db.items.mapReduce({function(){emit(this.name,this.price);},function(key,value){Array.sum(value)},{out:"map_reduce_example"}});
items are:
{
"_id":"5bfe309ff0e3775c684e85c9",
"name":"sdgjkld",
"price":"123"
}
Error Description:
2018-11-28T12:16:19.407+0530 E QUERY [thread1] SyntaxError: invalid property id #(shell):1:98
Try this
db.items.mapReduce(
function () {
emit(this.name, this.price);
},
function (key, value) {
Array.sum(value)
},
{ out: "map_reduce_example" }
)
OR
var first = function () {
emit(this.name, this.price);
}
var second = function (key, value) {
Array.sum(value)
}
db.items.mapReduce(
first,
second,
{ out: "map_reduce_example" }
)
Related
I have issue with querying MongoDB (Mongoose) by passing the function as parameter in Model.find() -> like this Model.find(searchCondition). I hope that you can help me.
// Fetching patients from the database
exports.getPatients = (req, res, next) => {
const criterionSearchCategory = req.query.kriterijumPretrage;
const ageSearchCategory = req.query.kriterijumGodina;
const searchInputValue = req.query.pojamPretrage;
console.log({ [criterionSearchCategory]: { [ageSearchCategory]: Number([searchInputValue]) }});
// Patient search condition, based on selected option from select dropdown
function searchCondition() {
if (criterionSearchCategory == 'undefined') {
return {};
} else if (criterionSearchCategory == 'age') {
return { [criterionSearchCategory]: { [ageSearchCategory] : Number([searchInputValue]) }}
} else {
return { [criterionSearchCategory]: { $in: [ "/^" + searchInputValue + "/i" ]}}
}
}
...
const patientQuery = Patient.find(searchCondition);
getPatients(patientsPerPage: number, currentPage: number, criterionSearchCategory: string, searchInputValue: string, ageSearchCategory: any) {
const queryParams = `?pacijenataPoStranici=${patientsPerPage}&trenutnaStranica=${currentPage}&kriterijumPretrage=${criterionSearchCategory}&pojamPretrage=${searchInputValue}&kriterijumGodina=${ageSearchCategory}`;
this.http
.get<{ message: string, patients: any, maxPatients: number }>( BACKEND_URL + queryParams)
// Execute map on every data that makes it through Observable stream
.pipe(map((patientData) => {
I want to menton when I pass the query params manually, for example const patientQuery = Patient.find({ age: { '$gt': 30 } }); appropriate patients will be fetched correctly , but when I pass the function , like this const patientQuery = Patient.find(searchCondition); then does not work.
The first question, is it possible to pass the function as parameter like this?
Any suggestion will be appreciate. Thank you
How to test the following Class that has validation in construction using set.
const BaseParameter = class BaseParameter {
constructor(addr, fullname, value) {
this.addr = addr;
this.fullname = fullname;
this.value = value;
}
get value() {
return this._value;
}
set value(value) {
if (typeof value !== "number") {
throw new TypeError(`Parameter ${this.fullname} should be a number`);
}
this._value = value;
}
};
I have tried this following method of Jest.
test("BaseParameter with invalid constructor", () => {
expect(new BaseParameter("test", "test fullname", "a")).toThrowError(
TypeError
);
});
but throws the error and the pass fails.
The docs have clear example, I just has stuck
test("BaseParameter with invalid constructor", () => {
expect(() => new BaseParameter("test", "test fullname", "a")).toThrowError(
TypeError
);
});
https://jestjs.io/docs/en/es6-class-mocks
This is my first class where I defined all db functions.
import React,{Component} from 'react';
var Datastore = require('react-native-local-mongodb')
, db = new Datastore({ filename: 'asyncStorageKey', autoload: true });
export default class RDDBManager {
static dbmanager = null;
static getInstance() {
if (RDDBManager.dbmanager == null) {
RDDBManager.dbmanager = new RDDBManager();
}
return this.dbmanager;
}
constructor () {
}
//insert items
insertItem(item){
var json = item.toJsonString();
console.log("Inside insertItem ::: "+json);
db.insert(json,function(err,newDos){
return newDos;
});
}
//read single item
readItem(itemId){
db.findOne({ id: itemId }, function (err, doc) {
return doc;
});
}
//read all items
readAllItems(){
db.find({}, function (err, docs) {
return docs;
});
}
getModalData(modalName) {
this.readAllItems();
}
//update
updateItem(itemId){
db.update({ id: itemId }, { $set: { system: 'solar system' } }, { multi: true }, function (err, numReplaced) {
});
}
//delete item
deleteItem(itemId){
db.remove({ id: itemId }, {}, function (err, numRemoved) {
return numRemoved;
});
}
}
But,when I try to call these functions from another class,the data is undefined.
loadDataFromDB() {
var items = RDDBManager.getInstance().readAllItems();
console.log("Items ======>>>>>> "+items);
}
the value of items is undefined.
This is because you are not doing things right, Your readallitems is async in nature so you have to do something like this:-
//read all items
readAllItems(callback){
db.find({}, function (err, docs) {
callback(docs);
});
}
And For calling something like this:-
loadDataFromDB() {
RDDBManager.getInstance().readAllItems(function(items){
console.log("Items ======>>>>>> "+items);
});
}
Alternatively, you can use promise or Async await also.
I've got a Mongoose schema for an object called Plot which works fine when it comes to saving. However, when I try to update those plots with the code below, it fails, returning null:
exports.updatePlot = async (req, res) => {
let updates = { ...req.body.props };
const id = updates._id;
if (updates.plannedYield) {
const plannedYield = Number(updates.plannedYield);
const metrics = {
yield: { day120CustomerEstimation: plannedYield }
};
updates.metrics = metrics;
delete updates.plannedYield;
}
console.log(updates);
try {
console.log('updating plot');
const updatedPlot = await Plot.findByIdAndUpdate(id, updates, {
new: true
});
if (!updatedPlot) {
console.log("couldn't update plot");
}
console.log(('updated plot saved:', updatedPlot));
res.json({
updatedPlot
});
} catch (e) {
console.log('error', e);
return res.status(422).send({
error: { message: 'e', resend: true }
});
}
};
This results in the following console output:
{ id: '5aa65801c97d496ef457b802',
metrics: { yield: { day120CustomerEstimation: 1 } } }
updating plot
couldn't update plot
null
Can anyone suggest a fix? I've tried casting id to ObjectId, which didn't do the trick.
I'm still quite new to promises and the like and I need some help with this problem. One of my it blocks does not end before the next one begins ending up in a StaleElementReferenceError a whole specfile later from where the code was supposed to be called.
listView.js (I know it looks weird but I set it up this way for an unrelated reason):
module.exports = function () {
var public = {};
public.checkFilters = function (filters) {
var promises = [];
for (var i = 0; i < filters.length; i++) {
promises[i] = getFilterPromise(filters[i]);
}
return protractor.promise.all(promises);
};
var getFilterPromise = function (filter) {
return public.getHeaderIndex(filter.on).then(function (headerIndex) {
return checkRows(filter.values, headerIndex);
});
};
public.getHeaderIndex = function (text) {
var headers = table.all(by.tagName('th'));
var correctHeaderIndex;
return headers.each(function (header, index) {
header.getText().then(function (actualHeaderText) {
if (actualHeaderText === text) {
correctHeaderIndex = index;
}
})
}).then(function () {
return new Promise(function (resolve, reject) {
if (correctHeaderIndex) {
resolve(correctHeaderIndex);
} else {
reject('Header not found');
}
});
});
};
public.getWorkflowCount = function () {
return workflows.count();
};
var checkRows = function (matchers, headerIndex) {
var mismatch = false;
return workflows.each(function (element, index) {
public.getTextFromCell(index, headerIndex).then(function (actual) {
if (!anyMatch(actual, matchers)) {
mismatch = true;
}
});
}).then(function () {
return new Promise(function (resolve, reject) {
if (mismatch) {
reject('Header not found');
} else {
resolve('all rows matched');
}
});
});
};
var anyMatch = function (actual, matchers) {
var match = false;
for (var j = 0; j < values.length; j++) {
if (text === values[j]) {
match = true;
}
}
return match;
};
public.getTextFromCell = function (row, column) {
return workflows.get(row).all(by.tagName('td')).get(column).getText();
};
return public;
}();
LV_00:
describe('LV_00:', function () {
it('statusfilter', function () {
P.listView.filter('status', H.regStatus.S.inProgress);
});
it('statusfilter works', function () {
P.listView.checkFilters([{
on: H.lang.S.status,
values: [H.regStatus.S.inProgress]
}]);
});
});
I think you should move the test preparation code into the beforeEach():
describe('LV_00:', function () {
beforeEach('statusfilter', function () {
P.listView.filter('status', H.regStatus.S.inProgress);
});
it('statusfilter works', function () {
P.listView.checkFilters([{
on: H.lang.S.status,
values: [H.regStatus.S.inProgress]
}]);
});
});
You may also need to use the done callback function:
describe('LV_00:', function (done) {
beforeEach('statusfilter', function () {
P.listView.filter('status', H.regStatus.S.inProgress).then(function () {
done();
});
});
it('statusfilter works', function () {
P.listView.checkFilters([{
on: H.lang.S.status,
values: [H.regStatus.S.inProgress]
}]);
});
});
assuming filter() returns a promise.
Found the solution thanks to alecxe proposing to use done() I used the following after some googling around.
it('statusfilter', function () {
P.listView.filter('status', H.regStatus.S.inProgress);
});
it('statusfilter works', function () {
protractor.promise.controlFlow().execute(function () {
return P.listView.checkFilters([{
on: H.lang.S.status,
values: [H.regStatus.S.inProgress]
}]);
});
});
Found here: Prevent Protractor from finishing before promise has been resolved