My object has a specific set of key / value pairs,
i want to get a specific value, not everything, how can i do this?
For example:
.ts
movie = {
title:'title',
description:'descriprtion',
rating:4
};
html:
<ul *ngFor="let item of movie | keyvalue">
<li> {{item.value}} </li>
</ul>
And I only want to receive item.description, can you tell me how this can be implemented?
<ul *ngFor="let item of movie | keyvalue">
<ng-container *ngIf="item.key === 'description'">
<li>{{item.value}}</li>
</ng-container>
</ul>
But to be honest you would be better off just doing:
<div>{{ move.description }}</div>
Since you do not seem to want to iterate the object props, but only want description.
Related
I have a list like this
<ul>
<li *ngFor="let product of items.Products| slice 0:3 ; let i = index">
{{ product?.ProductsDescription}}
<li>
</ul>
All i want i to is, display a list of products, but i wan't to limit the exibition to only 3 products, and below, in another <li></li> display "And more {{ quantity-left-of-products }}"
Example:
I Have 6 products, so it would display:
Item 1
Item 2
Item 3
And more 3
Something like this:
In my knowledge i would have to find a way to access the index property outside the ngFor.
Can anyone help me?
You can achieve what you want without accessing the index value outside the context.
Create a variable in TS to use it as a parameter in the slice pipe.
sliceValue = 3;
loadMore() {
this.sliceValue = items.Products.length;
}
Template:
<ul>
<li *ngFor="let product of items.Products| slice 0:sliceValue ; let i = index">
{{ product?.ProductsDescription}}
<li>
<li (click)="loadMore()" *ngIf="items.Products.length > sliceValue">And more {{items.Products.length - sliceValue}}</li>
</ul>
Use *ngIf for displaying the "And More" when necessary. When the user clicks on "And More" the <li> for "And More: hides and the rest of the list loads.
I'm receiving JSON data from an API which has some child objects as well. The API has a menu level and down the menu, it's having meals. What I want to do is to display meals relating to each menu under the menu
JSON from API
[{"id":6,"name":"Menu 1","serveDate":"2019-05-10","meals":[{"id":13,"name":"Rice with Stew","description":"rice","image":"","mealType":"BREAKFAST","unitPrice":5,"status":"ENABLED"}]},{"id":5,"name":"Menu 2","serveDate":"2019-06-10","meals":[{"id":13,"name":"Corn Flakes,"description":"Flakes","image":"","mealType":"BREAKFAST","unitPrice":5,"status":"ENABLED"}]},{"id":4,"name":"Menu 3","serveDate":"2019-07-10","meals":[]}]
HTML
<div *ngFor="let item of menuList">
<h2>Menu</h2>
{{item.name}} - {{item.servate}}
<h2 *ngFor="let item of menuList.meals">Meals</h2>
{{item.name}} - {{item.mealType}}
</div>
JS
getMenus() {
this.menuServices.menuList(this.pagedData)
.subscribe(
response => {
if (response && response.code === HttpStatus.OK) {
this.menuList = response.data;
}
},
);
}
Any help on how to make this work correctly the way it should work?
<div *ngFor="let menu of menuList">
<h2>Menu</h2>
{{menu.name}} - {{menu.servate}}
<h2>Meals</h2>
<ng-container *ngFor="let meal of menu.meals">
{{meal.name}} - {{meal.mealType}}
</ng-container>
</div>
Using this way you don't have to add unnecessary divs or any other html tag for looping in angular.
this is the perfect way to do nested loops without changing your html
No need to access the main list as you have your meals array in the item object.
Change HTML Code to:
<div *ngFor="let item of menuList">
<h2>Menu</h2>
{{item.name}} - {{item.servate}}
<h2>Meals</h2>
<div *ngFor="let item of item.meals">
{{item.name}} - {{item.mealType}}
</div>
</div>
When you're doing something like let item of menuList that means the item variable should be used to refer to an individual item within your loop. To avoid confusion, I'd also recommend naming these item vars for nested loops differently.
Another important thing to keep in mind that all the markup that you want to be output for each array item should be wrapped with an element with *ngFor. It's not the case with your <h2> tag being printed for each meal, but not the meal description.
Edit the template as follows:
<div *ngFor="let menuItem of menuList">
<h1>Menu</h1>
<h2>{{menuItem.name}} - {{menuItem.serveDate}}</h2>
<p>maybe description here</p>
<h3>Meals</h2>
<p *ngFor="let mealItem of menuItem.meals">{{mealItem.name}} - {{mealItem.mealType}}</p>
</div>
I have this object:
this.item = {
name:"Michael",
age:18
};
I want to put on HTML
name: Michael
age: 18
<div >{{ item (name) }}</div> --??? should put name
<div>{{ item.name }}</div>
<div ">{{item (age)}}</div> --?? should put age
<div>{{ item.age}}</div>
How can I get the string name and age from the object?
Use keyValue pipe
<div *ngFor="let item of item | keyvalue">
{{item.key}}:{{item.value}}
</div>
stackblitz
You should avoid calling a function (which some suggest in comments) inside template. If you do that, that function will be called every time change detection runs. Which is bad. Almost always prefer pipes over method call inside the template.
You can try something like:
<div *ngFor="let key of item">
<div>{{key}}: {{item[key]}}</div>
</div>
So I have an array that I need to display, problem is the array can't be populated until the page is already displayed and the user has entered a value
Stepping through my code I can see that the array is being populated correctly, however, the view isnt updated
I'm able to update it using this and an on click event
onAddClick(){ this.CarTypes.push(newAddCar("1",true,true,1,1,"1","1"))
}
But when I call it through a method, it doesn't update, even though the parameters are 100% correct
add(NMsg:string, Nom: boolean, show: boolean,image: number, order: number, id: string, name:string){
this.CarTypes.push(newAddCar(NMsg,Nom,show,image,order,id,name))
}
Can anyone help?
<div>
<!--<ul *ngFor="let cars of CarTypes" (click)="Click(cars)">
{{ cars.CarTypes.length ? cars.CarTypes[0].Name : '' }}
</ul>-->
<ul>
<li *ngFor="let cars of CarTypes" >
{{cars.Name}}
</li>
<button (click)="onAddClick()">Add</button>
</ul>
<!--<select name="selectedcar" [(ngModel)]="selectedcar" ng-repeat="car as car.Name in CarTypes">{{cars}}</select>-->
</div>
I can access my desired field from a JSON object like so:
<li ng-repeat='customer in customers[0][data]["DisplayName"] | filter:search'>{{ customer }}</li>
However, that only returns one object's property.
Using AngularJS, is there a way to loop through the following?
customers[0][data]["DisplayName"]
customers[1][data]["DisplayName"]
customers[2][data]["DisplayName"]
customers[3][data]["DisplayName"]
customers[4][data]["DisplayName"]
...
customers is an array, so by doing ng-repeat you will already loop through it. But I think what you want is either: 1) show the DisplayName property inside <li> or 2) filter by DisplayName.
To show the nested property, do the following
<li ng-repeat="customer in customers">
{{ customer[data]["DisplayName"] }}
</li>
To filter on nested property, for example on DisplayName:
<li ng-repeat="customer in customers | filter:{data: {DisplayName: search}}">
...
</li>