I am trying to find the best way to do CRUD operations on a document that has a embedded document. [1 Business --> Many Services]
I have an business object that looks like this:
{
_id: "ZChonAoaksZ7kCvca",
name: "ABC",
description: "random description",
services: [
{ _id: "ZChonAoaksZ7kCvcf", service:"123", bufferEnd: 5 },
{ _id: "ZChonAoaksZ7kCvcg", service: "345", bufferEnd: 5 },
{ _id: "ZChonAoaksZ7kCvch", service: "567", bufferEnd: 5 },
]
}
Selections: i query my collection using:
collectionname.find({'services._id': 'ZChonAoaksZ7kCvcf'}).fetch()
as expected it simply returns the entire document. How can i return only the single sub document not the business object or an entire array? Is there a way just to get one item from the parent document such as:
{ _id: "ZChonAoaksZ7kCvcf", service:"123", bufferEnd: 5 }
Thanks
The 3 CRUD operations to edit Arrays within a MongoDB object from Meteor (care Update is the tricky one) are as follows:
Add a new item to document array:
Business.update({ _id: Business.findOne()._id }, {
$addToSet: {
services: {
_id: Random.id(),
service: $('#new_service_name').val(),
bufferEnd: $('#new_service_description').val(),
}
}
);
Edit an existing item in document array
var bus = Business.findOne().services;
var indexToUpdate = _.indexOf(_.pluck(bus, '_id'), Session.get('Service_selectedId'));
var modifier = { $set: {} };
modifier.$set["services." + indexToUpdate + ".service"] = $('#service_name').val();
modifier.$set["services." + indexToUpdate + ".description"] = $('#service_description').val();
Business.update(Business.findOne()._id, modifier);
Delete Operation
Business.update({ _id: Business.findOne()._id }, {
$pull: { services: { _id: Session.get('Service_selectedId') } }
});
You can filter the result after it's fetched:
var wholeDoc = Documents.findOne({'services._id': 'ZChonAoaksZ7kCvcf'});
var service = _.find(wholeDoc.services, function(service) {
return service._id === 'ZChonAoaksZ7kCvcf',
});
Related
I just want to Publish the relational Data for a Publication to client, but the issue is my Relational Data field is array of ID's of a Different Collection, I tried Different Packages but all works with single Relational ID but not working with Array of relational ID's, let assume I have two Collection Companies and Meteor.users below is my Company Document Looks like
{
_id : "dYo4tqpZms9j8aG4C"
owner : "yjzakAgYWejmJcuHz"
name : "Labbaik Waters"
peoples : ["yjzakAgYWejmJcuHz", "yjzakAgYWejmJcuHz"],
createdAt: "2019-09-18T15:33:29.952+00:00"
}
here you can see peoples field contains the user ID's as Array, so How I publish this userId's as user Documents, as for example I tried the most popular meteor package named publishComposit, when I tried Loop in Children's find, I got undefined in children i.e below
publishComposite('compoundCompanies', {
find() {
// Find top ten highest scoring posts
return Companies.find({
owner: this.userId
}, {sort: {}});
},
children: [
{
find(company) {
let cursors = company.peoples.forEach(peopleId => {
console.log(peopleId)
return Meteor.users.find(
{ _id: peopleId },
{ fields: { profile: 1 } });
})
//here cursor undefined
console.log(cursors)
return cursors
}
}
]
});
and if I implement async loop in children's find I got error like below code
publishComposite('compoundCompanies', {
find() {
// Find top ten highest scoring posts
return Companies.find({
owner: this.userId
}, {sort: {}});
},
children: [
{
async find(company) {
let cursors = await company.peoples.forEach(peopleId => {
console.log(peopleId)
return Meteor.users.find(
{ _id: peopleId },
{ fields: { profile: 1 } });
})
//here cursor undefined
console.log(cursors)
return cursors
}
}
]
});
the error occured in above code is Exception in callback of async function: TypeError: this.cursor._getCollectionName is not a function
I don't know what I am exactly doing wrong here, or implementing package function not as intended any help will be greatly appropriated
EDIT: my desired result should be full user documents instead of ID no matter it mapped in same peoples array or as another fields I just want as below
{
_id: "dYo4tqpZms9j8aG4C",
owner: "yjzakAgYWejmJcuHz",
name: "Labbaik Waters",
peoples: [
{
profile: {firstName: "Abdul", lastName: "Hameed"},
_id: "yjzakAgYWejmJcuHz"
}
],
createdAt: "2019-09-18T15:33:29.952+00:00"
}
I ran into a similar problem couple of days ago. There are two problems with the provided code. First, using async; it's not needed and rather complicates things. Second, publishComposite relies on receiving one cursor not multiple within its children to work properly.
Below is a snippet of the code used to solve the problem I had, hopefully you can replicate it.
Meteor.publishComposite("table.conversations", function(table, ids, fields) {
if (!this.userId) {
return this.ready();
}
check(table, String);
check(ids, Array);
check(fields, Match.Optional(Object));
return {
find() {
return Conversation.find(
{
_id: {
$in: ids
}
},
{ fields }
);
},
children: [
{
find(conversation) {
// constructing one big cursor that entails all of the documents in one single go
// as publish composite cannot work with multiple cursors at once
return User.find(
{ _id: { $in: conversation.participants } },
{ fields: { profile: 1, roles: 1, emails: 1 } }
);
}
}
]
};
});
Forms of this question have been asked a few times, but I've been unable to find a solution:
I have a schema like this (simplified):
StatusObject = new SimpleSchema({
statusArray: [statusSchema]
});
where statusSchema is
{
topicId:{
type: String,
optional: true
},
someInfo:{
type: Number,
optional: true,
decimal: true
},
otherInfo:{
type: Number,
optional: true
}
}
I am trying to upsert - with the following meteor method code:
var upsertResult = BasicInfo.update({
userId: this.userId,
statusArray: {
$elemMatch: { topicId : newStatus.topicId }
}
}, {
$set: {
"statusArray.$.topicId": newStatus.topicId,
"statusArray.$.someInfo": newStatus.someInfo,
"statusArray.$.otherInfo": newStatus.otherInfo
}
}, {
multi: true,
upsert: true
});
But I keep getting an error: statusArray must be an array
I thought by adding the $, I was making sure it is recognized as an array? What am I missing?
It seems (after your clarification comments), that you want to find a document with particular userId and modify its statusArray array using one of these scenarios:
Update existing object with particular topicId value;
Add a new object if the array doens't have one with particular topicId value.
Unfortunately, you can't make it work using just one DB query, so it should be like this:
// try to update record
const updateResult = BasicInfo.update({
userId: this.userId,
'statusArray.topicId': newStatus.topicId
}, {
$set: {
"statusArray.$": newStatus
}
});
if (!updateResult) {
// insert new record to array or create new document
BasicInfo.update({
userId: this.userId
}, {
$push: {
statusArray: newStatus
},
$setOnInsert: {
// other needed fields
}
}, {
upsert: true
});
}
Your code is treating StatusArray as an object,
Before you do the upsert, build the status array first, assuming that your current value is currentRecord
newStatusArray = currentRecord.statusArray
newStatusArray.push({
topicId: newStatus.topicId,
someInfo : newStatus.someInfo,
otherInfo: newStatus.otherInfo
})
and in the upsert, simply refer to it like this
$set: { statusArray: newStatusArray}
I have a collection like this one:
//Groups Collection
{
_id:1,
members: [
{
memberId: 'A1B2',
content: [1,2,3]
},
{
memberId: 'C10B',
content: [4,5,6]
}
]
},
{
_id:2,
members: [
{
memberId: 'A1B2',
content: [7,8,9]
},
{
memberId: 'F804',
content: [10,11,12]
}
]
}
and another Collection like this one:
//Users Collection
{
_id: 'A1B2',
name: 'Newton'
},
{
_id: 'C10B',
name: 'Gauss'
},
{
_id: 'F804',
name: 'Leibniz'
}
And I need a publication with all ids of users in Groups array with _Id = 1. I tryed:
Meteor.publish('themembers',idGroup,function() {
return Users.find({_id:{$in:Groups.findOne(idGroup).members.map(function(e) {return e.memberId})}});
});
then I subscribe:
Template.problem.onCreated(function() {
Meteor.subscribe('themembers',1);
});
Now I can access the members in the helper:
Template.problem.helpers({
members: function() {
return Users.find();
}
});
and the helpers works right too.
But now, If I add a new member to the group, it not appears in the list, ... my subscriptions seems not to be reactive.
What I doing Wrong?
Typical issue with Meteor:
You should look at peerlibrary:reactive-publish
https://github.com/peerlibrary/meteor-reactive-publish
I have the following SimpleSchema
Schema.Team = new SimpleSchema({
name:{
type:String
},
members: {
type: [Schema.User],
optional:true
}
});
I would like to insert (on the server) a new team document with the current user, as a reference (not as an embedded document).
I have tried:
Teams.insert({name:"theName",members:[Meteor.user()]}) // works but insert the user as an embedded doc.
Teams.insert({name:"theName",members:[Meteor.user()._id]}) // Error: 0 must be an object
I have also tried in two steps:
var id = Teams.insert({name:teamName});
Teams.update({ _id: id },{ $push: { 'users': Meteor.user()._id } });
Then I have another error I don't understand: Error: When the modifier option is true, validation object must have at least one operator
So how can I insert a document with a reference to another schema?
If you just want to store an array of userIds in your Team collection try:
Schema.Team = new SimpleSchema({
name:{
type:String
},
members: {
type: [String],
optional:true
}
});
Then
Teams.insert({ name: "theName", members: [Meteor.userId()] });
Should work. Later when you want to add an additional id you can just:
Teams.update({ _id: teamId },{ $addToSet: { members: Meteor.userId() }});
The following is probably the syntax you are after, assuming you are also using AutoForm.
If you are using collection2, you can also add an autovalue for when a team is created to automatically add the creator to that team for more convenience.
Schema.Team = new SimpleSchema({
name: {
type:String
},
members: {
type: [String],
defaultValue: [],
allowedValues: function () {
// only allow references to the user collection.
return Meteor.users.find().map(function (doc) {
return doc._id
});
},
autoform: {
// if using autoform, this will display their username as the option instead of their id.
options: function () {
return Meteor.users.find().map(function (doc) {
return {
value: doc._id,
label: doc.username // or something
}
})
}
},
autoValue: function () {
if (this.isInsert && !this.isFromTrustedCode) {
return [this.userId];
}
}
}
});
I have a schema defined below and how can I change the predefined schema key (summary: key) via meteor template?
Schemas.Books = new SimpleSchema(
{
summary: {
type: String
}
}
);
For instance, I want to change this key through a session variable that was defined by router or through a user input.
Not Sure, Try this
If your schema is like this
Books = new SimpleSchema(
{
summary: {
type: String
}
}
);
then in tempalte helpers,
Books._schema.summary.type = function() {
return Session.get("typeValue");
};
In my project I have schema like this
RegisterSchema = new SimpleSchema({
name: {
type: String
},
email: {
type: String,
regEx: SimpleSchema.RegEx.Email
},
password: {
type: String,
label: "Password",
min: 8
},
confirmPassword: {
type: String,
label: "Confirm Password",
min: 8,
custom: function () {
if (this.value !== this.field('password').value) {
return "passwordMismatch";
}
}
}
});
and I'm dynamically setting optional value for email like
RegisterSchema._schema.email.optional = function() { return true };
this worked for me.
All d best
This is not the thing that I'm trying to do but I have learned a new trick : )
I want to change the schema key that I described above like this.
Books = new SimpleSchema(
{
bookName: {
type: String
}
}
);
Changing summary: with bookName:
Actually I want to define schema keys dynamically with respect to user information (userId, userName etc.).