如何在 sequelize 中进行多个查询？

Question

我正在尝试对过滤器端点进行多个查询。 假设端点是router.get('/filter', caseController.getCasesByFilteredRecord);

我希望用户能够在前端进行多个查询。 基于 Sequelize 文档，我想出了下面的代码。 但是当我测试它时，它使用 AND 来绑定所有查询，而不是显示所选查询的结果。 请参阅下面我的代码：

根据@MOLDA 建议修改

exports.getCasesByFilteredRecord = async (req, res) => {
    try {
        var where = [];
        // iterate over the params
        for (let q in req.query) {
            var obj = {};
            obj[q] = { [Op.eq]: req.query[q] };
            // if q is discoveryMethod then the obj is { discoveryMethod: { [Op.eq]: req.query.discoveryMethod } }
            where.push(obj);
        }
        const filteredResult = await Case.findAll({
            attributes: { exclude: ['id', 'countryId', 'caseFullname', 'casePhone', 'createdAt', 'caseCommunityName', 'deletedAt'] },
            where: {
              [Op.or]: [
            {
             discoveryMethod: {
                [Op.eq]: req.query.discoveryMethod
                  }
            },
            {
            caseAge: {
                [Op.eq]: req.query.caseAge
                  }
            },
            {
            caseGender: {
                [Op.eq]: req.query.caseGender
                  }
            },
            {
            caseComorbidity: {
                [Op.eq]: req.query.caseComorbidity
                  }
            },
            {
            testResult: {
                [Op.eq]: req.query.testResult
                  }
            },
            {
            priority: {
                [Op.eq]: req.query.priority
                  }
                },
            {
            caseStatus: {
                [Op.eq]: req.query.caseStatus
                        }
            },
            {
            requireBedAdmission: {
                [Op.eq]: req.query.requireBedAdmidsion
                        }
            },
            {
            requireICUBed: {
                [Op.eq]: req.query.requireICUBed
                        }
            },
            {
            requireVentilator: {
              [Op.eq]: req.query.requireVentilator
                        }
            }  
                  ]
              },
            order: [
                ['createdAt', 'DESC']
            ],
            limit: 10
        });
        if (filteredResult.length === 0) {
            return res.json({
                message: 'There are no case records for this query. Please unselect some items.'
            })
        };
        res.status(200);
        res.json({
            message: 'Case query records retrieved.',
            data: filteredResult
        });
    } catch (err) {
        console.log(err);
        res.status(500)
            .json({
                message: "There is an error retrieving case query records!",
                err
            });
    };
};

假设我的查询类似于http://localhost:8004/api/v1/cases/filter?caseComorbidity=HBP&testResult=positive&caseGender=Male

Sequelise 将 Select 来自 Case 其中这些查询是输入的值，并为其他人加入所有 null 值。 但我只希望它到 select 我在查询中输入值并省略 null 查询。

Answer 1

您应该根据收到的查询参数构建where 。

exports.getCasesByFilteredRecord = async (req, res) => {
    try {
        var where = [];
        // iterate over the params
        for (let q in req.query) {
            var obj = {};
            obj[q] = { [Op.eq]: req.query[q] };
            // if q is discoveryMethod then the obj is { discoveryMethod: { [Op.eq]: req.query.discoveryMethod } }
            where.push(obj);
        }
        const filteredResult = await Case.findAll({
            attributes: { exclude: ['id', 'countryId', 'caseFullname', 'casePhone', 'createdAt', 'caseCommunityName', 'deletedAt'] },
            where: {
                [Op.or]: where // assign the "where" array here
            },
            order: [
                ['createdAt', 'DESC']
            ],
            limit: 10
        });
        if (filteredResult.length === 0) {
            return res.json({
                message: 'There are no case records for this query. Please unselect some items.'
            })
        };
        res.status(200);
        res.json({
            message: 'Case query records retrieved.',
            data: filteredResults
        });
    } catch (err) {
        console.log(err);
        res.status(500)
            .json({
                message: "There is an error retrieving case query records!",
                err
            });
    };
};

我没有测试它，所以期待一些错误；）

编辑

exports.getCasesByFilteredRecord = async (req, res) => {
    try {
        const filteredResult = await Case.findAll({
            attributes: { exclude: ['id', 'countryId', 'caseFullname', 'casePhone', 'createdAt', 'caseCommunityName', 'deletedAt'] },
            where: req.query, // <-- req.query -> { discoveryMethod: 'blabla' } -> some.url?discoveryMethod=blabla
            order: [
                ['createdAt', 'DESC']
            ],
            limit: 10
        });
        if (filteredResult.length === 0) {
            return res.json({
                message: 'There are no case records for this query. Please unselect some items.'
            })
        };
        res.status(200);
        res.json({
            message: 'Case query records retrieved.',
            data: filteredResults
        });
    } catch (err) {
        console.log(err);
        res.status(500)
            .json({
                message: "There is an error retrieving case query records!",
                err
            });
    };
};