Angular: How to filter a dataTable using query params - css

Question

I want to filter my table using query params that I got from the user input in another component.
I am able to get the data that the users send through the input and print it to the console.log. But I don't know how to use it to filter the table.
i have built a filter but for some reason i cant call it.
This is my filter :
import { Pipe, PipeTransform } from "#angular/core";
import { Container } from "./Entites/Container";
#Pipe({
name: 'textFilter'
})
export class textFilter implements PipeTransform {
transform(
containers : Container[],
storageSearch?: any,
clientSearch?: string,
): Container[] {
if (!containers) return [];
if (!storageSearch) return containers;
storageSearch = storageSearch.toLocaleLowerCase();
containers = [...containers.filter(user => user.TAOR_QTSR_EBRI.toLocaleLowerCase() === storageSearch)];
if (!clientSearch) return containers;
clientSearch = clientSearch.toLocaleLowerCase();
containers = [...containers.filter(user => user.LQOCH_SHM_LEOZI_QTSR.toLocaleLowerCase() === clientSearch)];
// if (!roleSearch) return users;
//roleSearch = roleSearch.toLocaleLowerCase();
//users = [...users.filter(user => user.role.toLocaleLowerCase() === roleSearch)];
return containers;
}
}
This is my component ngOnInit i have some other filters there, for example checkbox filter :
ngOnInit() {
this.marinService.getAllContainers().subscribe((result) => {
//Data
this.dataSource = new MatTableDataSource(result);
//Paginator
this.dataSource.paginator = this.paginator;
//AutoFilter Form 1st page
this.clientType = this.route.snapshot.queryParamMap.get('clientType');
this.storageType= this.route.snapshot.queryParamMap.get('storageTypes');
console.log('The Client name is : '+this.clientType+' '+'The storage Facility is : '+this.storageType);
//CheckBox Filter
this.dataSource.filterPredicate = (data: Container, filter: any) => {
return filter.split(',').every((item: any) => data.SOG_MCOLH.indexOf(item) !== -1);
};
this.filterCheckboxes.subscribe((newFilterValue: any[]) => {
this.dataSource.filter = newFilterValue.join(',');
});
});
}
What I want to accomplish is to be able to filter the table using the query params.

Answer 1

We can pass the data which you have received as input (in the parent component) to the material table filtering function applyFilter inside the child component...
relevant parent TS:
import { Component } from '#angular/core';
#Component({
selector: 'app-root',
styles: [`.parent{background:lightgreen; padding:2%;}`],
template: `
Enter string for filtering: <input type='text' [(ngModel)]='inputStr' />
<!-- {{inputStr}} -->
<table-filtering-example [inputStr]='inputStr'>loading</table-filtering-example>
`,
})
export class AppComponent {
inputStr: string = '';
constructor() { }
}
relevant child TS:
export class TableFilteringExample implements OnInit, OnChanges {
displayedColumns: string[] = ['position', 'name', 'weight', 'symbol'];
dataSource = new MatTableDataSource(ELEMENT_DATA);
#Input() inputStr:string;
constructor(){}
ngOnInit(){}
ngOnChanges(){
/* just call the applyFilter button with the data which is passed to your component from it's parent */console.log("(ngOnChanges)this.inputStr:", this.inputStr);
this.applyFilter(this.inputStr);
}
applyFilter(filterValue: string) {
this.dataSource.filter = filterValue.trim().toLowerCase();
}
}
complete working stackblitz here