chartersetr.blogg.se

1. Sync for reddit save wiki offline how to#
2. Sync for reddit save wiki offline update#
3. Sync for reddit save wiki offline Offline#

So when posting your object to server at the time of syncing you will have to just check if any object with the UDID is already present and take appropriate action from there. The primary key on server uniquely identifies objects in that table while UUID uniquely identifies records across tables and databases. On the server end you can have both, an integer type auto incremented and indexed, primary key and a VARCHAR type to hold the UUIDs.

UUID guarantees uniqueness across systems in a distributed system and depending on what your language of implementation is you will have methods to generate UUIDs without any hassle.ĭesign your local database such that you can use UUIDs as primary key in your local database. For this you can safely rely on UUIDs for generating unique IDs for objects.

Sync for reddit save wiki offline Offline#

The problem with offline first systems in this approach is the possibility of conflict that you may face when posting new data or updating existing data.Īs a first measure to avoid conflicts from happening you will have to generate unique IDs for all objects from your clients and in such a way that they remain unique when posted on the server and saved in a data base. If you are using an RDBMS to backup all data:

Sync for reddit save wiki offline how to#

How to build offline-smart application with Hoodie.I've written something on how to use Hoodie, see links Below: In your TODO application, Hoodie will be a great fit. I've used pouchDB and couchbase/couchdb/IBM cloudant but I've done that through Hoodie It has user authentication out-of-the box, handles conflict management, and a few more. Demystifying Conflict Resolution in Couchbase Mobile.See the links below for more on Conflict Resolution. It's not so different from Couchbase too. It is up to you to dictate how the merging should be done in your application. It does not attempt to merge the conflicting revision. It determines which one it'll use as the latest revision, and save the others as the previous revision of that record. When the database synchronizes and there are conflicting changes, CouchDB will detect this and will flag the affected document with the special attribute "_conflicts":true. With PouchDB on the client, you can save data on the client and set it to automatically sync/replicate the data whenever the user is online. You could use PouchDB on the client and Couchbase or CouchDB on the server. Note that you'll have to handle conflict resolution on the server. This is just an example of how you could achieve it using Background Sync.

Sync for reddit save wiki offline update#

Since you're saving to IndexDB, you could register for a sync event when the user add, delete or update a TODO item function addTodo(todo) Even if the user navigates away or closes the browser, the action is performed and you could notify the user if desired. With this, it can defer actions until the user has a reliable connection, ensuring that whatever the user wants to send is actually sent. It enables web applications to synchronize data in the background. What patterns are in use to sync the pending requests with the REST-ful Server when the connection is back online?īackground Sync API will be suitable for this scenario.