Maybe I'm not wording this properly but hopefully I can find some help with this. I've been playing around with mongoose schema's and boy its doing my head in with this issue..
I want to update a document on a collection under a specific ID, I've got all that working however. I'm running into an issue where since I never supplied values for others I dont want updated it makes them either all Null or deletes them if omitUndefined is turned on.
router.put('/api/playerinfo/:player_steamID/main_server', passport.authenticate('basic', {session: false}),
function(req, res){
const params = {
main_server: {
game_stats:{
kills: req.body.main_server.game_stats.kills,
deaths: req.body.main_server.game_stats.deaths,
}
}
};
PlayerInfo.findOneAndUpdate({player_steamID: req.body.player_steamID }, {$set: params}, { upsert: true, new: true }).then(playerinfo =>{
res.json(playerinfo)
});
});
For example:
Current Stored information
{
"name": "Jimbo",
"steamID": "123456",
"main_server": {
"game_stats": {
"kills": 3,
"deaths":0
}
}
}
Then if we used the above code to modify the fields.. But we did not supply a death value for that field, it would null out the bottom or remove it entirely if omit is true.
Sending postman update with the following:
{
"name": "Jimbo",
"steamID": "123456",
"main_server": {
"game_stats": {
"kills": 34
}
}
}
Updated Information
{
"name": "Jimbo",
"steamID": "123456",
"main_server": {
"game_stats": {
"kills": 34,
"deaths": null
}
}
}
What I would like to know is the best way to modify multiple fields without it "changing" the last value. if a field is missing. Is that possible?
IE: If i only supply kills value and leave json update for deaths blank it would retain the old value from deaths.
Thanks.
-- Fixed.
created a object inside $set then to update old values without replacing you need to wrap them in quotes. 'main_server.game_stats.kills' : req.body.....kills etc.
Use $set to update only certain fields.
PlayerInfo.findOneAndUpdate({steamID: req.body.steamID },{ $set: {'yourcoll.$.someField': 'Value'} }, { upsert: true, new: true }).then(playerinfo =>{
res.json(playerinfo)
});
Documentation:
https://docs.mongodb.com/manual/reference/operator/update/set/
Fixed. created a object inside $set then to update old values without replacing you need to wrap them in quotes. 'main_server.game_stats.kills' : req.body.....kills etc.
I also did a for loop in the object and assigned props to handle multiple values or single if passed through from json.
You can try just put part of model, which contains specific field for update
_userModelRepository.updateUser( { email: req.user.email }, { specificField: specificValue});
Here's schema implementation
updateUser = function(query, params){
return _userModelRepository.findOneAndUpdate(query, params, function(err, result) {
if (err) {
throw err;
}
});
}
What I did was
retrieve the original value in hidden input field using Ejs something like:
<input type="hidden" name="nameOf_thefield" value="<%= variable %>" />
Pass the value req.body.nameOf_thefield to the variable which you wish not to change
Related
I am trying to replace/update a whole object in an array to it's latest values, but I cannot get it to work.
Db looks like this: (Note: there is only 1 main object in this collection)
{
"_id": {...},
"something that doesnt matter": {...},
"var1": {
"var2": [{...}, {...}, {...}, {...}, {...}],
"var3": [{...}, {...}, {...}, {...}, {...}]
},
"something that doesnt matter": {...}
}
I need to update a certain object from array var2, I have the object ID or there is a custom ID in the object that I can also get it with (id == updatedObject.id)
This worked but I cannot get it to work with a custom array id
await db.collection("collectionName").findOneAndUpdate(
{"var1.var2": { $exists: true }},
{ $set: { "var1.var2.1": updatedObject } }
);
I have the ID of the object already in the array on the db, but idk how to update it from var1.var2.ID,
so basically what I need is { $set: { "var1.var2.**ID**": updatedObject } } but I cant seem to find out how to get it to work.
Cause I dont want to update the whole array, and I also dont want to update a single variable in the object. I need to update the whole object.
Thank you in advance for your replies.
Have you tried as below
await db.collection("collectionName").findOneAndUpdate(
{
"var1.var2.id": id // id value (or any matching field) of object inside array you want to update
},
{
$set: {
"var1.var2.$": updatedObject // Update with new object
}
}
);
Hope this official mongodb documentation helps better for your requirement.
Sorry, I'm not able to comment but the above answer is almost correct except that you have to filter by var1.var2._id instead of var1.var2.id because mongodb default ID field is _id
i want to update particular child's value which is actually present inside the object and wants all my rest value be the same.
i want to use mongoose npm package.
for example:
basic:{
name: "ABC",
mobile: 1234567890,
age: 20
},
other:{
pincode: 123456,
email: "abc#abc.com"
}
My Code
Model.findOneAndUpdate(
{ "basic.mobile": 1234567890 },
{
basic:{ name: "CDE"}
},
(err, doc) => {
if (err) return res.send({ error: err });
res.send(`updated`);
}
);
it works but it override the previous basic data and create a new one which i provided. it should update but also rest value should be there.
how can i do this?
Your question contains the answer. For Filter you are referring a single field using dot operator properly that is
"basic.mobile": 1234567890
You should do similar thing for update as well, that is the second argument of your function call, the way you have defined is wrong becuase it is a new object - that should be used when you want replace whole basic object in DB. If you want to just update the name field then you should use dot operator like below.
"basic.name":"CDE"
So the whole function would look like below.
Model.findOneAndUpdate(
{ "basic.mobile": 1234567890 },
{ "basic.name": "CDE"},
(err, doc) => {
if (err) return res.send({ error: err });
res.send(`updated`);
}
);
In the following example, assume the document is in the db.people collection.
How to remove the 3rd element of the interests array by it's index?
{
"_id" : ObjectId("4d1cb5de451600000000497a"),
"name" : "dannie",
"interests" : [
"guitar",
"programming",
"gadgets",
"reading"
]
}
This is my current solution:
var interests = db.people.findOne({"name":"dannie"}).interests;
interests.splice(2,1)
db.people.update({"name":"dannie"}, {"$set" : {"interests" : interests}});
Is there a more direct way?
There is no straight way of pulling/removing by array index. In fact, this is an open issue http://jira.mongodb.org/browse/SERVER-1014 , you may vote for it.
The workaround is using $unset and then $pull:
db.lists.update({}, {$unset : {"interests.3" : 1 }})
db.lists.update({}, {$pull : {"interests" : null}})
Update: as mentioned in some of the comments this approach is not atomic and can cause some race conditions if other clients read and/or write between the two operations. If we need the operation to be atomic, we could:
Read the document from the database
Update the document and remove the item in the array
Replace the document in the database. To ensure the document has not changed since we read it, we can use the update if current pattern described in the mongo docs
You can use $pull modifier of update operation for removing a particular element in an array. In case you provided a query will look like this:
db.people.update({"name":"dannie"}, {'$pull': {"interests": "guitar"}})
Also, you may consider using $pullAll for removing all occurrences. More about this on the official documentation page - http://www.mongodb.org/display/DOCS/Updating#Updating-%24pull
This doesn't use index as a criteria for removing an element, but still might help in cases similar to yours. IMO, using indexes for addressing elements inside an array is not very reliable since mongodb isn't consistent on an elements order as fas as I know.
in Mongodb 4.2 you can do this:
db.example.update({}, [
{$set: {field: {
$concatArrays: [
{$slice: ["$field", P]},
{$slice: ["$field", {$add: [1, P]}, {$size: "$field"}]}
]
}}}
]);
P is the index of element you want to remove from array.
If you want to remove from P till end:
db.example.update({}, [
{ $set: { field: { $slice: ["$field", 1] } } },
]);
Starting in Mongo 4.4, the $function aggregation operator allows applying a custom javascript function to implement behaviour not supported by the MongoDB Query Language.
For instance, in order to update an array by removing an element at a given index:
// { "name": "dannie", "interests": ["guitar", "programming", "gadgets", "reading"] }
db.collection.update(
{ "name": "dannie" },
[{ $set:
{ "interests":
{ $function: {
body: function(interests) { interests.splice(2, 1); return interests; },
args: ["$interests"],
lang: "js"
}}
}
}]
)
// { "name": "dannie", "interests": ["guitar", "programming", "reading"] }
$function takes 3 parameters:
body, which is the function to apply, whose parameter is the array to modify. The function here simply consists in using splice to remove 1 element at index 2.
args, which contains the fields from the record that the body function takes as parameter. In our case "$interests".
lang, which is the language in which the body function is written. Only js is currently available.
Rather than using the unset (as in the accepted answer), I solve this by setting the field to a unique value (i.e. not NULL) and then immediately pulling that value. A little safer from an asynch perspective. Here is the code:
var update = {};
var key = "ToBePulled_"+ new Date().toString();
update['feedback.'+index] = key;
Venues.update(venueId, {$set: update});
return Venues.update(venueId, {$pull: {feedback: key}});
Hopefully mongo will address this, perhaps by extending the $position modifier to support $pull as well as $push.
I would recommend using a GUID (I tend to use ObjectID) field, or an auto-incrementing field for each sub-document in the array.
With this GUID it is easy to issue a $pull and be sure that the correct one will be pulled. Same goes for other array operations.
For people who are searching an answer using mongoose with nodejs. This is how I do it.
exports.deletePregunta = function (req, res) {
let codTest = req.params.tCodigo;
let indexPregunta = req.body.pregunta; // the index that come from frontend
let inPregunta = `tPreguntas.0.pregunta.${indexPregunta}`; // my field in my db
let inOpciones = `tPreguntas.0.opciones.${indexPregunta}`; // my other field in my db
let inTipo = `tPreguntas.0.tipo.${indexPregunta}`; // my other field in my db
Test.findOneAndUpdate({ tCodigo: codTest },
{
'$unset': {
[inPregunta]: 1, // put the field with []
[inOpciones]: 1,
[inTipo]: 1
}
}).then(()=>{
Test.findOneAndUpdate({ tCodigo: codTest }, {
'$pull': {
'tPreguntas.0.pregunta': null,
'tPreguntas.0.opciones': null,
'tPreguntas.0.tipo': null
}
}).then(testModificado => {
if (!testModificado) {
res.status(404).send({ accion: 'deletePregunta', message: 'No se ha podido borrar esa pregunta ' });
} else {
res.status(200).send({ accion: 'deletePregunta', message: 'Pregunta borrada correctamente' });
}
})}).catch(err => { res.status(500).send({ accion: 'deletePregunta', message: 'error en la base de datos ' + err }); });
}
I can rewrite this answer if it dont understand very well, but I think is okay.
Hope this help you, I lost a lot of time facing this issue.
It is little bit late but some may find it useful who are using robo3t-
db.getCollection('people').update(
{"name":"dannie"},
{ $pull:
{
interests: "guitar" // you can change value to
}
},
{ multi: true }
);
If you have values something like -
property: [
{
"key" : "key1",
"value" : "value 1"
},
{
"key" : "key2",
"value" : "value 2"
},
{
"key" : "key3",
"value" : "value 3"
}
]
and you want to delete a record where the key is key3 then you can use something -
db.getCollection('people').update(
{"name":"dannie"},
{ $pull:
{
property: { key: "key3"} // you can change value to
}
},
{ multi: true }
);
The same goes for the nested property.
this can be done using $pop operator,
db.getCollection('collection_name').updateOne( {}, {$pop: {"path_to_array_object":1}})
I'm trying to figure out how Mongoose and MongoDB works... I'm really new to them, and I can't seem to figure how to return values based on a find statement, where some of the given parameters in the query possible are null - is there an attribute I can set for this or something?
To explain it further, I have a web page that has different input fields that are used to search for a company, however they're not all mandatory.
var Company = mongoose.model('Company');
Company.find({companyName: req.query.companyName, position: req.query.position,
areaOfExpertise: req.query.areaOfExpertise, zip: req.query.zip,
country: req.query.country}, function(err, docs) {
res.json(docs);
});
By filling out all the input fields on the webpage I get a result back, but only that specific one which matches. Let's say I only fill out country, it returns nothing because the rest are empty, but I wish to return all rows which are e.g. in Germany. I hope I expressed myself clearly enough.
You need to wrap the queries with the $or logic operator, for example
var Company = mongoose.model('Company');
Company.find(
{
"$or": [
{ "companyName": req.query.companyName },
{ "position": req.query.position },
{ "areaOfExpertise": req.query.areaOfExpertise },
{ "zip": req.query.zip },
{ "country": req.query.country }
]
}, function(err, docs) {
res.json(docs);
}
);
Another approach would be to construct a query that checks for empty parameters, if they are not null then include it as part of the query. For example, you can just use the req.query object as your query assuming the keys are the same as your document's field, as in the following:
/*
the req.query object will only have two parameters/keys e.g.
req.query = {
position: "Developer",
country: "France"
}
*/
var Company = mongoose.model('Company');
Company.find(req.query, function(err, docs) {
if (err) throw err;
res.json(docs);
});
In the above, the req.query object acts as the query and has an implicit logical AND operation since MongoDB provides an implicit AND operation when specifying a comma separated list of expressions. Using an explicit AND with the $and operator is necessary when the same field or operator has to be specified in multiple expressions.
If you are after a query that satisfies both logical AND and OR i.e. return all documents that match the conditions of both clauses for example given a query for position AND country OR any other fields then you may tweak the query to:
var Company = mongoose.model('Company');
Company.find(
{
"$or": [
{ "companyName": req.query.companyName },
{
"position": req.query.position,
"country": req.query.country
},
{ "areaOfExpertise": req.query.areaOfExpertise },
{ "zip": req.query.zip }
]
}, function(err, docs) {
res.json(docs);
}
);
but then again this could be subject to what query parameters need to be joined as mandatory etc.
I simply ended up deleting the parameters in the query in case they were empty. It seems all the text fields in the submit are submitted as "" (empty). Since there are no such values in the database, it would return nothing. So simple it never crossed my mind...
Example:
if (req.query.companyName == "") {
delete req.query.companyName;
}
I'm trying to insert/update an array of strings in a mongodb document using some typescript code running in NodeJS.
The following code is typescript but I guess JS developers will get it w/o any problems:
export function addEvents(entityId: string,
events: string[] ,
callback: () => void) {
db.collection('events', function(error, eventCollection) {
if(error) {
console.error(error); return;
}
eventCollection.update({ _id: entityId }, { "$pushAll ":
{ events: events }},
function(error, result) {
if(error) {
console.error(error); return;
}
callback();
});
});
}
the document have the following structure:
{
_id : string
events : ["array","of","strings"]
}
I simply want to append an array strings at the end of the existing array for a specific _id.
I don't quite get if I should use update,save, $push ,$pushall etc.
Can someone explain?
If I understood correctly the problem is that pushAll does nothing or update returns error? Maybe copy-paste mistake in your example but I think you have typo here.
{ "$pushAll ": { events: events }}
It should be
{ $pushAll: { events: events }}
Your combination of update and $pushAll looks like the best choice for what you're doing here -- it's for appending an array to an existing array. $push is for adding an element to an array. save would involve getting the existing events array, appending to it, then saving the document.
The extra space in "$pushAll " needs to be removed. It may have quotes: "$pushAll".
Found the problem, I needed to pass "{ upsert = true }" as a third argument to the update function.
To achieve 'upsert' semantics in this case, you'd need to use $addToSet. If you have an array of values to add, you'd need to throw in the $each modifier. From mongo shell:
db.events.update(
{ _id: entityId },
{ $addToSet: { $each: events } }
)