I'm new i flutter. I'm developing an offline money management app. I used hive as local database of my app for storing data locally. I have one important question: if I release new update after publishing my app in the app store,
what happens for hive local database in flutter after update? Does my users will lost their registered data or not?
Updating the app does not change or delete it's data on a device.
However, you are responsible to ensure the new version of the app can read and update the database successfully if you add or remove fields, type, tables, etc.
The is best ensured by suitable test cases that can be run before each release.
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I am porting an Android app for BlackBerry and during tests I see my saved user data (properties and a list of activities) disapearing each time I upload my newly build BAR to the device.
Will this happen on every update of the app?
On Android, my local data stays permanently on uploading and installing new versions.
I do not want to use shared storage for this data to avoid too many permissions, since the user won't understand why I need this shared storage (user could wonder about if I want to steal his other data).
This seems to be an issue of the Android VM version used at that specific time. In the meantime, the behaviour is as one would expect it, and all user data stays even after app update.
I've got an app that I'd like to send to beta testers using TestFlight.
We won't be changing the Core Data model, but I'm curious about two things:
When I send out an updated beta, is there any risk that the Core Data will be corrupted with the update?
When the app goes to the App Store, will our beta testers have to start fresh from the App Store version, or will their Core Data still appear in the App Store version?
The user's data is stored in their own documents directory. If you haven't changed the scheme (or if you have and you have a proper migration set up) then just updating the app will not affect their own data - unless they delete and install the application again.
If you haven't changed the bundle identifier - and they don't delete and re-install their app - the data will still exist in the Document directory.
I wanted to know that if i have installed an application in my iPhone and it has a database attached with that which is saved into the particular app folder in iPhone. Now from my application i am updating the database with adding more records and filling up the database fields.
Now my app has a newer version available. I updated my iphone app. Now does it remove all the database records and create the a new empty database ?? or my all my app personal data will remain there as untouched when app has been updated to newer version.
please guide me friends
Thanks
Well that all depends, all the data in the app bundle will be replaced, If you placed your data in the document directory it will be unaffected.
i am new in programming and have some troubles with backup.
I have an App with SQLite database and different user params in it. All data will be saved, after I leave application. But if I reinstall it, all data is lost.
So, i think i need some kind of backup for this data. I mean is there any way, how to save SQLite db outside of apps folder?
Updating the application will not overwrite your data, but deleting the app will remove all data. You don't need to delete the application each time you redeploy to your device or simulator.
Your application doesn't have access to anything outside of it's sandbox, so saving outside the apps folder is out of the question.
Basically when I have an application in XCode and I change the sqlite/coredata database and try to run it on a device that already has the application on it then the app crashes. I have to remove the app and reinstall it.
I have updated the database on an app that has already been submitted to the app store. There has been about 100 downloads, and now I want to submit the update. Will people who have already downloaded it have problems with it? How would I make sure that they don't? There won't be any data in the old database that I will need to be honest, but I'm worried that the app just won't start at all.
Thanks
Tom
From your description I can tell that you've changed the Managed Object Model withtout changing the store version.
Check out this tutorial (may be Mac version, but it should be valid) here.
However, if you with to omit the migration (since you said users won't exactly have any data in the store) you can always change the store path so that it loads another store. However, if you plan any updates and further developement of the app then i strongly recomend to read about core data migration.
Yes the app will probably crash when running with old db.
Apple released an interesting documentation about Core Data versioning and migration called: Core Data Model Versioning and Data Migration Programming Guide
If you read this document, you will learn how to avoid the crashes with updated coredata databases.