Angular 2 Load data through server API : data.slice error - angularjs

Question

Im trying to load the data from my API to custom component using Angular2 ng Smart table plugin.
AS per their documentation (https://github.com/akveo/ng2-smart-table/blob/master/src/app/pages/examples/server/basic-example-load.component.ts)
i have my component like:
import { LocalDataSource } from 'ng2-smart-table';
import { ProductService } from '../../../services/product.service';
export class CategoryItemsComponent implements OnInit {
...
source: LocalDataSource;
constructor(private productService: ProductService,
private flashMessage: FlashMessagesService,
private router: Router,
http: Http) {
this.source = new LocalDataSource();
this.productService.getProductsOncategory(this.categoryid).subscribe((data) => {
this.source.load(data);
});
}
ProductService .ts
getProductsOncategory(category_id) {
let catUrl = "http://localhost:5000/products/getProductsOncategory"
let headers = new Headers();
headers.append('Content-Type', 'application/json');
let catIdObj = JSON.stringify({ category_id: category_id })
return this.http.post(catUrl, catIdObj, { headers: headers })
.map((response: Response) => response.json())
.do(data => console.log(JSON.stringify(data)))
.catch(this.handleError);
}
The above API used in the service function works perfect in my postman.
Now i need to load the dame data from that API into my custom component.
I am getting this error:
ERROR TypeError: this.data.slice is not a function
at LocalDataSource.webpackJsonp.../../../../ng2-smart-table/lib/data-source/local/local.data-source.js.LocalDataSource.getElements (http://localhost:4200/1.chunk.js:22280:30)
at LocalDataSource.webpackJsonp.../../../../ng2-smart-table/lib/data-source/data-source.js.DataSource.emitOnChanged (http://localhost:4200/1.chunk.js:22185:14)
at LocalDataSource.webpackJsonp.../../../../ng2-smart-table/lib/data-source/data-source.js.DataSource.load (http://localhost:4200/1.chunk.js:22105:14)
at LocalDataSource.webpackJsonp.../../../../ng2-smart-table/lib/data-source/local/local.data-source.js.LocalDataSource.load (http://localhost:4200/1.chunk.js:22243:38)

Answer 1

Ok i got it by using like:
source: LocalDataSource;
constructor(private productService: ProductService,
private flashMessage: FlashMessagesService,
private router: Router,
http: Http)
{
this.source = new LocalDataSource();
}
onChange(categoryid) {
this.productService.getProductsOncategory(categoryid).subscribe(data => {
if (data.success) {
this.source.load(data.products);
console.log('Products obtained');
} else {
console.log('Not obtained!');
}
});
}

Answer 2

Had the same problem. It solved when i check all match columns and add the missing in table data. For example i delared a variable
Settings = {
....
columns: {
id: {
title: 'id',
show: false,
type: 'string',
},
name: {
title: 'name',
type: 'string',
},
//compare columns in json response in same variable declaration
//for your data table [source]
}
}
And in second case your table try get data from dataTableSource before full data loading, to avoid this use setTimeout(); method and set more time.
For Example:
getChildData(): Promise<any> {
return new Promise((resolve, reject) => {
setTimeout(() => {
resolve(this.childsList);
}, 4000);//<= increase this value
});
}
excuse me for my english))