Can not delete realm object on NavigatorIOS right click action

Question

I am trying to add a single sign on feature in a react-native app. I am using realm for data persistence. It is working fine with sign in process and stores data when user is login in fist time. But I want to remove user object from local storage when I click on logout button in navigator top right corner.

I am getting an Invalid arguments exception when I try to delete user object from realm storage in onRightButtonPress event. Here is code for this event in NavigatorIOS.

<NavigatorIOS
    barTintColor="#000000"
    tintColor="#fff"
    titleTextColor="#fff"
    ref={(ref) => this._navigator = ref}
    style={{flex: 1,backgroundColor: '#fff'}}
    initialRoute={{
        title: 'NOOZOO',
        component: Home,
        leftButtonIcon: require('../images/menu.png'),
        onLeftButtonPress: () => { this._drawer.open() },
        rightButtonTitle: 'Logout',
        onRightButtonPress: () => {alert('Logout');
                                   console.log({name: global.__user.name,token: global.__user.token});
                                   var users = realm.objects('User');
                                   console.log(users.length);
                                   console.log(users[0].isValid());
                                   realm.write(()=>{
                                    realm.delete('User', users[0]);
                                  });
                                   console.log('deleted');
                                  this._navigate({'title':'Company','routeName':'Home','active':false,'iconUrl': require('../images/check.png'),'newView':false}); 

                                  console.log(users);
                                  },
    }}/>

I am printing some values to consoles in order to verify if realm is accessible and have some object in storage, which seems fine as in following image.

I don't know if I am doing something wrong with realm method call or something. I have seen the docs for realm and also read issue about it on github but was unable to resolve this issue. Any help would be appreciated.

score 1 · Accepted Answer · answered Jun 14 '16 at 00:32

1

The call do delete does not take the object type as its first argument. Try changing that line to this:

realm.delete(users[0]);

answered Jun 14 '16 at 00:32

Ari

1,439
10
7

this solution worked but I am wondering how realm automatically infer based on object without telling it about collection Class. – tmw Jun 14 '16 at 08:16
Since the object is created from Realm we can tell what type of object it is and delete it appropriately. – Ari Jun 15 '16 at 00:52
from your answer, we are not explicitly mentioning the object type is 'User'. – tmw Jun 15 '16 at 07:44
Exactly. That information is stored internally in each User object returned when accessing elements in the `Results` object `users` – Ari Jun 16 '16 at 20:29

Can not delete realm object on NavigatorIOS right click action

1 Answers1