How to delete object with Id in Realm or Primary Key?

Question

I have below object :

obj1 = [{ id = 1, name = "abc"}, {id=2, name="pqr"}, {id=3, name="xyz"}]

I need to delete an object with id=2 where id is Primary Key too. Below method using to delete the object

 const collection = RealmDB.realm
      .objects("StudentName")
      .filtered(`id= $0`, '65');
    RealmDB.realm.write(() => {
      RealmDB.realm.delete(collection);
    });

But it is not working with id object can anyone please suggest better way to do this ?

But still that object is there so may I know what is wrong here.

It looks like you have a main object with a list of objects; are you trying to remove an object from the main objects list or totally remove the object completely? — Jay, Jun 22 '21 at 15:28

score 0 · Answer 1 · answered Jun 22 '21 at 14:36

0

const id = 1;
realm.write(()=>{
   realm.delete(realm.objectForPrimaryKey('Baby',id));
})

Try this.

answered Jun 22 '21 at 14:36

gwl002

654
4
10

score 0 · Answer 2 · answered Jun 22 '21 at 17:13

0

Hello resolved an issue by following query with no error

const collection = RealmDB.realm
          .objects('StudentName')
          .filtered('id= $0', `65`);
        RealmDB.realm.write(() => {
          RealmDB.realm.delete(collection);

Thank you

answered Jun 22 '21 at 17:13

Swift

829
2
12
33

You don't need to filter for an object that has a primary key. It can be [directly read](https://docs.mongodb.com/realm/sdk/react-native/examples/read-and-write-data/#read-operations); like this `const student = realm.objectForPrimaryKey("StudentName", $0);` – Jay Jun 22 '21 at 17:23
what is $0 and what about if wanted to filter for 65 id – Swift Jun 23 '21 at 16:25
Hmmm `$0` is from your code -> `.filtered('id= $0', `65`);` and is typically a placeholder. Either way - that's the code you need, just use `65` if that's the primary key value of the object you want to update. – Jay Jun 23 '21 at 18:43

How to delete object with Id in Realm or Primary Key?

2 Answers2