Core data not updating


01-May-2016 17:11

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.

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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.



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