typescript - How to toggle column in ng2 data table/akveo in angular 4 -


i integrating ng2-data-table akveo project , have hit hiccup while toggling column visibility. followed issue https://github.com/akveo/ng2-smart-table/issues/95 set visibility flag column , on toggle update flag data doesn't update in table. point missing.

html

 <div class="row table-control">  <div class="col-md-6">  <input type="text" id="myinput" onkeyup="myfunction()" placeholder="search             names..">  </div>  <div class="col-md-3">   </div>  <div class="col-md-3">  <ss-multiselect-dropdown [options]="myoptions" [texts]="mytexts"   [settings]="mysettings" [(ngmodel)]="optionsmodel   (ngmodelchange)="toggle($event)">  </ss-multiselect-dropdown>          </div>  </div>   <div class="row">  <ng2-smart-table [settings]="settings" [source]="rows"></ng2-smart-table>  </div>

ts

rows: = []; optionsmodel: any[]; myoptions: imultiselectoption[];    settings = {  mode: 'external',  hidesubheader: true,  actions: {   add: false, edit: false, delete: false, columntitle: '', position: 'right'  },  columns: {   enquiry_no: { title: 'enquiry no', filter: false, show: true },    name: { title: 'name', filter: false, show: true },   };   constructor(private enquire: fetchenquirycampaignservice) {  this.enquire.getallenquiry().subscribe(data => {   this.rows = data;  })  }    toggle() {   var item = this.optionsmodel.pop();   console.log(item);   console.log(this.settings.columns[item].show);   this.settings.columns[item].show = !this.settings.columns[item].show;   console.log(this.settings.columns[item].show);   }

i have used angular-2-dropdown-multiselect retrieve id of selected cols, have used localdatasource refresh source on toggle() still no luck.

live example: https://ronit123321.github.io/procturv2/enquiry/manage

found actual source of problem settings object cannot updated.

so had dummy setting named "settingupdater" created , added attributes it. on toggle function update dummyobject , assign value actual setting.

toggle() { var item = this.optionsmodel.pop(); this.settingupdater.columns[item].show = !this.settings.columns[item].show; this.settings = object.assign({}, this.settingupdater); }

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