Dexie.IncompatiblePromiseError

Inheritance Hierarchy

• Error
  • Dexie.DexieError
    • Dexie.IncompatiblePromiseError

Description

Happens when returning an incompatible Promise from a transaction scope.

Dexie.Promises are compatible with other Promises, but in transaction scopes you must use Dexie.Promise only. Outside transaction scopes, you are free to mix with other promises. The reason is that Dexie's transaction scope needs to do the following:

• Make sure indexedDB transactions aren't committed too early
• Keep track of currently ongoing transaction for the particular scope.
• Detect whether a promise was uncaught and if so, abort the transaction.

Solution:

db.transaction ('rw', db.friends, function() {
    // Always use Dexie.Promise in the scope:
    return Dexie.Promise.all ([  
        db.friends.put({name: "Foo"}),
        db.friends.put({name: "Bar"})
    ]);
});

Solution for async / await

import Dexie from 'dexie';
let Promise = Dexie.Promise; // Make async use Dexie.Promise everywhere in current module

function putFriends() {
    return db.transaction('rw', db.friends, async () => {
        await db.friends.put({name: "Foo"});
        await db.friends.put({name: "Bar"});
    });
});

...or just where you need it:

{
    let Promise = Dexie.Promise; // Make async use Dexie.Promise in this block only.
    db.transaction('rw', db.friends, async () => {
        await db.friends.put({name: "Foo"});
        await db.friends.put({name: "Bar"});
    });
}