Hello guys I need your help,
I am making a simple app where users can create a post about their favorite person so there are different fields to write text, now I've made the functionality for the user to create any new field with a title of their choice like if a person "a" want to add a new field with name age and custom "b" wants to add a new field with name country, so I've made this but how can I get that custom data automatically in my database so if the user will create a new field with any name I want that field and text written in it in my database. Can you help me with that?
and please try to explain to me in a simple manner am just a beginner with mongoDB.
there was a guy who told me to do this with $addFields aggregation but he didn't tell me anything else I saw many documents but am not getting How can I make this done :(
thank you sooooo much in advance. :)
here's my schema for default fields:
const personSchema = new Schema({
firstName: String,
lastName: String,
birthDay: String,
gender: String,
pronouns: String,
relationship: String,
user: {
id: {
type: mongoose.Schema.Types.ObjectId,
ref: "User",
},
username: String,
}
});
You simply have to pass the strict option to false while you create your schema!
By default, mongoose will set this option to true so you can't send any unnecessary information to DB!
const personSchema = new Schema({
firstName: String,
lastName: String,
birthDay: String,
gender: String,
pronouns: String,
relationship: String,
user: {
id: {
type: mongoose.Schema.Types.ObjectId,
ref: "User",
},
username: String,
}
}, { strict: false });
https://mongoosejs.com/docs/guide.html#strict
Related
I have a custom GraphQL schema for a blogging application for my ReactJS app. The main model type is Post.
Post contains a number of properties that have a custom type eg Gallery: [MediaObject]. The majority of these properties with custom types are missing from the automatically generated CreatePostInput by AWS Amplify CLI. This means that I cannot create a Post object that has these properties with custom type.
The lack of these custom type properties is evident in the AppSync console, under Queries. In the Explorer, go to Mutations, click on CreatePost mutation, and you will see that 6 of the 21 properties for Post are missing. The missing properties are tags, attributes, seo, featuredImage, gallery and createdBy.
They are also missing in the autogenerated graphql schema in api > build > schema.graphql in the react app.
I have made multiple clean projects from scratch, and the problem is reproducible. I have updated the amplify cli to 4.51.2 and still no luck.
I would expect the CreatePostInput to have the associated inputs for all of the fields, not just comments (see the autogenerated CreatePostInput below) eg: attribute: AttributeInput, but these are not generated either. This would allow me to create a Post object that has these custom fields populated. However, only the CommentInput has been generated. What am I doing wrong here, or have I misunderstood something?
Thanks!
Below is my gql schema and both the autogenerated CreatePostInput and CommentInput:
type Post #model {
id: ID
createdBy: User
createdAt: AWSDateTime
updatedAt:AWSDateTime
type: PostType!
title: String!
status: Status
content: String!
excerpt: String
slug: AWSURL
wordpressId: Int
wordpressImageURLs: [AWSURL]
author: String
likes: Int
tags: [Tag]
attributes: Attribute
seo: Seo
featuredImage: MediaObject
gallery: [MediaObject]
comments: [Comment]
numberOfComments: Int
}
type User #model {
id: ID
username: String!
firstName: String
lastName: String
email: AWSEmail!
avatar: MediaObject
location: String
createdAt: AWSDateTime
updatedAt: AWSDateTime
Posts: [Post]
}
type Tag #model {
id: ID
postIds: [ID]
name: String!
}
type Attribute #model {
id: ID
postId: ID
link: String
imgUrl: AWSURL
ogImage: AWSURL
ogDescription: String
canonicalLink: AWSURL
}
type Seo #model {
id: ID
postId: ID
metaRobotsNoIndex: String
metaRobotsNoFollow: String
canonical: AWSURL
metaDesc: String
opengraphDescription: String
opengraphModifiedTime: AWSDateTime
opengraphPublishedTime: AWSDateTime
opengraphTitle: String
opengraphUrl: AWSURL
opengraphImage: AWSURL
twitterDescription: String
twitterImage: String
twitterTitle: String
schemaSeo: String
}
type Comment
{
id: ID
postId: ID!
createdBy: ID
author: String
createdAt: AWSDateTime
text: String!
likes: Int
}
type MediaObject #model {
id: ID
linkedId: ID
createdBy: ID
mediaItemUrl: AWSURL
srcSet: String
medium: AWSURL
thumb: AWSURL
sourceURL: AWSURL
description: String
bucket: String
region: String
key: String
type: MediaObjectType
}
type Like #model {
id: ID!
objectVotedOnID: ID!
createdBy: ID
createdAt: AWSDateTime
likeOn: LikeOnType
}
enum PostType {
TOOLS
BLOGS
INSPIRATIONS
NEWS
POSTS
NEWSLETTERS
}
enum LikeOnType {
POST
COMMENT
}
enum Status {
PUBLISH
DRAFT
}
enum MediaObjectType {
IMAGE
VIDEO
AUDIO
}
Autogenerated (only CreatePostInput and CommentInput have been included for brevity), found in amplify > backend > api > build > schema.graphql:
input CreatePostInput {
id: ID
createdAt: AWSDateTime
updatedAt: AWSDateTime
type: PostType!
title: String!
status: Status
content: String!
excerpt: String
slug: AWSURL
wordpressId: Int
wordpressImageURLs: [AWSURL]
author: String
likes: Int
comments: [CommentInput]
numberOfComments: Int
}
input CommentInput {
id: ID
postId: ID!
createdBy: ID
author: String
createdAt: AWSDateTime
text: String!
likes: Int
}
At least for the example, you cited, Post and MediaObject have a one-to-many relationship. That is, a single Post has many MediaObjects. You won't see the many relations of a one-to-many generated on the parent object for mutations.
When creating a parent object that has children, you'll need to do this in 2 steps.
Create the parent object, and return the id.
Using the parentId, create the N child objects.
Here is some documentation from Amplify on how to do this: https://docs.amplify.aws/cli/graphql-transformer/connection#has-many
To anyone else that notices this strange behaviour: The reason why CommentInput is included in the CreatePostInput, whilst the other custom types are not, is because Comment was the only type that I had forgot to label with an #model directive. I assume that this means that AppSync then views this type on the comments field as a set of nested fields, rather than an object with its own DynamoDB table. I have asked the AWS Amplify team and will update this answer when I hear more from them.
I am trying to add a document into an array studyList in my users collection.
So i have a collection users where i have name, etc.. and studyList.
When i click on a button buy into a DocumentItemComponent i want to add that document into this studyList array.
My code works partially because it adds the document into the array but when i click on another document it changes the first one, it doesn't add another document.
This is my code for the adding function:
addToStudyList(user) {
const userRef: AngularFirestoreDocument<any> = this.afs.doc(`users/${user.id}`);
const data: UserInterface = {
studyList: [{
title: this.document.title,
language: this.document.language,
description: this.document.description,
cover: this.document.cover,
category: this.document.category,
field: this.document.field,
id: this.document.id,
author: this.document.userUid,
urlDocument: this.document.urlDocument
}]
}
return userRef.set(data, {merge: true});
}
Can you help me, please?
Thank you! Have a good day!
There is no direct way to update an array inside a document, but if you are using Firestore, it provides arrayUnion and arrayRemove functions which you can use for adding/removing unique items in the array.
From firestore documentation https://firebase.google.com/docs/firestore/manage-data/add-data#update_elements_in_an_array :
Try this:
userRef.update({
studyList: firebase.firestore.FieldValue.arrayUnion(data)
});
This is because when you declare:
studyList: [{
title: this.document.title,
language: this.document.language,
description: this.document.description,
cover: this.document.cover,
category: this.document.category,
field: this.document.field,
id: this.document.id,
author: this.document.userUid,
urlDocument: this.document.urlDocument
}]
in this piece of code you are assigning just one object to the the studyList array which overwrites the existing array, instead you should utilize the existing user studyList array and push your new object into it, something like this:
addToStudyList(user) {
const userRef: AngularFirestoreDocument<any> = this.afs.doc(`users/${user.id}`);
user.studyList.push({
title: this.document.title,
language: this.document.language,
description: this.document.description,
cover: this.document.cover,
category: this.document.category,
field: this.document.field,
id: this.document.id,
author: this.document.userUid,
urlDocument: this.document.urlDocument
});
const data: UserInterface = {
studyList: user.studyList
}
return userRef.update(data);
}
I am using Formik to create a form of a book library where each item in the list would look like:
author: {
name: 'string',
titles: ['string']
}
I am having trouble trying to make a schema with Yup to validate those fields. I have:
schema = Yup.object().shape({
author: Yup.object().shape({
name: Yup.string().min().max().required('...')
}),
author: Yup.array().of(
Yup.object().shape({
titles: Yup.string().min().max().required('...')
})
)
});
The initial values are also:
{
author: {name: ''},
author: [{ titles: '' }]
}
My validation works for the array but not the name. I am assuming the issue is that I cannot have the same name for both of the elements in the object, however I do not know how to combine the two fields in both the initial values as well as the schema. I looked through Yup API and I noticed they had mixed() but I didn't understand how to implement with what I need. Is this way possible or would having validation for both of these possible?
Author is not an array, it's an object which contains an array and a string. Also, you're defining it twice:
schema = Yup.object().shape({
author: Yup.object().shape({
name: Yup.string().min().max().required('...'),
titles: Yup.arrayOf(Yup.string())
}),
});
Confused about why you have 2 author keys. The schema above corresponds to:
{
author: {
name: "hehyryg",
titles: ["title", "title2"]
}
}
Trying to query a subdocument array which contains ObjectId refs, and find one item.
The items are ObjectId's and get populated when I add a new lesson and 'assign' it to a specific location.
This mongoose schema shows what i mean.
var mongoose = require('mongoose');
var lessonNames = new mongoose.Schema({
day: {type: String },
name: {type: String},
startTime: {type: String},
endTime: {type: String}
});
var locationNames = new mongoose.Schema({
name: {type: String, required: true},
address: String,
lessons: [ { type: mongoose.Schema.Types.ObjectId, ref: 'lessonnames'}]
});
mongoose.model('lessonnames', lessonNames);
mongoose.model('locationnames', locationNames);
I have added a lesson to one location, and now i'm trying to find this specific lesson. I've tried a couple of methods, but none worked for me. Every time i get a null or undefined reported when i output the query to the console.log.
if (location.lessons && location.lessons.length > 0) {
loc
.findById(req.params.locationid)
.populate('lessons', '_id')
.exec(function (err, myLesson) {
console.log(myLesson.lessons)
});
When i execute the above statement, i see the following being generated in the nodejs console, with mongoose debugging enabled.
Mongoose: locationnames.findOne({ _id: ObjectId("56d4b687c4bcb5681a870cb5") }) { fields: undefined }
GET /api/locations/56d4b687c4bcb5681a870cb5/lesson/56d4b687c4bcb5681a870cb4
Mongoose: lessonnames.find({ _id: { '$in': [ ObjectId("56d4b687c4bcb5681a870cb4") ] } }) { fields: { _id: 1 } }
The code line below is the output from console.log. As you can see, the ObjectId is shown as part of the lessons array. But how do I make a query which 'selects' this ObjectId, so i can reference with it to a lesson.
[{"_id":"56d4b687c4bcb5681a870cb4"}]
Search the web, and saw some posts about the _id nog being a string type, and i should cast it to be a string. But i think it should be possible with ObjectId and it should be rather easy to query for it, but i lack good knowledge of mongoose and mongodb to get it working.
Any help would be appreciated!
Please try it as below, the {_id: "56d4b687c4bcb5681a870cb4"} in populate to match the ids in lessons array.
loc.findById(req.params.locationid)
.populate('lessons', null, {_id: "56d4b687c4bcb5681a870cb4"})
.exec(function (err, location) {
});
I am developing application using MEAN.js in which I have two documents as below:
var RingtoneSchema = new Schema({
language: {
label: String,
code : String
},
deliver:{
type:Boolean,
default:false
},
artists: [RingtoneArtist],
digital_booklet:{
title: {
type: String,
trim:true
},
copyright:{
type: String,
trim:true
}
}
title: {
type: String,
default: '',
required: 'Please fill Album title',
trim: true
},
created: {
type: Date,
default: Date.now
}
});
var AlbumSchema = new Schema({
language: {
label: String,
code : String
},
deliver:{
type:Boolean,
default:false
},
artists: [artist],
title: {
type: String,
default: '',
required: 'Please fill Album title',
trim: true
},
created: {
type: Date,
default: Date.now
});
I want to get all the records from both schema and order them by created date to display them in client side. I don't know how to do this using mongoose.
Any help will be appreciated.
Mongodb itself is not relational database and any kind of "join" operation is not possible. I see two ways to go:
Easy way, but not the best way:
If you, say, need to show 30 items on a page you need:
Load 30 items from Ringtone, load 30 items from AlbumSchema
Put them together in one array
Do final sort in memory.
Downside of this approach is you need to load more data into memory than needed and also perform in memory sort manually.
A better way. If you need to show data from two collections it can be a good sign to have one collection instead if two. Your two collections schema looks very similar. Later you can use sparse indexes to optimize queries which require only one of two entities.
Implementation details if you pick first way: you can load data from two queries in parallel using async or using promises and do final in memory sort using underscore
Hope this helps!