Angular2 Reactive Form Table - forms

Question

I am having some trouble looking up and attempting to do what I want to.
I have a table with inputs in each row, and I want each row which is created using an ngFor, to be considered a form group.
Within each form group I want a validation in that if any of the controls are filled within the row, that the entire form group needs to be filled before submission can be done.
Here is what I have so far in my template.
I don't have anything in the component yet as Angular.io and searching around for a few hours has not shown me anything close to what I want.
<form>
<table id="table" class="mdl-data-table mdl-js-data-table mdl-data-table mdl-shadow--2dp">
<thead>
<tr>
<th>Day</th>
<th>Description</th>
<th>Open Time</th>
<th>Close Time</th>
</tr>
</thead>
<tbody>
<tr *ngFor="let scheduleDetail of scheduleDetails">
<td style="padding: 0 8px 0 8px;">{{weekdayConverter(scheduleDetail.dayId)}}</td>
<td class="pad-input">
<mdl-textfield style="max-width:100px;" type="text" class="font" name="description" [(ngModel)]="scheduleDetail.description"></mdl-textfield>
</td>
<td>
<mdl-textfield style="max-width:75px" type="text" error-msg="hh:mm" name="openTime" pattern="([01]\d|2[0-3]):?([0-5]\d)" [(ngModel)]="scheduleDetail.openTime"></mdl-textfield>
</td>
<td>
<mdl-textfield style="max-width:75px" type="text" error-msg="hh:mm" name="closeTime" pattern="([01]\d|2[0-3]):?([0-5]\d)" [(ngModel)]="scheduleDetail.closeTime"></mdl-textfield>
</td>
</tr>
</tbody>
</table>
</form>
Update
Added the following to the template:
Changed inputs to:
<mdl-textfield (keyup)="formChange(scheduleDetail)" style="max-width:100px;" type="text" class="font" name="description" [(ngModel)]="scheduleDetail.description"></mdl-textfield>
Added the following to the component:
formChange(detail:scheduleDetail){
if(this.checkValid(detail)==false)
this.scheduleDetails.filter(detail => detail == detail)[0].require=true;
else
this.scheduleDetails.filter(detail => detail == detail)[0].require=false;
this.checkForm();
}
checkValid(detail:scheduleDetail){
if(detail.description!=null && detail.description!=""){
if(this.checkTime(detail))
return true
else
return false
}
else
return true
}
checkTime(detail:scheduleDetail){
if(
(detail.openTime!=null && detail.closeTime!=null) &&
( detail.openTime!="" && detail.closeTime!="") &&
(this.checkRegExp(detail.openTime) && this.checkRegExp(detail.closeTime))
){
return true
}
else if((this.checkRegExp(detail.openTime) && this.checkRegExp(detail.closeTime))){
return true
}
else return false
}
checkRegExp(time:string){
let timeRegExp = /([01]\d|2[0-3]):?([0-5]\d)/;
if(timeRegExp.test(time)){
return true;
}
else
return false;
}
checkForm(){
let valid: boolean = true;
this.scheduleDetails.forEach(detail => {
if(detail.require==true){
valid = false;
}
});
this.scheduleDetails.forEach(detail => {
if(detail.description=="" || detail.description==null){
valid = false;
}
});
this.formValid = valid;
}

Answer 1

Model Driven Forms
You are using a template driven form, which is hard to scale, and maintain.
Here, i will guide you to migrate to a model driven form.
Component
export class WeekScheduleComponent {
// Our empty Form
myForm: FormGroup;
constructor(private fb: FormBuilder){
// We inject FormBuilder to our component
// Now, we instantiate myForm with FormBuilder
// Notice that myForm is a FormGroup which contains an empty FormArray
this.myForm = this.fb.group({
scheduleDetail: this.fb.array([])
})
}
addRow(){
// This function instantiates a FormGroup for each day
// and pushes it to our FormArray
// We get our FormArray
const control = <FormArray>this.myForm.controls['scheduleDetail'];
// instantiate a new day FormGroup;
newDayGroup: FormGroup = this.initItems();
// Add it to our formArray
control.push(newDayGroup);
}
initItems(): FormGroup{
// Here, we make the form for each day
return this.fb.group({
description: [null, Validators.required],
openTime: [null, Validators.required],
closeTime: [null, Validators.required]
});
}
submit(){
// do stuff and submit result
console.log(this.myForm.value);
}
}
in your template:
<form [formGroup]="myForm" *ngIf="myForm">
<table formArrayName="scheduleDetail">
<tr *ngFor="let item of myForm.controls.scheduleDetail.controls; let i=index"
[formGroupName]="i" >
<td><input type='text' formControlName="description"></td>
<td><input type='text' formControlName="openTime"></td>
<td><input type='text' formControlName="closeTime"></td>
</tr>
</table>
</form>
<button (click)="addRow()">Add new item</button>
<button (click)="submit()" [disabled]="!myForm.valid">Submit</button>

Answer 2

Component
import { Component, OnInit } from '#angular/core';
import {FormGroup, FormBuilder, FormControl, Validators, FormArray} from '#angular/forms';
#Component({
selector: 'app-sales',
templateUrl: './sales.component.html',
styleUrls: ['./sales.component.css']
})
export class SalesComponent implements OnInit {
myForm: FormGroup;
constructor(private fb: FormBuilder){
}
// getter to get a reference to scheduleDetail form array in myForm form group
get scheduleDetail():FormArray{
return <FormArray>this.myForm.get('scheduleDetail')
}
// add a new row, get reference to form array using getter method and push form group into it
addRow(){
this.scheduleDetail.push(this.initItems());
}
// make a form for each row!
initItems(): FormGroup{
return this.fb.group({
description: [null, Validators.required],
openTime: [null, Validators.required],
closeTime: [null, Validators.required]
});
}
submit(){
console.log(this.myForm.value)
}
ngOnInit() {
this.myForm = this.fb.group({
scheduleDetail: this.fb.array([this.initItems()])
})
}
}
Template
<form [formGroup]="myForm" *ngIf="myForm">
<table formArrayName="scheduleDetail">
<thead>
<tr>
<th >Desc</th>
<th >Open Time</th>
<th >Close Time</th>
</tr>
</thead>
<tbody>
<tr *ngFor="let item of myForm.controls.scheduleDetail.controls; let i=index"
[formGroupName]="i" >
<td><input type='text' formControlName="description"></td>
<td><input type='text' formControlName="openTime"></td>
<td><input type='text' formControlName="closeTime"></td>
</tr>
</tbody>
</table>
</form>
<button (click)="addRow()">Add new item</button>
<button (click)="submit()" [disabled]="!myForm.valid">Submit</button>