Question

我有一个看起来像这样的搜索方法。（我还有很多其他代码用于进行不同类型的搜索，但为了简单起见我省略了这一点）

var mongoose = require('mongoose');

exports.searchWithParams = function (modal, req, res, next) {
    console.log(JSON.stringify(req.body));
    var body = req.body;
    var orConditions = [];
    var andConditions = [];
    for (var i = 0; i < body.searchParms.length; i++) {
        var param = body.searchParms[i];

        switch (modType) {
            case 'and':
                andConditions.push(param);
                break;
            case 'or':
                orConditions.push(param);
                break;
            default :
                throw new Error('Invalid mod type: ' + modType)
        }
    }
    var transalatedOrConditions = translateConditions(orConditions);
    var transalatedAndConditions = translateConditions(andConditions);

    var finalConditions = {};
    if (transalatedOrConditions.length > 0) {
        finalConditions['$or'] = transalatedOrConditions;
    }

    if (transalatedAndConditions.length > 0) {
        finalConditions['$and'] = transalatedAndConditions;
    }

    var query = modal.find(finalConditions);

    query.exec(function (err, results) {
        if (err) return next(err);
        if (!results) return res.json(401);
        res.json(results);
    });
}

function translateConditions(conditions) {
    var translatedConditions = [];
    for (var i = 0; i < conditions.length; i++) {
        var condition = conditions[i];
        var fieldName = condition.name;
        var fieldValue = condition.value;
        var searchType = condition.searchType;
        var dataType = condition.dataType;

        var translatedCondition = {};
        switch (searchType) {
            case 'range' :
                switch (dataType) {
                    case 'date':
                        if (!condition.minValue || !condition.maxValue) {
                            throw new Error('missing minValue and maxValue for range query')
                        }

                        translatedCondition[fieldName] = {$gt: new Date(condition.minValue), $lt: new Date(condition.maxValue)};
                        translatedConditions.push(translatedCondition);
                        break;

                    default :
                        throw new Error('Invalid datatype: ' + dataType)

                }
                break;
            default :
                throw new Error('Invalid search type: ' + searchType);
        }
    }

    return translatedConditions;
}

我给出了像这样的搜索参数

{
                "searchParms": [{
                    "name": "topics.modules.classes.startTime",
                    "minValue": "2014-12-31",
                    "maxValue": "2015-01-31",
                    "searchType": "range",
                    "dataType": "date",
                    "modType": "and"
                }
            ]
}

执行查询时，它生成的条件就像这样

{"$and":[{"topics.modules.classes.startTime":{"$gt":"2014-12-31T00:00:00.000Z","$lt":"2015-01-31T00:00:00.000Z"}}]}

如果我只是在mongo控制台中执行相同的查询，我会得到结果

    db.subjects.find({"$and":[{"topics.modules.classes.startTime":{"$gt":"2014-12-31T00:00:00.000Z","$lt":"2015-01-31T00:00:00.000Z"}}]});
{ "_id" : ObjectId("55538211864ff2daf3dfc504"), "name" : "math", "topics" : [ { "name" : "math topic", "startTime" : "", "endTime" : "", "fee" : "", "modules" : [ { "name" : "math module", "startTime" : "", "endTime" : "", "fee" : "", "classes" : [ { "name" : "math class", "startTime" : "2015-01-01T20:59:00.000Z", "endTime" : "2015-01-01T20:59:00.000Z", "fee" : 300 } ] } ] } ], "teacher" : ObjectId("5552de1756c7e627ebceb1af") }
{ "_id" : ObjectId("5553832d864ff2daf3dfc505"), "name" : "math1", "topics" : [ { "name" : "math1 topic", "startTime" : "", "endTime" : "", "fee" : "", "modules" : [ { "name" : "math1 module", "startTime" : "", "endTime" : "", "fee" : "", "classes" : [ { "name" : "math1 class", "startTime" : "2015-01-01T20:59:00.000Z", "endTime" : "2015-02-01T20:59:00.000Z", "fee" : 3001 } ] } ] } ], "teacher" : ObjectId("5552de1756c7e627ebceb1af") }

但不知怎的，这个方法什么都没有给我回报。其他类型的数据的范围查询，如数字（代码被省略）工作正常。如何在mongo控制台中使用相同的条件，而不是在服务器代码中。任何见解都会非常有用。

Mongoose数据范围查询无法正常工作

0 个答案: