Realm and react Native Enable Updating Objects With Primary Keys for Nested Objects - react-native

Question

How Can I Enable Update objects with Primary Key Globally
For the first instance I create the realm object and pass true for update with primary key, it works for root level object but the child objects throw an error on the second run
Error: Attempting to create an object of type 'Category' with an existing primary key value
Is there a way to set update via primary key globally
This is my structure
class Response extends Realm.Object {}
Response.schema = {
name: 'Response',
primaryKey: 'id',
properties: {
id:'int', // primary key
categories: {type: 'list', objectType: 'CategoryList'},
}
};
class CategoryList extends Realm.Object {}
CategoryList.schema = {
name: 'CategoryList',
properties: {
category: {type: 'Category'},
}
};
Category extends Realm.Object {}
Category.schema = {
primaryKey:'categoryId',
name: 'Category',
properties: {
categoryId:'string',
name:'string',
itemsCount:'int',
createdDate:'string'
}
};
And this is how I persist to the db
let Response = realm.objects('Response');
let CategoryList = realm.objects('CategoryList');
realm.write(()=>{
realm.create('Response', {id:1,name: 'Response',categories: CategoryList},true);
let Categories = Response[0].categories;
for (let i=0;i<responseData.categories.length;i++){
Categories.push(responseData.categories[i]);
}
});

Answer 1

My guess would be you are getting this error from this line:
Categories.push(responseData.categories[i]);
push implicitly tries to create a new category rather than updating/reusing existing categories. Try changing this to:
Categories.push(realm.create('Catetory', responseData.categories[i], true));
This will reuse existing categories if they exist, or create them if they don't.