I install sqlite db manager on visual studio and create my database.
I added this db file to "app_data > myDB" (no ext.)
It works perfect on visual studio using debug mode.But when i publish this project to web , my data is getting from db perfectly also my update button is working and saying its done !
Unfourtunately when i refresh page come back my old data , its not changed.
I solved it ,You have to set permission on db folder also , sqlite version must be defined in your connection string : Like this :
data source=|path|\MYSQLITE_DB; Version=3;
Related
I created website using asp.net MVC with Entity Framework Code First. It worked before on Windows Azure, the site was available publicly.
For some reason, I deleted database that was used to store data of my webpage. I created new one, similar to previous one.
I properly connected my site to database (in solution I clicked "Publish", in "Settings" there is place to type data about database, in "Destination Connection String" window I typed all needed data and clicked "Test Connection" - everything seems to be fine)
I published my site, the site works correctly, but when I go to page that gets data from database is see this error:
Invalid object name 'dbo.AspNetUsers'.
In Visual Studio in "SQL Server Explorer" I can see what is in my database. In fact, there is nothing inside (there is one table: "__MigrationHistory" and as I suspect this is created by default).
How can I generate all those tables again? It should generate database structure automatically.
PS: Accidentally I deleted "migations" from my project, do you think this is the cause?
This is not my projects blame, it works OK on localhost on my computer, when I delete localDB, it generates new one without any problem.
Yes, you need migrations. But you can always re-create them (well, if you removed them all it will be initial migration containing all of your previous migrations).
To quick fix you can backup and restore you database on the server. And if you need to re-create migrations do the following:
Backup all your data
Delete the entire database (local and remote), delete all migrations from code.
Create databases (local and remote one).
Run "add-migration Initial" command from PM console
Run "update-database" from PM console.
Upload your code to the server again. If database is empty, new initial migration should be automatically applied.
I try to add core data's - with data already loaded - sqlite database to the project. I am running App on simulator, on device I get no problem. The goal to preload fresh launching app with data. In the document folder I have 3 database file:sqlite, sqlite-shm, sqlite-wal. I have chosen to copy to the project only the sqlite file. When I restarting App with preoloaded database, It seems that database is empty. Why? On device there would be only one database file, which would be not corrupted. Database connection was not closed on simulator, or what?
I found here the answer: How to preload data into an iOS app using sqlite files
In oder to get core data to behave in the old way (pre-iOS 7), and generate just the sqlite file, I had to add this argument to the addPersistentStoreWithType:configuration:URL:options:error: method call, in the options parameter. You can find it in AppDelegate.
#{ NSSQLitePragmasOption : #{ #"journal_mode" : #"DELETE" } }
I'm using Code First concept in Entity Framework and I'm constantly getting the following exception while starting application:
Cannot attach the file 'C:\Users\Admin\Documents\Visual Studio 2012\
Projects\Pro\Pro.Web\App_Data\Pro.mdf' as database 'Pro'.
I've put this in Global.asax.cs but also without success:
Database.SetInitializer(new DropCreateDatabaseIfModelChanges<ProWebContext>());
var ctx = new ProWebContext();
ctx.Database.Initialize(true);
I've checked under App_Data directory and there no database created. Also, under Server Explorer there is nothing under Data Connections. Everything was working fine yesterday and today not working at all. I've tried to connect to LocalDB with SQL Server Management studio but it says it cannot connect to local database. Any ideas what could be a problem?
Thanks!
I found the solution. With newest SQL Server Management studio there is no problem in connecting to the local database. Connection needs to be established like this:
After logging in we can still see old database present even if there is nothing under App_Data directory and under Data Connections in Server Explorer in Visual Studio. When we delete that database from SQL Server Management studio and start application again there will be no more errors while attaching database.
I was facing the same error when I saw this but I couldn't delete the database using SQL Server Management Studio so I remembered IDatabaseInitializer.
Setting a database initializer for my Code First context solved the issue. In my case adding an initializer to always drop the DB worked (I added the code in the static constructor of my context, most people add it in Global.asax):
static SomeDbContext()
{
System.Data.Entity.Database.SetInitializer(new DropCreateDatabaseAlways<SomeDbContext>());
}
There are other initializers of course.
I just got into the same problem, and yet the answers above helped, the solution was different.
In my case, I was reusing a project that has already created it´s database. And since the name in the config was the same, it was throwing the exception, missleading the real solution.
It worth checking the database is not created and is different than the ones you used before. Change the name and go ahead.
I deleted the mdf file manually so the code will recreate it again, and had the same problem. I solved it by running update-database command in the package manager console.
I use sqlite in my appharbor app. the data file was in "/App_Data". in my dev env,it works good .But when I deployment it in appharbor, there was a error :"SQLite error no such table: Items" . It seemed all the tables was lost.
and I print the connection string ,It was "Data Source=D:\websites\f3\d2b85\15729\0x0001_PublishedWebsites\ToolBox\App_Data\d3ah.db;" ,seemed fine.
so , what should I do?
I knew it.
the appharbor build my source code and deployment it.
so,in visual studio, go to solution Explorer and find your sqlite data file.
right click it and then click "properties", and then set Build Action To "Content".
check in source code. Done!
Using SQLite on AppHarbor is not recommended because instance storage is not persisted across deploys. There are more details in the FAQ.
I'm in need of some help in developing a desktop application with a pre-populated database. I have tried numerous ways to get this working including those mentioned on both Tidesdk's API here http://tidesdk.multipart.net/docs/user-dev/generated/#!/api/Ti.Database.DB and at Titanium Desktops old API here http://developer.appcelerator.com/apidoc/desktop/latest/Titanium.Database-module.
While the later (using Titanium not Ti) works in creating a database in the apps directory it does not install my pre-populated sqlite database which is located in the resources file of my app.
A couple of my attempts located below
var db = Titanium.Database.openFile('test_db.sqlite', 'test_db');
var db = Titanium.Database.openFile(Ti.Filesystem.getFile(
Ti.Filesystem.getApplicationDataDirectory(), 'test_db.sqlite'));
var db = Ti.Database.open('test_db');
As stated most of these manage to create a database with the name given but when trying to run something as simple as a db.execute(SELECT) of something I know would exist in my pre-populated db I receive an error stating
Exception executing: SELECT name, id FROM people ORDER BY name COLLATE NOCASE, Error was: SQL Statement invalid or database missing
I have searched high and low for something to answer this but everyone continues to refer to the aforementioned API's or to the Mobile API's Ti.database.install() which does not work either.
Is it possible with titanium desktop to use a pre-populated sqlite database or do I have to populate it after I create it? If so any direction would be helpful (where to place the .sqlite file in the app and what functions to call).
I am currently using Titanium Studio with a titanium desktop osx SDK of 1.2.0.RC4 as requested by tidesdk.org until they have released there open source sdk.
Thanks in advance
This is possible, I just used this feature in a recent desktop app, deployed it successfully to Windows and Mac.
In my experience, sometimes your database file can be corrupted, for example if you use the Titanium.Database.install command, and it cant find the file to preload from (maybe the first time you specified the path wrong for instance), it will create the file itself, any subsequent install commands will not work because it already thinks this database has been installed.
Have you tried clearing out the application data? This is where titanium installs the database. For Mac this is in your /User/Library/Application Support/APPNAME directory. Their is a directory for databases, delete this and try again.
Also, this answer on Titanium Q&A may help, it talks about the process with the Mobile SDK but the Database stuff is the same.
Hope this helps!