从 mongoose 的子数组中找到匹配多个对象的记录
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【中文标题】从 mongoose 的子数组中找到匹配多个对象的记录【英文标题】：find the record with the matching multiple objects from sub array in mongoose 【发布时间】：2022-01-23 18:59:20 【问题描述】：数据库中存储的数据： 如何获取匹配多个子数组对象的记录sub_question
"_id": "61c1c0efc204bb170e280d2f",
"title": "Searching Relevant Cases",
"question": "Your Industry",
"vendor_id": "61b8324040fb21d80f3e6702",
"answer_type": "is_radio",
"optional_answer": false,
"sub_question_type": "none",
"answers": [
"is_rating": false,
"is_specific_date": false,
"_id": "61c1c0efc204bb170e280d30",
"answer": "Bank"
,
"is_rating": false,
"is_specific_date": false,
"_id": "61c1c0efc204bb170e280d31",
"answer": "Tech"
,
"is_rating": false,
"is_specific_date": false,
"_id": "61c1c0efc204bb170e280d32",
"answer": "Other"
],
"view": "list_view",
"is_active": true,
"is_delete": false,
"sub_question": [],
"draggable_list": [],
"__v": 0
,
"_id": "61c1c142c204bb170e280d45",
"title": "Searching Relevant Cases",
"question": "Employee size",
"vendor_id": "61b8324040fb21d80f3e6702",
"answer_type": "is_radio",
"optional_answer": false,
"sub_question_type": "none",
"answers": [
"is_rating": false,
"is_specific_date": false,
"_id": "61c1c142c204bb170e280d46",
"answer": "SMB (<100)"
,
"is_rating": false,
"is_specific_date": false,
"_id": "61c1c142c204bb170e280d47",
"answer": "Mid (100 - 1000)"
,
"is_rating": false,
"is_specific_date": false,
"_id": "61c1c142c204bb170e280d48",
"answer": "Enterprise (> 1000)"
],
"view": "list_view",
"is_active": true,
"is_delete": false,
"sub_question": [],
"draggable_list": [],
"__v": 0
,
"_id": "61c1c24ac204bb170e280d5e",
"title": "Dependent",
"question": "On previous Chosen option",
"vendor_id": "61b8324040fb21d80f3e6702",
"answer_type": "is_radio",
"optional_answer": false,
"sub_question_type": "has_parent",
"sub_question": [
"question_id": "61c1c0efc204bb170e280d2f",
"_id": "61c1c24ac204bb170e280d5f",
"answer": "Bank"
,
"question_id": "61c1c142c204bb170e280d45",
"_id": "61c1c24ac204bb170e280d60",
"answer": "SMB (<100)"
],
"answers": [
"is_rating": false,
"is_specific_date": false,
"_id": "61c1c24ac204bb170e280d61",
"answer": "answer 1"
,
"is_rating": false,
"is_specific_date": false,
"_id": "61c1c24ac204bb170e280d62",
"answer": "answer2"
,
"is_rating": false,
"is_specific_date": false,
"_id": "61c1c24ac204bb170e280d63",
"answer": "answer3"
],
"view": "list_view",
"is_active": true,
"is_delete": false,
"draggable_list": [],
"__v": 0
,
"_id": "61c1c2d7c204bb170e280d7e",
"title": "Dependent 1",
"question": "On previous Chosen option 1",
"vendor_id": "61b8324040fb21d80f3e6702",
"answer_type": "is_radio",
"optional_answer": false,
"sub_question_type": "has_parent",
"sub_question": [
"question_id": "61c1c142c204bb170e280d45",
"_id": "61c1c2d7c204bb170e280d7f",
"answer": "Mid (100 - 1000)"
,
"question_id": "61c1c0efc204bb170e280d2f",
"_id": "61c1c2d7c204bb170e280d80",
"answer": "Tech"
],
"answers": [
"is_rating": false,
"is_specific_date": false,
"_id": "61c1c2d7c204bb170e280d81",
"answer": "answer 11"
,
"is_rating": false,
"is_specific_date": false,
"_id": "61c1c2d7c204bb170e280d82",
"answer": "answer 22"
,
"is_rating": false,
"is_specific_date": false,
"_id": "61c1c2d7c204bb170e280d83",
"answer": "answer 33"
],
"view": "list_view",
"is_active": true,
"is_delete": false,
"draggable_list": [],
"__v": 0
根据 question_id 和 answer 查询以找到所需的结果：
"obj":
"question_id": "61c1c0efc204bb170e280d2f",
"answer": "Bank"
,
"obj1":
"question_id": "61c1c142c204bb170e280d45",
"answer": "SMB (<100)"
想要达到的结果：
"_id": "61c1c24ac204bb170e280d5e",
"title": "Dependent",
"question": "On previous Chosen option",
"vendor_id": "61b8324040fb21d80f3e6702",
"answer_type": "is_radio",
"optional_answer": false,
"sub_question_type": "has_parent",
"sub_question": [
"question_id": "61c1c0efc204bb170e280d2f",
"_id": "61c1c24ac204bb170e280d5f",
"answer": "Bank"
,
"question_id": "61c1c142c204bb170e280d45",
"_id": "61c1c24ac204bb170e280d60",
"answer": "SMB (<100)"
],
"answers": [
"is_rating": false,
"is_specific_date": false,
"_id": "61c1c24ac204bb170e280d61",
"answer": "answer 1"
,
"is_rating": false,
"is_specific_date": false,
"_id": "61c1c24ac204bb170e280d62",
"answer": "answer2"
,
"is_rating": false,
"is_specific_date": false,
"_id": "61c1c24ac204bb170e280d63",
"answer": "answer3"
],
"view": "list_view",
"is_active": true,
"is_delete": false,
"draggable_list": [],
"__v": 0
【问题讨论】：
【参考方案1】：$objectToArray 将 userInput 转换为 k-v 元组数组以便于处理
$map 检查question_id 是否为$in sub_question 数组
$match$allElementsTrue
db.collection.aggregate([
"$addFields":
"userInput":
"obj":
"question_id": "61c1c0efc204bb170e280d2f",
"answer": "Bank"
,
"obj1":
"question_id": "61c1c142c204bb170e280d45",
"answer": "SMB (<100)"
,
"$addFields":
"userInput":
"$objectToArray": "$userInput"
,
"$addFields":
"userInput":
"$map":
"input": "$userInput.v",
"as": "q",
"in":
$and: [
"$in": [
"$$q.question_id",
"$sub_question.question_id"
]
,
"$in": [
"$$q.answer",
"$sub_question.answer"
]
]
,
"$match":
$expr:
$eq: [
true,
"$allElementsTrue": [
"$userInput"
]
]
])
这里是Mongo playground 供您参考。
【讨论】：
它返回两个对象。在我的情况下，我只想要一个同时匹配 obj 和 obj1 的对象。 @MunamRamay 很抱歉这个错误。更新了答案以匹配question_id 和 answer以上是关于从 mongoose 的子数组中找到匹配多个对象的记录的主要内容，如果未能解决你的问题，请参考以下文章