Im using the find() method to get all data from a mongoDB like this
exports.getPersona = function (req, res){
Persona.find( function(err, persona) {
if (err)
res.send(err)
res.json(persona); // return all personas in json
}
);
}
Im trying to do a query like this:
exports.getPersona = function (req, res){
Persona.find(
{
faceDetection: {
name: "Borja"
}, function(err, persona) {
if (err)
res.send(err)
res.json(persona);
}
);
}
But i dont find nothing. My mongoose model is:
var faceDetectionSchema = mongoose.Schema({
faceDetection: {
name: String,
surname: String,
}
});
What could be the problem? Thanks a lot.
Edit: the document its a JSON like:
{
"faceDetection": {
"name": "Borja",
"surname": "Good"
}
Looks like your parentheses and braces are out of order. Try this below.
exports.getPersona = function(req, res) {
Persona.find({
'faceDetection.name': "Borja"
}, function(err, persona) {
if (err)
res.send(err)
res.json(persona);
})
}
Related
I am trying to build a CRUD API that query a mongodb. I want to add another attribute (temperature) to the query result before sending it back to the client. Particularly, I would like to do something where the arrow pointed in the code below.
app.get('/items/:name', function (req, res) {
console.log("get items by name");
Item.find({ name: req.params.name }, function (err, result) {
if (err) {
res.status(400).send(err.message);
} else {
res.status(200).send(result); // <<<<====== Here
}
});
});
How can I achieve this function? Thank you.
i think this below way to help you:
app.get('/items/:name', function (req, res) {
console.log("get items by name");
Item.find({ name: req.params.name }, function (err, result) {
result = {
temperature: yourTemperatureValue,
...result
} // <<<<====== Here
if (err) {
res.status(400).send(err.message);
} else {
res.status(200).send(result);
}
});
});
I've got the next data in the MongoDB:
{
...
name: Alex,
createdAt: {"$date":"2021-03-09T20:01:57.488Z"},
...
}
And I try to implement the range date query like this:
MongoClient.connect(url, (err, db) => {
if (err) {
return reject(err);
}
const dbo = db.db('dbname');
dbo.collection('users').find({
createdAt: {
$gte: new Date(dateFrom).toISOString(),
$lt: new Date(dateTo).toISOString()
}
}).toArray(
(err, res) => {
if (err) { return reject(err); }
db.close();
return resolve(res);
});
});
And always have zero-result without errors..
How coud I do the right query?
I am using MongoJS and would like to auto-create a new collection called "Comments" in my MongoDB via the code below...Not working and can't seem to figure out why. Thanks for any insight you can provide!
app.post("/post", function(req, res) {
db.comments.insert({
articleId: JSON.stringify(req.body._Id),
name: JSON.stringify(req.body.chatId),
message: JSON.stringify(req.body.message)
}),function(err, response) {
if(err) {
console.log(err);
} else {
console.log("This is working!");
}
}});
If you use the body-parse middleware:
app.post("/post", function(req, res) {
let { body } = req;
db.comments.insert({
articleId: body._Id,
name: body.chatId,
message: body.message
}),function(err, response) {
if(err) {
console.log(err);
} else {
console.log("This is working!");
}
}});
and if not , just use it like:
let parsed;
try {
parsed = JSON.parse(res.text)
} catch(err){req.send(err)}
// now you have:
parsed._Id ...
I have done this so many times before, but I can't seem to find the issue, it's probably something small and stupid. Take a look at the /server.js file here! (Shortened for demonstration purposes)
/* Make Mongoose promise based */
mongoose.Promise = Promise;
mongoose.connect('mongodb://localhost:27017', options);
const db = mongoose.connection;
db.on('error', console.error.bind(console, 'connection error: '));
/* Routes */
app.route('/games')
.post(postGame)
.get(getGames);
app.route('/games/:id')
.get(getGame)
.delete(deleteGame);
app.route("*").get((req, res) => {
res.sendFile('client/dist/index.html', { root: __dirname });
});
const port = 8080;
app.listen(port, () => {
console.log(`Connected! Server listening on port: ${port}`);
});
Then for my Game model, I have that in app/models/game.js.
import mongoose from 'mongoose';
const Schema = mongoose.Schema;
const gameSchema = new Schema(
{
name: {
type: String,
required:true
},
year: {
type: Number,
required:true
},
description: {
type: String,
required:true
},
picture: {
type: String,
required:true
},
postDate : { type: Date, default: Date.now }
}
);
export default mongoose.model('Game', gameSchema);
This is where I believe I am having the issue.
/* Import Game model schema */
import Game from '../models/game';
const getGames = (req, res) => {
Game.find({}, (err, games) => {
console.log(err, games)
if (err) {
res.send(err);
}
res.json(games);
});
}
const getGame = (req, res) => {
const { id } = req.params;
Game.findById(id, (err, game) => {
if (err) {
res.send(err);
}
res.json(game);
});
}
const postGame = (req, res) => {
let game = Object.assign(new Game(), req.body);
game.save(err => {
if (err) {
res.send(err);
}
res.json({ message: 'Game successfully created!' });
});
};
const deleteGame = (req, res) => {
Game.remove(
{ _id: req.params.id },
err => {
if (err) {
res.send(err);
}
res.json({ message: 'Game successfully deleted!' });
}
);
};
export {
getGames,
getGame,
postGame,
deleteGame
};
Just do be clear... I went into the mongo shell.
I did...
connecting to: test
> db.createCollection('Game')
> db.Game.insert({name: "SSB", year: 2001, description: "Fun Game", picture: "http://google.com", postDate: "2017-01-03T08:51:45.888Z"});
And when I type > db.Game.find({}); I am returned with exactly what I have...
{
"_id" : ObjectId("58c2223e32daa04353e35bdc"),
"name" : "SSB",
"year" : 2001,
"description" : "Fun Game",
"picture" : "http://google.com",
"postDate" : "2017-01-03T08:51:45.888Z"
}
You see when I go to http://localhost:8080/games I am returned with an empty JSON and I just wanna know why. I am 70% sure, it is because it isn't connected to the right collection but I don't remember how to test that :(
I wanted to make this a comment but it won't let me because I don't have a 50 reputation, but I believe I found the issue.
const getGame = (req, res) => {
const { id } = req.params;
Game.findById(id, (err, game) => {
if (err) {
res.send(err);
}
res.json(game);
});
}
In this piece of code you are setting the id to req.params, but you need to set it to req.params.id which is what you passed in your route.
Should look like this:
const {id} = req.params.id;
If you logged id, you would probably get an object that says:
{ id: "[whatever_id_you_put_here]" }
however if you log req.params.id you should get the correct id you put in that spot..
The reason you're getting [] is because you're actually connected to the database and you are actually trying to "get" something, but that something doesn't exist so it sends an empty response.
I hope this helps..
I've looked through the mongoose API, and many questions on SO and on the google group, and still can't figure out updating embedded documents.
I'm trying to update this particular userListings object with the contents of args.
for (var i = 0; i < req.user.userListings.length; i++) {
if (req.user.userListings[i].listingId == req.params.listingId) {
User.update({
_id: req.user._id,
'userListings._id': req.user.userListings[i]._id
}, {
'userListings.isRead': args.isRead,
'userListings.isFavorite': args.isFavorite,
'userListings.isArchived': args.isArchived
}, function(err, user) {
res.send(user);
});
}
}
Here are the schemas:
var userListingSchema = new mongoose.Schema({
listingId: ObjectId,
isRead: {
type: Boolean,
default: true
},
isFavorite: {
type: Boolean,
default: false
},
isArchived: {
type: Boolean,
default: false
}
});
var userSchema = new mongoose.Schema({
userListings: [userListingSchema]
});
This find also doesn't work, which is probably the first issue:
User.find({
'_id': req.user._id,
'userListings._id': req.user.userListings[i]._id
}, function(err, user) {
console.log(err ? err : user);
});
which returns:
{ stack: [Getter/Setter],
arguments: [ 'path', undefined ],
type: 'non_object_property_call',
message: [Getter/Setter] }
That should be the equivalent of this mongo client call:
db.users.find({'userListings._id': ObjectId("4e44850101fde3a3f3000002"), _id: ObjectId("4e4483912bb87f8ef2000212")})
Running:
mongoose v1.8.1
mongoose-auth v0.0.11
node v0.4.10
when you already have the user, you can just do something like this:
var listing = req.user.userListings.id(req.params.listingId);
listing.isRead = args.isRead;
listing.isFavorite = args.isFavorite;
listing.isArchived = args.isArchived;
req.user.save(function (err) {
// ...
});
as found here: http://mongoosejs.com/docs/subdocs.html
Finding a sub-document
Each document has an _id. DocumentArrays have a special id method for looking up a document by its _id.
var doc = parent.children.id(id);
* * warning * *
as #zach pointed out, you have to declare the sub-document's schema before the actual document 's schema to be able to use the id() method.
Is this just a mismatch on variables names?
You have user.userListings[i].listingId in the for loop but user.userListings[i]._id in the find.
Are you looking for listingId or _id?
You have to save the parent object, and markModified the nested document.
That´s the way we do it
exports.update = function(req, res) {
if(req.body._id) { delete req.body._id; }
Profile.findById(req.params.id, function (err, profile) {
if (err) { return handleError(res, err); }
if(!profile) { return res.send(404); }
var updated = _.merge(profile, req.body);
updated.markModified('NestedObj');
updated.save(function (err) {
if (err) { return handleError(res, err); }
return res.json(200, profile);
});
});
};