Javascript 仅在满足条件时填充
我有一个mongodb数据库,我使用mongoose和nodejs 我需要从填充“tabela_tuss”的下一个查询返回数据,前提是我有字段“temtussvinculado=true” 以下是我正在做的:Javascript 仅在满足条件时填充,javascript,node.js,mongoose,mongoose-populate,Javascript,Node.js,Mongoose,Mongoose Populate,我有一个mongodb数据库,我使用mongoose和nodejs 我需要从填充“tabela_tuss”的下一个查询返回数据,前提是我有字段“temtussvinculado=true” 以下是我正在做的: ConvProced.find({'convenioId':new ObjectId(req.params.id)}) .populate('convenioId') .populate({ path:'procedId',
ConvProced.find({'convenioId':new ObjectId(req.params.id)})
.populate('convenioId')
.populate({
path:'procedId',
populate:{
path:'tabela_tuss',
match: { 'procedId.temtussvinculado': true}
}
})
.exec( (err,data) => {
callback(err,data,res)
})
我的问题是,我与“procedId.temtussvinculado:true”的匹配没有效果,而且“tabela_tuss”从未填充过
我做错了什么
以下是我的模式:
////
var conveniosSchema = new mongoose.Schema({
nome: {type: String, unique:true},
ativo: {type: Boolean}
});
module.exports = mongoose.model('Convenio', conveniosSchema,'convenios' );
////
////
const agProcedimentosSchema = new mongoose.Schema({
ativo:{type:Boolean},
temtussvinculado:{type:Boolean},
tabela_tuss:{type:mongoose.Schema.Types.ObjectId, ref:'Tuss_22'}
});
module.exports = mongoose.model('Ag_procedimento', agProcedimentosSchema,'ag_procedimentos' );
///
////
const tuss_22Schema = new mongoose.Schema({
codigo: {type: String, unique:true},
descricao:{type: String},
tabela:{type: String}
});
module.exports = mongoose.model('Tuss_22', tuss_22Schema,'tuss_22' );
////
//../models/convenioprocedimento
var conveniosProcedsSchema = new mongoose.Schema({
convenioId:{type:mongoose.Schema.Types.ObjectId, ref:'Convenio'},
procedId:{type:mongoose.Schema.Types.ObjectId, ref:'Ag_procedimento'},
valor_particular:{type:Number},
valor_convenio:{type:Number},
});
module.exports = mongoose.model('ConvenioProcedimento', conveniosProcedsSchema,'conveniosprocedimentos' );
//my query:
const ConvProced = require('../models/convenioprocedimento');
ConvProced.find({'convenioId':new ObjectId(req.params.id)})
.populate('convenioId')
.populate({
path:'procedId',
populate:{
path:'tabela_tuss',
match: { 'procedId.temtussvinculado': true}
}
})
.exec( (err,data) => {
callback(err,data,res)
})
实际上,您在这里要求的是“仅在数据中的条件允许的情况下进行填充”,这实际上不是“直接”支持的操作或“嵌套填充”语法的使用 因此,如果您想对项目实际填充或不填充施加“条件”,那么必须“手动”处理填充调用 在您的案例中,基本前提是您需要检查需要从“初始”顶级调用中获取的值,但当给定条件实际允许时,“仅”调用“内部”填充 因此,您的代码应该是这样的:使用“承诺”,使用基本上是“循环”的地方或每个查询结果,并测试
proceedid.temtussvinglado
,查看它是否为true/false
,其中true
我们实际上发出了一个调用,否则只返回当前状态的数据:
ConvProced.find({'convenioId':new ObjectId(req.params.id)})
.populate('convenioId procedId')
.exec()
.then(data =>
Promise.all(
data.map( d =>
( d.proceedid.temtussvinculado )
? mongoose.model('Tuss_22').populate(d,{ path: 'proceedId.tabela_tuss' })
: d
)
)
)
)
// Populated conditionally
.then( data =>
// Do something with data
)
.catch(err => console.error(err)); // or something else with error
除了“承诺”之外,还有其他不同的选项,但它是无依赖性选项。其他情况下,例如做几乎相同的事情,但如果您还没有,则是一个附加依赖项:
ConvProced.find({'convenioId':new ObjectId(req.params.id)})
.populate('convenioId procedId')
.exec((err,data) => {
if (err) throw err;
async.map(data,(d,callback) =>
( d.proceedid.temtussvinculado )
? mongoose.model('Tuss_22').populate(d,{ path: 'proceedId.tabela_tuss' },callback)
: callback(null,d)
(err,data) => {
if (err) throw err; // or something
// Conditionally populated
}
)
})
还通过一个完整的工作示例进行了演示,该示例实际上比您需要执行的操作要复杂一些,因为在本示例中,“条件”嵌套在另一个数组中:
const async = require('async'),
mongoose = require('mongoose'),
Schema = mongoose.Schema;
mongoose.Promise = global.Promise;
mongoose.set('debug',true);
mongoose.connect('mongodb://localhost/test');
const subInnerSchema = new Schema({
label: String
});
const innerSchema = new Schema({
name: String,
populate: Boolean,
subs: [{ type: Schema.Types.ObjectId, ref: 'Sub' }]
});
const outerSchema = new Schema({
title: String,
inners: [{ type: Schema.Types.ObjectId, ref: 'Inner' }]
});
const Sub = mongoose.model('Sub', subInnerSchema);
const Inner = mongoose.model('Inner', innerSchema);
const Outer = mongoose.model('Outer', outerSchema);
function log(data) {
console.log(JSON.stringify(data, undefined, 2))
}
async.series(
[
// Clean data
(callback) =>
async.each(mongoose.models,(model,callback) =>
model.remove({},callback),callback),
// Insert some data
(callback) =>
async.waterfall(
[
(callback) =>
Sub.create([1,2,3,4].map( label => ({ label })),callback),
(subs,callback) =>
Inner.create(
[0,2].map(x => subs.slice(x,x+2))
.map((el,i) => ({
name: i+i,
populate: i == 1,
subs: el
})),
callback
),
(inners,callback) =>
Outer.create(
inners.map((inner,i) => ({
title: i+1,
inners: [inner]
})),
callback
),
],
callback
),
// Conditional populate async.map version
(callback) =>
Outer.find().populate('inners').exec((err,outers) => {
if (err) callback(err);
async.map(
outers,
(outer,callback) =>
async.map(
outer.inners,
(inner,callback) =>
(inner.populate)
? Inner.populate(inner,{ path: 'subs' },callback)
: callback(null,inner),
(err,inners) => {
if (err) callback(err);
outer.inners = inners
callback(null,outer);
}
),
(err,outers) => {
if (err) callback(err);
log(outers);
callback();
}
);
}),
// Conditional populate Promise
(callback) =>
Outer.find().populate('inners').exec()
.then(outers =>
Promise.all(
outers.map( outer =>
new Promise((resolve,reject) => {
Promise.all(
outer.inners.map( inner =>
(inner.populate)
? Inner.populate(inner,{ path: 'subs' })
: inner
)
).then(inners => {
outer.inners = inners;
resolve(outer)
})
.catch(reject)
})
)
)
)
.then(outers => {
log(outers);
callback();
})
.catch(err => callback(err))
],
(err) => {
if (err) throw err;
mongoose.disconnect();
}
);
这会产生显示“有条件”选择的输出,当然可以使用以下任一方法:
Mongoose: subs.remove({}, {})
Mongoose: inners.remove({}, {})
Mongoose: outers.remove({}, {})
Mongoose: subs.insert({ label: '1', _id: ObjectId("5961830256bf9e2d0fcf13b3"), __v: 0 })
Mongoose: subs.insert({ label: '2', _id: ObjectId("5961830256bf9e2d0fcf13b4"), __v: 0 })
Mongoose: subs.insert({ label: '3', _id: ObjectId("5961830256bf9e2d0fcf13b5"), __v: 0 })
Mongoose: subs.insert({ label: '4', _id: ObjectId("5961830256bf9e2d0fcf13b6"), __v: 0 })
Mongoose: inners.insert({ name: '0', populate: false, _id: ObjectId("5961830256bf9e2d0fcf13b7"), subs: [ ObjectId("5961830256bf9e2d0fcf13b3"), ObjectId("5961830256bf9e2d0fcf13b4") ], __v: 0 })
Mongoose: inners.insert({ name: '2', populate: true, _id: ObjectId("5961830256bf9e2d0fcf13b8"), subs: [ ObjectId("5961830256bf9e2d0fcf13b5"), ObjectId("5961830256bf9e2d0fcf13b6") ], __v: 0 })
Mongoose: outers.insert({ title: '1', _id: ObjectId("5961830256bf9e2d0fcf13b9"), inners: [ ObjectId("5961830256bf9e2d0fcf13b7") ], __v: 0 })
Mongoose: outers.insert({ title: '2', _id: ObjectId("5961830256bf9e2d0fcf13ba"), inners: [ ObjectId("5961830256bf9e2d0fcf13b8") ], __v: 0 })
Mongoose: outers.find({}, { fields: {} })
Mongoose: inners.find({ _id: { '$in': [ ObjectId("5961830256bf9e2d0fcf13b7"), ObjectId("5961830256bf9e2d0fcf13b8") ] } }, { fields: {} })
Mongoose: subs.find({ _id: { '$in': [ ObjectId("5961830256bf9e2d0fcf13b5"), ObjectId("5961830256bf9e2d0fcf13b6") ] } }, { fields: {} })
[
{
"_id": "5961830256bf9e2d0fcf13b9",
"title": "1",
"__v": 0,
"inners": [
{
"_id": "5961830256bf9e2d0fcf13b7",
"name": "0",
"populate": false,
"__v": 0,
"subs": [
"5961830256bf9e2d0fcf13b3",
"5961830256bf9e2d0fcf13b4"
]
}
]
},
{
"_id": "5961830256bf9e2d0fcf13ba",
"title": "2",
"__v": 0,
"inners": [
{
"_id": "5961830256bf9e2d0fcf13b8",
"name": "2",
"populate": true,
"__v": 0,
"subs": [
{
"_id": "5961830256bf9e2d0fcf13b5",
"label": "3",
"__v": 0
},
{
"_id": "5961830256bf9e2d0fcf13b6",
"label": "4",
"__v": 0
}
]
}
]
}
]
Mongoose: outers.find({}, { fields: {} })
Mongoose: inners.find({ _id: { '$in': [ ObjectId("5961830256bf9e2d0fcf13b7"), ObjectId("5961830256bf9e2d0fcf13b8") ] } }, { fields: {} })
Mongoose: subs.find({ _id: { '$in': [ ObjectId("5961830256bf9e2d0fcf13b5"), ObjectId("5961830256bf9e2d0fcf13b6") ] } }, { fields: {} })
[
{
"_id": "5961830256bf9e2d0fcf13b9",
"title": "1",
"__v": 0,
"inners": [
{
"_id": "5961830256bf9e2d0fcf13b7",
"name": "0",
"populate": false,
"__v": 0,
"subs": [
"5961830256bf9e2d0fcf13b3",
"5961830256bf9e2d0fcf13b4"
]
}
]
},
{
"_id": "5961830256bf9e2d0fcf13ba",
"title": "2",
"__v": 0,
"inners": [
{
"_id": "5961830256bf9e2d0fcf13b8",
"name": "2",
"populate": true,
"__v": 0,
"subs": [
{
"_id": "5961830256bf9e2d0fcf13b5",
"label": "3",
"__v": 0
},
{
"_id": "5961830256bf9e2d0fcf13b6",
"label": "4",
"__v": 0
}
]
}
]
}
]
因此,您可以在那里看到,以几乎相同的方式,有一个“布尔”字段正在进行测试,以确定是执行
.populate()
还是只返回普通数据。在模拟“任何”联接之前,匹配参数到.populate()
实际上是针对集合进行处理的,实际上,它是如何工作的。因此,这应该是.populate({path:'procedId',match:{'temtussvinculado':true},populate:{path:'tabela_tuss'}})
谢谢你,Neil Lunn先生。它解决了我的问题problem@Neil伦,对不起,我弄错了。问题还在继续。必须始终填充路径“procedd”。如果我听你的建议的话,temtussvinculadotrue的时候它没有被填充。只有当temtussvinculado=true时,我才需要填充“tabela_tuss”