如何从ng2-smart-table和源数据文件中删除特定行

Question

我将ng2-smart-table用作项目表。表格中有一个删除选项。我们可以临时删除数据。但是，如果我们再次刷新页面以加载数据，则会删除之前的内容。我想从表以及源数据列表中删除此数据。那我该怎么办。我在manufacture组件中使用了此表。我已将此列表连接到Firebase。我可以从firebase中添加和检索数据，但是无法删除和更新，但方法正确，那我该怎么办。

manufacture.component.ts

import { Component, OnInit } from '@angular/core';
import { ManufactureService } from './manufacture.service';
import { Manufacture } from './manufacture.model';

@Component({
selector: 'ngx-manufacture',
styles: [],
template: `
    <ng2-smart-table
    (createConfirm)="addData($event)"
    (deleteConfirm)="deleteData($event)"
    [settings]="settings"
    [source]="manu"
    >
    </ng2-smart-table>
`
})
export class ManufactureComponent implements OnInit {
    manu: Manufacture[] = [];

    constructor(private service: ManufactureService) {}

    ngOnInit() {
        this.service.getManufacture().subscribe(arr => {
        let manu_list = arr.payload.get('manufact');
        if (manu_list) {
            this.manu = manu_list;
        }
        });
    }

    settings = {
        add: {
        addButtonContent: '<i class="nb-plus"></i>',
        createButtonContent: '<i class="nb-checkmark"></i>',
        cancelButtonContent: '<i class="nb-close"></i>',
        confirmCreate: true
        },
        edit: {
        editButtonContent: '<i class="nb-edit"></i>',
        saveButtonContent: '<i class="nb-checkmark"></i>',
        cancelButtonContent: '<i class="nb-close"></i>'
        },
        delete: {
        deleteButtonContent: '<i class="nb-trash"></i>',
        confirmDelete: true
        },
        columns: {
        shopname: {
            title: 'Shop Name'
        },
        ownername: {
            title: 'Owner Name'
        },
        nic: {
            title: 'NIC'
        },
        contactno: {
            title: 'ContactNo'
        },
        address: {
            title: 'Address'
        },
        email: {
            title: 'Email'
        }
        }
    };

    addData(data) {
        this.manu.push(data.newData);
        console.log(this.manu);
        this.service.addManufacture({ manufact: this.manu }).subscribe(next => {
        data.confirm.reject();
        });
    }

    deleteData(event) {
        if (window.confirm('Are you sure you want to Delete?')) {
        event.confirm.resolve(event.newData);
        } else {
        event.confirm.reject();
        }
    }
}

manufacture.model.ts

 export class Manufacture {

    shopname : string;
    ownername: string;
    nic      : string;
    contactno: string;
    address  : string;
    email    : string;

}

manufacture.service.ts

import { Injectable } from '@angular/core';
import { Manufacture } from './manufacture.model';
import { AngularFirestore } from '@angular/fire/firestore';
import { from } from 'rxjs';

@Injectable({
providedIn: 'root'
})
export class ManufactureService {
    manufacture: Manufacture;

    constructor(private firestore: AngularFirestore) {}

    addManufacture(object) {
        return from(
        this.firestore
            .collection('Manufacture')
            .doc('manufacture')
            .set(object)
        );
    }

    getManufacture() {
        return this.firestore
        .collection('Manufacture')
        .doc('manufacture')
        .snapshotChanges();
    }

    deleteManufacture() {
        this.firestore
        .collection('Manufacture')
        .doc('manufacture')
        .delete();
    }

}