Question

我有这个代码，它有多个where子句：

Time_Sheet_Details.findAll({
    include: [
        {
            model: timesheetNotesSubcon,
            required: false,
            attributes:["note","file_name", "id", "working_hrs", "timestamp", "has_screenshot", "notes_category"]
        },
        {
            model: Timesheet,
            attributes:["id","leads_id","userid"],
            where:  {leads_id: filters.leads_id}, // Client
            include:[
                {
                    model: Lead_Info, attributes:["id","fname","lname","email","hiring_coordinator_id","status"],
                    where:  {hiring_coordinator_id: {$in: filters.sc_id}}, // SC
                    include:[{
                        model: adminInfoSchema,
                        required: false,
                        attributes:["admin_id","admin_fname", "admin_lname", "admin_email", "signature_contact_nos", "signature_company"],      
                    }]

                },
                {
                    model:Personal_Info,attributes:["userid","fname","lname","email"],
                    where: {userid: filters.subcon_id}, // Subcon
                }
            ]
        }],
    where: { 
        reference_date: filters.reference_date
    },
    order:[
        ["id","DESC"]
    ],
    offset:((page-1)*limit),
    limit : limit,
    subQuery:false

}).then(function(foundObject){
    willFulfillDeferred.resolve(foundObject);
});

where子句是具有注释Client，SC和Subcon的子句。但是，如果where子句是可选的，那么最好的方法是什么？我用它来搜索过滤器。因此，如果filters.leads_id为null，则where: {leads_id: filters.leads_id}, // Client不应包含在查询中。与其他人一样。我能想到的唯一解决方案是为非空参数的每个场景重复这些代码块，但重复但不实用。

任何其他方法或解决方案？

Answer 1

如果我理解正确，我认为作为第一步，您应该定义您的各自的where子句，有条件地设置或不设置每个特定的搜索条件：

const clientWhere = filters.leads_id ? {leads_id: filters.leads_id} : {}
const scWhere = filters.sc_id ? {hiring_coordinator_id: {$in: filters.sc_id}} : {}
const subconWhere = filters.subcon_id ? {userid: filters.subcon_id} : {}

所以此时如果没有设置搜索选项，那么只有一个空对象作为where子句。

接下来，在查询中使用那些预定义的where子句对象：

Time_Sheet_Details.findAll({
    include: [
        {
            model: timesheetNotesSubcon,
            required: false,
            attributes:["note","file_name", "id", "working_hrs", "timestamp", "has_screenshot", "notes_category"]
        },
        {
            model: Timesheet,
            attributes:["id","leads_id","userid"],
            where: clientWhere, // Client
            include:[
                {
                    model: Lead_Info, attributes:["id","fname","lname","email","hiring_coordinator_id","status"],
                    where: scWhere, // SC
                    include:[{
                        model: adminInfoSchema,
                        required: false,
                        attributes:["admin_id","admin_fname", "admin_lname", "admin_email", "signature_contact_nos", "signature_company"],      
                    }]

                },
                {
                    model:Personal_Info,attributes:["userid","fname","lname","email"],
                    where: subconWhere, // Subcon
                }
            ]
        }],
    where: { 
        reference_date: filters.reference_date
    },
    order:[
        ["id","DESC"]
    ],
    offset:((page-1)*limit),
    limit : limit,
    subQuery:false

}).then(function(foundObject){
    willFulfillDeferred.resolve(foundObject);
});

Sequelize条件包含where子句nodejs

1 个答案: