sqlite database not updating modified data in iphone sdk - iphone

Question

Well i am new to iphone coding and using sqlite in one of my application the problem is my sqlite database does not updates the modified data, i am following a sqlite based tutorial:
this is what i am doing:-
- (void) saveAllData {
if(isDirty) {
if(updateStmt == nil) {
const char *sql = "update Work Set Engagement = ?, Status = ?, Where WorkID = ?";
if(sqlite3_prepare_v2(database, sql, -1, &updateStmt, NULL) != SQLITE_OK)
NSAssert1(0, #"Error while creating update statement. '%s'", sqlite3_errmsg(database));
}
sqlite3_bind_text(updateStmt, 1, [Engagement UTF8String], -1, SQLITE_TRANSIENT);
sqlite3_bind_text(updateStmt, 2, [Status UTF8String], -1, SQLITE_TRANSIENT);
//sqlite3_bind_double(updateStmt, 2, [Status doubleValue]);
sqlite3_bind_int(updateStmt, 3, WorkID);
//int Success = sqlit3_step(updateStmt);
if(SQLITE_DONE != sqlite3_step(updateStmt))
NSAssert1(0, #"Error while updating. '%s'", sqlite3_errmsg(database));
sqlite3_finalize(updateStmt);
isDirty = NO;
}
i am using :
- (IBAction) save_Clicked:(id)sender {
//Update the value.
//Invokes the set<key> method defined in the Work Class.
[objectToEdit setValue:txtField.text forKey:self.keyOfTheFieldToEdit];
[self.navigationController popViewControllerAnimated:YES];
}
for save button click and :
- (void) setEngagement:(NSString *)newValue {
self.isDirty = YES;
[Engagement release];
Engagement = [newValue copy];
}
- (void) setStatus:(NSString *)newNumber {
self.isDirty = YES;
[Status release];
Status = [newNumber copy];
}
for setting values, i banged my head thousand times and can not find what i am doing wrong can some body plz help me with this.....
this is the code for my getDBPath implementation
- (NSString *) getDBPath {
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory , NSUserDomainMask, YES);
NSString *documentsDir = [paths objectAtIndex:0];
return [documentsDir stringByAppendingPathComponent:#"CheckList.sqlite"];
}
this code for my Data Base :
- (void) copyDatabaseIfNeeded {
NSFileManager *fileManager = [NSFileManager defaultManager];
NSError *error;
NSString *dbPath = [self getDBPath];
BOOL success = [fileManager fileExistsAtPath:dbPath];
if(!success) {
NSString *defaultDBPath = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:#"CheckList.sqlite"];
success = [fileManager copyItemAtPath:defaultDBPath toPath:dbPath error:&error];
if (!success)
NSAssert1(0, #"Failed to create writable database file with message '%#'.", [error localizedDescription]);
}
}

Answer 1

Your code doesn't show opening the database, but I'm guessing you're opening one that is included in your app bundle? If so, you'll first need to copy the database into your app's Documents directory, because the application bundle is read-only.
You can get the path to the Documents directory with this:
[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0]