Core data not updating
Also when the device is offline the offline-created objects aren't uploaded. By Tom Dykstra and Rick Anderson The Contoso University sample web application demonstrates how to create ASP.In a multiuser environment, there are two models for updating data in a database: optimistic concurrency, and pessimistic concurrency. Pessimistic concurrency involves locking rows at the data source to prevent users from modifying data in a way that affects other users.In a pessimistic model, when a user performs an action that causes a lock to be applied, other users cannot perform actions that would conflict with the lock until the lock owner releases it.
This is the second article for our Core Data series.Like saving data, we first grab the manage object context. If this is a context issue why are some of the object properties' changes being seen and other not?In the last tutorial, we already discussed how to fetch and save a managed object using Core Data API.
So how can you update or delete an existing managed object from database? To allow user to delete a record from the table view, as you know, we can simply implement the “can Edit Row At Index Path” and “commit Editing Style” methods.
The i OS delete methods don't remove the object from memory or the managed object context.