I have the following schemas:
// ingredient
var ingredSchema = new Schema({
name: String,
cost: Number
});
// order
var orderSchema = new Schema({
cusName: String,
ingredients: [{type: Schema.Types.ObjectId, ref: 'Ingredient'}]
});
// create model
var Ingredient = mongoose.model('Ingredient', ingredSchema);
var Order = mongoose.model('Order', orderSchema);
I have already saved a bunch ingredients in a collection ingredients and have a UI where users choose a set of ingredients for their burgers. I then try to save an order for a burger in another collection orders within the same database burgers like this:
// get order info from the form
var newOrder = new Order({ cusName: req.body.name,
ingredients: req.body.ingredients });
newOrder.save(function(err) {
if (err)
return console.log('Could not save your new order', err);
res.redirect('/order');
});
The call to save an order generates the following error:
{ message: Cast to ObjectId failed for value xxx at path 'ingredients',
name: 'CastError',
type: ObjectId,
value: xxx,
path: 'ingredients' }
I use mongoose version 3.6.11. Please help me hack this.
PS: req.body.ingredients is an array built from checkboxes.
There are 2 possible problems with your code right now:
1. req.body.ingredients will not be an array of ObjectIds, and mongoose wants it alright (I doubt of this one).
You should cast every ingredient to ObjectId first. Supposing req.body.ingredients is array, then you would do something like this:
var casted = req.body.ingredients.map(function( ingredient ) {
return mongoose.Types.ObjectId(ingredient);
});
I did not tested this, see if it'll work for you.
2. Mongoose is trying to cast your ingredients, but one of them is not a valid ObjectId
ObjectId should be composed of 24 hex chars, check whether you're passing values like this to Mongoose.
Please, post the result if one of them work for you :)
Related
How can I do to pass the id of a document from outside and not that mongoose generates it?
I need the objects to be stored with the id I tell them, but mongoose overwrites it and saves it with the one he wants. I tried several ways now and nothing happens.
It is an entity that I am distributing through events in several databases, so I need it to be stored with the id I want to maintain the integrity of the data.
Now I have this and it says "document must have an _id before saving", but the id I have already put it, does not recognize it.
The scheme is like this:
const schema = new Schema({
_id: { type: String },
name : { type: String },
});
I also tried with this, and the error is the same:
const schema = new Schema({
_id: { type : String },
name : { type: String },
},
{
_id: false
});
I am passing the object like this:
Item.create({ _id: 'my uuid here', name: 'something' });
but when it is saved it remains with the id generated by mongoose replacing mine, that is, it changes it to me with a _id: '5twt563e3j5i34knrwnt43w'
Your syntax should work, but sometimes mongoose acts weird.
You can try this syntax (works on my project) :
const item = new Item({ name: 'something' });
item._id = 'my uuid here';
await item.save();
Instead of using a random uuid, you need to use a mongoDB objectID. Mongoose can also create that,
var mongoose = require('mongoose');
var id = mongoose.Types.ObjectId();
Store this id in the collection,
Item.create({ _id: id, name: 'something' });
I originally have these two schemas:
var UserSchema = new Schema({
first: String,
last: String
});
var SaleSchema = new Schema({
createdAt: Date,
registeredBy: { type: Schema.ObjectId, ref: 'User' }
});
But I want to edit my SaleSchema to save the user name instead of the ID, so I changed it for:
var SaleSchema = new Schema({
createdAt: Date,
registeredBy: String
});
Next, I wanted to edit all the Sales documents and replace the user IDs on registeredBy for the user's full name, but I can't seem to be able to perform a find query for the old ID's.
Long story short, this query returns no matches on mongoose, but it works perfectly using the mongo console:
Mongoose
Sale.find({ registeredBy: '57ea0cbb47431f0b43b87d42' })
.then(results => res.json(results))
.catch(err => res.status(500).json(err));
// result: []
MongoDB console
db.sales.find({ registeredBy: '57ea0cbb47431f0b43b87d42' })
// result: 8 elements
After I modify my schema's property back to ObjectId, the mongoose query works again. Since I need to migrate to a new datatype, I want to be able to query and store both types of values. Is this possible?
Good question this is a complicated edge case. I am not super familiar with Mongoose specifically, but one way to do this would be to migrate your data at a lower level. For example, create a mongo script that uses the low-level mongo API to do the migration, something along the lines of:
db.sales.find().forEach(function(doc){
var user = db.users.find({ _id: doc.registeredBy });
db.sales.update({ _id: doc._id, }, {
$set: { registeredBy: user.first + ' ' + user.last }
});
});
This is similar to what a module like https://github.com/balmasi/migrate-mongoose does, but I've personally found it easier to use mongo scripts on the cli directly.
mongo < sale-schema-migration.js
This is my players model
var mongoose = require('mongoose'),Schema = mongoose.Schema;
var playerSchema = Schema({
name: String,
password: String,
country: String
});
mongoose.model('players', playerSchema);
This is my countries model
var mongoose = require('mongoose'),Schema = mongoose.Schema;
var countrySchema = Schema({
name: String,
isActive: Boolean
});
mongoose.model('countries', countrySchema);
And this is app.js
mongoose.model('players').find({}, function (err, players) {
console.log(players);
if (err) {
return console.error(err);
} else {
res.format({
html: function(){
res.render('players/index', {
title: 'Players List',
"players" : players
});
},
json: function(){
res.json(players);
}
});
}
});
In players model I have countryId and in countries model I have corresponding countryName. Now I want to find players with country name with same find() query.
you can use mongoose populate method
refer this link: mongoose populate
in your example, it something like this:
mongoose.model('players').find().populate('country').exec(function(err,players){
});
this will give you result of both countryID and Name
mongodb is nosql-database, not a relational database like mysql/postgre. So modelling your data is not like relationaldatabses where you can make one query that joins two tables (in mongodb, "tables" are called collections).
In MongoDB and your current Schema you will first need to find the countryId of the country you want. And then find the players that have that country.
Alternatives;
you can store the countryName directly on the player collection
you can store the playerId's in an array within the the country collection
further more, in your playerSchema, country should be a ObjectId, not a String.
Allora, I'm using mongoose for the first time and I decided to create 2 schemes: the first one represents a user and the second one represents his enquires. Users have an array of enquires like:
var userSchema = new mongoose.Schema({
name: String,
enquires: { type : [Enquire.schema] , "default" : [] },
});
var enquireSchema = new mongoose.Schema({
status: {type: String, 'default': 'pending'},
enquire: String,
});
I see that if I search for an enquire and update its status, it doesn't update the same enquire on the user's array, meaning that they are different object. I don't want to save an array of IDs as it will be the same as a relational database, so I see only 1 solution which is forgetting about the enquire scheme and use only the User scheme. Is it the way mongoose works? For every relationship do I have to insert everything like nested object?
I think you should use references to achieve what you want to achieve.
For more information on mongoose references and populate see Mongoose Populate documentation.
Try this, It may help you.
User Schema :
var userSchema = new mongoose.Schema({
name: String,
enquires: [{ type : mongoose.Schema.Types.ObjectId , ref : 'Enquiry' }]//array of enquiries
});
var User = mongoose.model('User',userSchema );
module.exports = User;
Enquiry Schema :
var enquireSchema = new mongoose.Schema({
status: {type: String, 'default': 'pending'},
enquire: String,
});
var Enquiry = mongoose.model('Enquiry',enquireSchema );
module.exports = Enquiry ;
Working :
create a new Enquiry.
Push it's ID(_id) into user's enquires array.
var enquiry = new Enquiry();
enquiry.enquire = "Dummy enquiry";//set the enquiry
enquiry.save(function(err,result){
if(!err){
//push 'result._id' into users enquires array
}
});
whenever you update an enquiry, it will be automatically updated in
user's document.
use populate to retrieve user's enquiries.
You can embed sub documents (entity) which has id and is like a document or embed native array like a normal property.
And I think the correct definition for yours is :
var enquireSchema = new mongoose.Schema({
status: {type: String, 'default': 'pending'},
enquire: String,
});
var userSchema = new mongoose.Schema({
name: String,
enquires: { type : [enquireSchema] , "default" : [] },
});
If you use refs in embedded link then there are two separate collections and be like relational db's.
I have two Mongoose schemas, User and Code. Each user can have many codes.
user.js:
var mongoose = require('mongoose');
var codeSchema = require('./code');
var userSchema = mongoose.Schema({
google: {
id: String,
token: String,
email: String,
name: String
},
codes: [codeSchema]
}, {collection : 'users'});
code.js:
var mongoose = require('mongoose');
var codeSchema = mongoose.Schema({
code: String,
name: String,
link: String
}, {collection: 'codes'});
module.exports = codeSchema;
My problem is, whenever I access a user's array of codes by user.codes, I get something like { _id: 56c4c82a37273dc2b756a0ce },{ _id: 56c4c82a37273dc2b756a0cd } rather than the JSON for a code.
What am I missing?
You're missing populate.
By default, Mongoose will only give you the _ids of any references made in a document. populate allows you to fill out nested documents.
userSchema.findOne({}).populate('codes');
More here
please check that you are inserting other values or not this can be a case . Please write how you are inserting in array . I have two other way check out
There are two way to do this
1-->either you save refrence id of codeschema and
2--> is you can insert whole codeschema in array
1. codes: {
type: mongooseSchema.ObjectId,
ref: 'codeSchema',
required: true
},
and when all data is in array 56c4c82a37273dc2b756a0ce,56c4c82a37273dc2b756a0cd
that can be done by this query
domain.User.update({_id:id}
,{$addToSet:{code:codeObjvalue}},
function(err,res){});
and then populate them by this
domain.users.find({},'code')
.populate('code','code color email').
exec(function(err,results){
callback(err, results);
});
2-- and second is to insert whole code schema in userschema
create a codeschema object and add in set like this
var codeobj={};
codeobj.code="xyz";
codeobj.email="xyz#gmail.com"
var codeobject = new domain.code(codeobj);
domain.User.update({_id:id},{$addToSet:{code:codeobject}},function(err,user1){
});
Woops, turns out I was using the wrong dataset, not adding the codes properly (facepalm). Thanks to everyone who answered!