WEB-446: Validation of re-Age amount during submission with null value (#2876)

LGTM

src/app/loans/loans-view/loan-account-actions/loan-reaging/loan-reaging.component.html

@@ -70,10 +70,7 @@
               <input matInput formControlName="note" />
             </mat-form-field>
             <div class="flex-fill">
-              <span
-                class="expandcollapsebutton m-l-10 m-t-5 m-b-5 flex-75"
-                (click)="addTransactionAmount = !addTransactionAmount"
-              >
+              <span class="expandcollapsebutton m-l-10 m-t-5 m-b-5 flex-75" (click)="displayTransactionAmount()">
                 <mat-slide-toggle>
                   <div>
                     <span class="m-l-10">{{ 'labels.inputs.Transaction Amount' | translate }}</span>
@@ -87,7 +84,7 @@
                 [isRequired]="false"
                 [inputFormControl]="reagingLoanForm.controls.transactionAmount"
                 [inputLabel]="'Transaction Amount'"
-                [minVal]="0.01"
+                [minVal]="loanTransactionData.amount"
                 [maxVal]="loanTransactionData.amount"
               >
               </mifosx-input-amount>

src/app/loans/loans-view/loan-account-actions/loan-reaging/loan-reaging.component.ts

@@ -88,7 +88,10 @@ export class LoanReagingComponent implements OnInit {
       ],
       transactionAmount: [
         ,
-        [Validators.max(this.loanTransactionData.amount)]
+        [
+          Validators.min(this.loanTransactionData.amount),
+          Validators.max(this.loanTransactionData.amount)
+        ]
       ],
       note: '',
       externalId: '',
@@ -145,6 +148,13 @@ export class LoanReagingComponent implements OnInit {
     });
   }
 
+  displayTransactionAmount(): void {
+    this.addTransactionAmount = !this.addTransactionAmount;
+    this.reagingLoanForm.patchValue({
+      transactionAmount: null
+    });
+  }
+
   submit(): void {
     const data = this.prepareReagingData();
     if (data['transactionAmount'] === null) {