CODEWITHSUNDEEP
angulardart
matth3o
matth3o

Reputation: 3719

dart angular2 - null error when rendering an object in template

I'd like to write in my template something like : 

 <span>{{myObject.myField}}</span>

However myObject is initialized in my ngOnInit, and my object seems to still be null when the page is rendered because I have the following error 

NullError: method not found: 'myField' on null

If I only put in my template 

 <span>{{myObject}}</span>

I can see the value of myObject.

Is there a way to initialize my object before OnInit ? Is there another way to display my data ?

Thanks for your help.

Upvotes: 2

Views: 100

Answers (1)

G&#252;nter Z&#246;chbauer
G&#252;nter Z&#246;chbauer

Reputation: 658007

You can use the safe-navigation operator

<span>{{myObject?.myField}}</span>

to prevent errors while the model is not yet fully initialized

Alternatively you can wrap the elements with *ngIf to prevent them being rendered when the model is not yet initialized

<span *ngIf="myObject != null">{{myObject.myField}}</span>

This way you can cover bigger blocks or the whole template with a single *ngIf instead of adding ? everywhere.

Upvotes: 2

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