Hi I am wondering which is the best solution to work with related resources in ember-data.
In order to build a REST backend.
1) embedded resources
user: {
id: "foo",
albums: [
album: {
id: "foo",
name: "bar",
description: "foobar",
},
album: {
id: "foobar"
name: "foobarfoo",
description: "fumanchu",
},
],
}
2) embedded id of the resources
user: {
id: "foo",
albums: [
album: {
id: "foo",
},
album: {
id: "foobar"
},
],
}
3) linked resources
user: {
id: "blabla",
links: {
"self": { "href": "/users/blabla" },
"albums": { "href": "/albums/blabla" }
},
}
Do you think is possible to use hipermedia as in HATEOAS?
Thanks in advance
Did you have a look at ActiveModelSerializers gem?
It is the easier way to get the job done when working with Rails on the server side.
For relations, it may embed or use references to sub-resources. References (which I would recommend) are serialized this way:
{
users: [{
id: 42,
firstName: "John",
albums: [ 1, 2, 3 ]
}]
}
{
albums: [{
id: 1,
name: "Foo"
}, {
id: 2,
name: "Bar"
}, {
id: 3,
name: "Buzz"
}]
}
Here, albums may also be included as sideloaded data in the first hash:
{
users: [{
id: 42,
firstName: "John",
albums: [ 1, 2, 3 ]
}],
albums: [{
id: 1,
name: "Foo"
...
}]
}
Related
First of all, I am using Algolia JavaScript API Client V3 (Deprecated)
I have the following records
{
category: SEDAN,
manufacturer: Volkswagen,
id: '123'
},
{
category: COUPE,
manufacturer: Renault,
id: '234'
},
{
category: SEDAN,
manufacturer: Fiat,
id: '345'
},
{
category: COUPE,
manufacturer: Peugeot,
id: '456'
},
{
category: SUV,
manufacturer: Volkswagen,
id: '567'
}
I want to query Algolia and get something similar to the following json
{
categories: {
SEDAN: {
count: 2
items: [{
Volkswagen: {
count 1,
items: [{
id: '123'
}]
}
},
{
Fiat: {
count 1,
items: [{
id: '345'
}]
}
}]
},
COUPE: {
count: 2
items: [{
Renault: {
count 1,
items: [{
id: '234'
}]
}
},
{
Peugeot: {
count 1,
items: [{
id: '456'
}]
}
}]
},
SUV: {
count: 1,
items: [{
Volkswagen: {
count 1,
items: [{
id: '567'
}]
}
}]
}
}
}
I have been trying to query Algolia
index
.search({
query: '',
facets: ['category', 'manufacturer'],
attributesToRetrieve: []
})
.then((result) => {
console.log(result.facets);
});
But I am not sure if it is possible to combine the facets
facets added to a query doesn't work that way. It will simply return the record count for each facet value, not the actual records (https://www.algolia.com/doc/api-reference/api-parameters/facets/)
You can create filters around facets and use those to display results by facet value, but there isn't a way to build a single response JSON that is already grouped by facets like you show above. https://www.algolia.com/doc/api-reference/api-parameters/filters/
I have 3 collections in mongodb generated by strapi.io, I want customize query populate data by mongoose in my project. But i cannot populate data like strapi result.
Category collection:
{
_id: "5d10a731c5077836540bebf0",
posts: [
"5d10a6fbc5077836540bebed",
"5d10af45c5077836540bebf1"
],
name: "Support",
ids: "support",
keywords: "support",
des: "support des",
createdAt: "2019-06-24T10:34:25.383Z",
updatedAt: "2019-06-24T11:08:53.475Z",
__v: 0,
id: "5d10a731c5077836540bebf0"
}
Post collection:
{
_id: "5d10af45c5077836540bebf1",
ids: "test",
title: "this is test",
des: "test",
keywords: "test",
body: "testtesttesttesttest",
createdAt: "2019-06-24T11:08:53.467Z",
updatedAt: "2019-06-24T11:08:53.477Z",
__v: 0,
id: "5d10af45c5077836540bebf1"
}
FileUpload collection:
{
_id: "5d10af45c5077836540bebf2",
name: "THUMBNAIL.png",
sha256: "0bP9PI3R_ygF07cLhg5U-syLeVCz4ZbBrwZZi2OtPL4",
hash: "9f4e8bbd13b94f2baa3d26b335124717",
ext: ".png",
mime: "image/png",
size: "297.33",
url: "/uploads/9f4e8bbd13b94f2baa3d26b335124717.png",
provider: "local",
related:
[
{
_id: "5d10af45c5077836540bebf3",
ref: "5d10af45c5077836540bebf1",
kind: "Post",
field: "pic"
}
],
createdAt: "2019-06-24T11:08:53.501Z",
updatedAt: "2019-06-24T11:08:53.505Z",
__v: 0,
id: "5d10af45c5077836540bebf2"
}
I can populate "posts" on Category model with
Cat.find().populate({path: 'posts',model: 'Post'})
But I can not populate "categories" and "pic" on Post model.
How can I populate "categories" and "pic" like this result of strapi:
{
_id: "5d10af45c5077836540bebf1",
ids: "test",
title: "this is test",
des: "test",
keywords: "test",
body: "testtesttesttesttest",
createdAt: "2019-06-24T11:08:53.467Z",
updatedAt: "2019-06-24T11:08:53.477Z",
__v: 0,
id: "5d10af45c5077836540bebf1",
pic: {
_id: "5d10af45c5077836540bebf2",
name: "THUMBNAIL.png",
sha256: "0bP9PI3R_ygF07cLhg5U-syLeVCz4ZbBrwZZi2OtPL4",
hash: "9f4e8bbd13b94f2baa3d26b335124717",
ext: ".png",
mime: "image/png",
size: "297.33",
url: "/uploads/9f4e8bbd13b94f2baa3d26b335124717.png",
provider: "local",
related: [
"5d10af45c5077836540bebf1"
],
createdAt: "2019-06-24T11:08:53.501Z",
updatedAt: "2019-06-24T11:08:53.505Z",
__v: 0,
id: "5d10af45c5077836540bebf2"
},
categories:
[
{
posts: [
"5d10a6fbc5077836540bebed",
"5d10af45c5077836540bebf1"
],
_id: "5d10a731c5077836540bebf0",
name: "Support",
ids: "support",
keywords: "support",
des: "support des",
createdAt: "2019-06-24T10:34:25.383Z",
updatedAt: "2019-06-24T11:08:53.475Z",
__v: 0,
id: "5d10a731c5077836540bebf0"
}
]
}
you have to create another collection inside the post. as like you have an independent collection then you can populate. for example :
Post: {body: ,title: ,Image : { image: {name : , etc }}}
this can be a collection inside collection. the above code is not correct you have to mention your own fields.
After populating data i get result not as expected.
Example:
//User.js Model
module.exports = {
attributes: {
//"id" attribute is here primary key by default
schools: { collection: 'School', via: 'id' },
name: { type: 'String', trim: true, required: true }
}
}
And this is my School.js
//School.js Model
module.exports = {
attributes: {
//"id" attribute is here primary key by default
name: { type: 'String', trim: true, required: true },
}
}
My User entity data looks like this:
//User document in MongoDB
{
_id: 1,
name: "Foo",
schools: [1,2,3]
}
My School entity data looks like this:
//School documents in MongoDB
{
_id: 1,
name: "School 1"
}
{
_id: 2,
name: "School 2"
}
{
_id: 3,
name: "School 3"
}
Now i want to populate the schools. I do it like this:
User.find().populate("schools").exec(function(err, res){ console.log(res[0]) });
And this is what i get as a result:
{
schools: [Getter/Setter],
name: "Foo",
id: 1
}
Expected:
{
schools: [
{id: 1, name: "School 1"},
{id: 2, name: "School 2"},
{id: 3, name: "School 3"}
],
name: "Foo",
id: 1
}
How can i get expected results?
I use MongoDB as data storage.
Versions:
Sails.js: v0.10.0-rc5
Waterline: v0.10.0-rc7
sails-mongo: 0.10.0-rc2
Those are the expected results when using console.log! If you want to see the expanded object, do:
console.log(res[0].toObject());
If we have several books,each books contains several chapters and each chapter contains several pages.
In an App,
when user navigate to
"/home"
list all the books,clicking a book(eg:book_1) will directly "linkTo"
"/book_1/chapter_1/page_1"
show the content of "chapter_1/page_1" within the selected book.
I am now trying to use the "redirect" hook,but I am confused with these:
1,How to sent muti params to a redirect hook;
2,How to update the URL correctly after redirecting?
3,What is the "Ember way" to do this?
_BOOK MODEL__
App.Book = DS.Model.extend({
name: DS.attr('string'),
chapters: DS.hasMany('chapter',{async:true}),
color: DS.attr('')
});
App.Chapter = DS.Model.extend({
name: DS.attr('string'),
author: DS.attr(''),
pages: DS.hasMany('page',{async:true})
});
App.Page = DS.Model.extend({
name: DS.attr('string'),
});
App.Book.FIXTURES = [
{
id: 1,
name: 'book1',
color: 'red',
chapters: [1,2]
},
{
id: 2,
name: 'book2',
color: 'blue',
chapters: [3,4]
}
];
App.Chapter.FIXTURES = [
{
id: 1,
name: 'Chapter1',
author: 'jhon',
pages:[1,2]
},
{
id: 2,
name: 'Chapter2',
author: 'jhon',
pages:[3,4]
},
{
id: 3,
name: 'Chapter3',
author: 'peter',
pages:[5,6]
},
{
id: 4,
name: 'Chapter4',
author: 'tom',
pages:[7,8]
}
];
App.Page.FIXTURES = [
{
id: 1,
name: 'page1',
},
{
id: 2,
name: 'page2',
},
{
id: 3,
name: 'page3',
},
{
id: 4,
name: 'page4',
},
{
id: 5,
name: 'page5',
},
{
id: 6,
name: 'page6',
},
{
id: 7,
name: 'page7',
},
{
id: 8,
name: 'page8',
}
];
redirect is deprecated, use the afterModel hook. I'm sending in ids of 1 and 1 to the chapter and page route, which should hit their model hooks. How is your data separated, does the book model have all the necessary info?
http://emberjs.jsbin.com/uDiLIkij/6/edit
afterModel: function(model, transition){
console.log(transition.targetName);
if(transition.targetName=='book.index'){
var self = this;
model.get('chapters').then(function(chs){
var ch = chs.get('firstObject');
ch.get('pages').then(function(pages){
var page = pages.get('firstObject');
self.transitionTo('page', model, ch, page);
});
});
transition.abort();
}
},
I have following documents in my collection
{
_id: ObjectId("5166fefbc482c31052000002"),
contact: [
{
home: 7735734105
},
{
office: 9583866301
}
],
user_name: "moti",
reportsTo: "bikram",
technology: [
{
name: ".net",
rating: 5
},
{
name: "JavaScript",
rating: 2
}
],
project: [
"Agile School",
"Draftmate"
],
type: "developer",
email: "motiranjan.pradhan#ajatus.co.in"
}
and
{
_id: ObjectId("5166fe90c482c31052000001"),
contact: [
{
home: 7735734103
},
{
office: 9583866901
}
],
user_name: "ganesh",
reportsTo: "bikram",
technology: [
{
name: "JavaScript",
rating: 3
},
{
name: ".net",
rating: 4
}
],
project: [
"SLBC",
"Draftmate"
],
type: "developer",
email: "ganesh.patra#ajatus.co.in"
}
Now I need to find the rating of the people who know only JavaScript.Currently if I run
db.users.find(
{
technology: {
$elemMatch: {
name: 'JavaScript'
}
}
},{user_name:1,'technology.name':1,_id:0}
).pretty()
I am getting names of all technologies(.net & JavaScript) and their corresponding ratings. I need only user names,and their respective ratings in JavaScript only. Do I need to use any aggregation techniques?
The positional operator '$' can be used to limit query results to the first matching element. To use in your query above you would change it to:
db.users.find( { technology: { $elemMatch: { name: 'JavaScript' } } },{user_name:1,'technology.$.name':1,_id:0} )