复杂的猫鼬过滤器查询

Question

我正在构建一个允许用户使用侧边栏过滤结果的站点。他们选择的条件越多，他们的搜索结果就越具体（见附图）。

用户可以选择与他们要查找的内容相匹配的过滤器（复选框）。为此，我正在使用 MongoDB。我的架构如下：

brandName: {
    type: String,
    required: false
  },
productType: {
    type: String,
    required: false
  },
  skincareConcern: {
    type: Array,
    required: false
  },
  ingredients: {
    type: Array,
    required: false
  },
  skinType: {
    type: Array,
    required: false
  }

现在，我正在使用.find()带有$or查询的 a 但这不正确，即因为$or返回任何这些条件的所有匹配项。我需要结果来过滤/缩小我包含的更多标准。

在下面查看我当前的代码：

Products.find({
    $or: [
      { brandName : { $in : brands, $exists: true, $ne: [] } },
      { skincareConcern : { $in : skincareConcerns, $exists: true, $ne: [] } },
      { productType : { $in : productTypes, $exists: true, $ne: [] } },
      { ingredients : { $in : ingredients, $exists: true, $ne: [] } },
      { skinTypes : { $in : skinTypes, $exists: true, $ne: [] } }
    ]
  }

示例有效载荷：

{"brands":["ACWELL","BOTANIC FARM"],"skincareConcerns":[],"productTypes":["essence","moisturizer"],"ingredients":[],"skinType":[]}

Answer 1

您可以创建一个查询变量来保留将用于过滤的字段。

样本：

var query = {};
var payload = {"brands":["ACWELL","BOTANIC FARM"],"skincareConcerns":[],"productTypes":["essence","moisturizer"],"ingredients":[],"skinType":[]};
if (payload.brands && payload.brands.length > 0) query.brandName = {$in : payload.brands};
if (payload.skincareConcerns && payload.skincareConcerns.length > 0) query.skincareConcern = {$in : payload.skincareConcerns};
if (payload.productTypes && payload.productTypes.length > 0) query.productType = {$in : payload.productTypes};
if (payload.ingredients && payload.ingredients.length > 0) query.ingredients = {$in : payload.ingredients};
if (payload.skinTypes && payload.skinTypes.length > 0) query.skinTypes = {$in : payload.skinTypes};
var result = await Products.find(query);

Answer 2

let aggrQuery = [
    {
        '$match': {
            $and: [
                brandName ? { 'brandName ': { $in: brands } } : {},
                skincareConcern ? { 'skincareConcern ': { $in: skincareConcerns } } : {},
                productType ? { 'productType ': { $in: productTypes } } : {},
                ingredients ? { 'ingredients ': { $in: ingredients } } : {},
                skinTypes ? { 'skinTypes ': { $in: skinTypes } } : {}
            ]
        }
    }
]
Products.aggregate(aggrQuery).exec((err, result) => {

})