A simple question for everyone I think. I just begin to work with database for the Iphone.
And so I create my database "external.sql" and I import it into Xcode.
I create a simple Navigation Base application and I try to display all from module_category but its not working, told me that the table does not exist.
So I try to display in the console all tables inside my database, but it return me nothing
I have this:
2009-11-30 18:52:00.845 CategoryList[18458:20b] Display all tables in the database : ()
2009-11-30 18:52:00.859 CategoryList[18458:20b] *** Terminating app due to uncaught exception, reason: 'failed to execute statement: 'SELECT * FROM module_category' with message: no such table: module_category'
Is there something special to do when importing a database into the project? Did I have to create an Object for all my tables before being able to display them?
Thank you,
P.S: I have possibility to send the test project if you don't understand.
I'm assuming here that you're using sqlite3. If so, it looks like the database file is not present on the iPhone at the path you're using to open it.
Check that the database file is being copied to the bundle by looking inside the .app bundle. To put the file in the bundle, add it to the Copy Bundle Resources build phase in Xcode.
Check that the database file is not corrupt. Use sqlite3 [path to the file inside the bundle] to test your queries from the command line.
Check that you are using the correct path to open the database. Put a breakpoint on the line where you call sqlite3_open and check that the file really is at that path.
Related
We are using Optimizely/Episerver CMS 11.20. When trying to export a page hierarchy from our production environment and then import the resulting ExportedFile.episerverdata file to our acceptance test environment I get the following error:
[Importing content 70725_133679] Exception: Object reference not set to an instance of an object.
I have no idea what 70725_133679 is referring to. Is there a way to look this up, e.g. via an SQL query against the "EPi" database?
It refers to a specific version of some content (which could be just about anything).
You could try to browse to https://yoursite/EPiServer/CMS/#context=epi.cms.contentdata:///70725_133679 (note the ID at the end) to see which content it is.
Got another answer on a Optimizely forum (thanks to Surjit Bharath):
The following SQL against the EPi database gives information about the referenced content:
select * from tblContent where pkID = 70725
select * from tblWorkContent where pkID = 133679
This too points to a submit button. I have yet to understand why that block would cause an exception during import, but now I at least have a place to start digging.
I'm trying to create my own language definition, and use it for highlighting the syntax in my app.
The issue I have is that, when trying to access the language definition from my app's data folder (/usr/share/myapp/), even using the c.lang file copied from /usr/share/gtksourceview-3.0/language-specs/, just to test, I get this error at runtime:
GtkSourceView-WARNING **: Failed to load '/usr/share/myapp/c.lang': could not find the RelaxNG schema file
So it's asking for some schema file? So I went forward and copied every file from the language-specs folder that isn't a lang file, which includes: language.dtd, language.rng and language2.rng.
Now, when I run again, I get these errors:
GtkSourceView-WARNING **: in file /usr/share/com.github.aleksandar-stefanovic.urmsimulator/c.lang: style 'def:comment' not defined
GtkSourceView-WARNING **: Failed to load '/usr/share/com.github.aleksandar-stefanovic.urmsimulator/c.lang': unable to resolve language 'def'
What does that even mean? Is that something namespace-related? It is very peculiar, because the exact same file is working perfectly when in gtksourceview folder.
Any clues? Do these "RelaxNG" files work only in their original directories? If so, how can I change that? I've looked into the files, but failed to find any reference to their original folder...
This is the source-code (in Vala) related to the issue:
var manager = Gtk.SourceLanguageManager.get_default ();
string search_paths[] = {"/usr/share/myapp", null};
manager.set_search_path (search_paths);
var buffer = new Gtk.SourceBuffer.with_language (manager.get_language ("c"));
The application does in fact find the language "c", I've checked by debugging.
You have to preserve the Gtk.SourceLanguageManager's original search path when you add your own. Append to it instead of replacing it.
In Xamarin IOS solution, the standard code for sqlite database path is:
var sqliteFilename = "MyDatabase.db3";
string libraryPath = Path.Combine (documentsPath, "..", "Library"); // Library folder instead
var path = Path.Combine (libraryPath, sqliteFilename);
The above code is fine if the database is created from scratch.
but my question is how should I include the existing sqlite database into the solution, so it can be copied over to "Library" folder?
Include your database as a file in your solution, marking it as "Build Action -> Content". In your code, you can access it relative to the root of your project (ie, "/mydb.db3") - then read it and copy it to your Library or wherever you want to place it.
Keep in mind that files bundled into your application are READ-ONLY. You will have to copy the db to a writable path before you can write to it.
While using tAccessInput component in my job, it showing error like,
It may not be a database that your application recognizes, or the file may be corrupt.
But, it all the connections and database/table names are valid in my job.
What can be the problem. and how can i resolve it.
Metioning the exact DBVersion is more important for tAccessInput/tAccessOutput.
Like Access 2003/Access 2007 and associated database file name.
I have 'inherited' a test harness application which uses Enterprise Library for its SQL data access. In the app.config file (enterpriselibrary.configurationSettings), it references a "configurationSection" with a path to "dataConfig.config", which is encrypted. I would like to change the database connection properties, but EntLibConfig.exe will not open the dataConfig.config or app.config (I have the FileKeyAlgorithmPairStorageProviderData file).
The test harness application runs, so its configured ok.
I can, in code, using (Microsoft.Practices.EnterpriseLibrary.Data.Configuration.ConfigurationManager.GetConfiguration("dataConfiguration")) read the data configuration, and can navigate all the instances and connection strings (security isn't an issue for this test harness). I can dump everything I need to a hand-crafted XML file (using GetType().AssemblyQualifiedName to get the full name for the classes which read the config file) and then change the app.config to read my new, unencrypted, xml dataConfig file.
All is fine, I can now change my database config settings.
However... given that ConfigurationManager.GetConfiguration("dataConfiguration") returns a fully populated instance of a DatabaseSettings object, is there not a method I can call which will write the XML file (dataConfig.config) for me ?
I appreciate that this is probably a really big hammer way to edit the data configuration, but after half a day of trying, I fell back on the old coding maxim... if you can't find the tool to do what you want, write your own !
Thanks
Well... turns out that its not that hard.
I added a new "configurationSection" to my app.config (dataConfiguration2), with encrypt set to false, with a path pointing to an new empty text file (dataConfiguration.config2). I then copied my encrypted dataConfiguration details using the following code:
using Entlib = Microsoft.Practices.EnterpriseLibrary.Configuration;
using Microsoft.Practices.EnterpriseLibrary.Data.Configuration;
:
DatabaseSettings settings = (DatabaseSettings)Entlib.ConfigurationManager.GetConfiguration("dataConfiguration");
Entlib.ConfigurationManager.WriteConfiguration("dataConfiguration2", settings);
...and it filled the empty file with the (unencrypted) configuration details.