices = [
{
_id:0,
name: 'Any',
array: []
},
{
_id:1,
name: '$50 to $99',
array: [50, 99]
},
{
_id:2,
name: '$100 to $199',
array: [100, 199]
},
{
_id:3,
name: '$200 to $299',
array: [200, 299]
},
{
_id:4,
name: '$300 to $399',
array: [300, 399]
},
{
_id:5,
name: '$400 to $599',
array: [400, 599]
},
{
_id:6,
name: '$600 to $799',
array: [600, 799]
},
]
NodeJS后端--------产品搜索列表:
exports.listBySearch = (req, res) => {
let order = req.body.order ? req.body.order : "desc";
let sortBy = req.body.sortBy ? req.body.sortBy : "_id";
let limit = req.body.limit ? parseInt(req.body.limit) : 100;
let skip = parseInt(req.body.skip);
let findArgs = {};
// console.log(order, sortBy, limit, skip, req.body.filters);
// console.log("findArgs", findArgs);
for (let key in req.body.filters) {
if (req.body.filters[key].length > 0) {
if (key === "price") {
// gte - greater than price [0-10]
// lte - less than
findArgs[key] = {
$gte: req.body.filters[key][0],
$lt: req.body.filters[key][1]
};
console.log(findArgs)
// console.log -- { price: { '$gte': 50, '$lt': 99.99 } }
} else {
findArgs[key] = req.body.filters[key];
}
}
}
Product.find(findArgs)
.select("-images")
.populate("category")
.sort([[sortBy, order]])
.skip(skip)
.limit(limit)
.exec((err, data) => {
if (err) {
return res.status(400).json({
error: "Products not found"
});
}
res.json({
size: data.length,
data
});
});
};
Mongoose --------- 数据库:
{
"_id" : ObjectId("6079a8d675db7021c00aa973"),
"sold" : 5,
"name" : "Java Book for Everyone",
"description" : "Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book.",
"price" : "75",
"category" : ObjectId("605c9c94dcf90b34e8ec33e0"),
"shipping" : false,
"quantity" : 7,
"createdAt" : ISODate("2021-04-16T15:10:14.626Z"),
"updatedAt" : ISODate("2021-04-16T15:10:14.626Z"),
"__v" : 0
}
mongoDB 文档中的价格是string
类型。 这就是为什么查询不起作用。 您想将 mongo 中的 price 值转换为 number 以进行比较。 修改查询以发送如下内容:
{ $expr: { $and: [ $gte: [{ $toDouble: "$price" }, req.body.filters[key][0]], $lt: [{ $toDouble: "$price" }, req.body.filters[key][1]] ] } }
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