Cannot insert data into sqlite3 database using iOS - iphone

Question

Using MacOS Terminal I created a database name database.sql and inserted some records. Using iOS I can retrive the inserted values.
But using iOS code I tried to insert the record to the database and it does not enter the record in the database.
Should I set the need to set some permission? This is my code:
- (void)viewDidLoad
{
[super viewDidLoad];
[self openDB];
}
-(IBAction)save:(id)sender{
[self insertRecordIntoTableNamed:#"Contacts"
field1Value:fname.text
field2Value:lname.text
field3Value:comp.text
field4Value:email.text
field5Value:pnumber.text
field6Value:mnumber.text
field7Value:add.text
field8Value:city.text
field9Value:state.text];
}
-(void)openDB{
NSString *sqlfile=[[NSBundle mainBundle]pathForResource:#"database" ofType:#"sql"];
if(sqlite3_open([sqlfile UTF8String], &db)!= SQLITE_OK){
sqlite3_close(db);
NSLog(#"Database connected");
NSAssert(0,#"Database failed to open");
}
else
{
NSLog(#"Database connected");
}
}
-(void) insertRecordIntoTableNamed:(NSString *) tableName
field1Value:(NSString *) field1Value
field2Value:(NSString *) field2Value
field3Value:(NSString *) field3Value
field4Value:(NSString *) field4Value
field5Value:(NSString *) field5Value
field6Value:(NSString *) field6Value
field7Value:(NSString *) field7Value
field8Value:(NSString *) field8Value
field9Value:(NSString *) field9Value {
NSString *sql = [NSString stringWithFormat:#"INSERT INTO %# VALUES ('%#','%#','%#','%#',%#,%#,'%#','%#','%#');",tableName, field1Value, field2Value,field3Value,field4Value,field5Value,field6Value,field7Value ,field8Value,field9Value];
NSLog(#"%#",sql);
// char *err;
sqlite3_stmt *statement;
if (sqlite3_prepare_v2(db, [sql UTF8String], -1, &statement, nil)== SQLITE_OK)
{
if (SQLITE_DONE!=sqlite3_step(statement))
{
sqlite3_close(db);
NSAssert(0, #"Error updating table.");
}
else{
NSLog(#"Success");
NSLog(#"%#",sql);
}
}
sqlite3_finalize(statement);
}
#end
Here is what i have done:
change the folder and path permissions using CHMOD
split the sqlite3_exec() into sqlite3_prepare(), sqlite3_step() and sqlite3_finalize() - I get the same output - query is created but record is not created in database
I am able to retrieve record information

Answer 1

You can't write to a database in the resource bundle. You need to copy it and then use it.
Here's some code I've successfully used to do that (key is ensureDatabasePrepared where it is copied from resources):
- (BOOL)ensureDatabaseOpen: (NSError **)error
{
// already created db connection
if (_contactDb != nil)
{
return YES;
}
NSLog(#">> ContactManager::ensureDatabaseOpen");
if (![self ensureDatabasePrepared:error])
{
return NO;
}
const char *dbpath = [_dbPath UTF8String];
if (sqlite3_open(dbpath, &_contactDb) != SQLITE_OK &&
error != nil)
{
*error = [[[NSError alloc] initWithDomain:#"ContactsManager" code:1000 userInfo:nil] autorelease];
return NO;
}
NSLog(#"opened");
return YES;
}
- (BOOL)ensureDatabasePrepared: (NSError **)error
{
// already prepared
if ((_dbPath != nil) &&
([[NSFileManager defaultManager] fileExistsAtPath:_dbPath]))
{
return YES;
}
// db in main bundle - cant edit. copy to library if !exist
NSString *dbTemplatePath = [[NSBundle mainBundle] pathForResource:#"contacts" ofType:#"db"];
NSLog(#"%#", dbTemplatePath);
NSString *libraryPath = [NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, NSUserDomainMask, YES) lastObject];
_dbPath = [libraryPath stringByAppendingPathComponent:#"contacts.db"];
NSLog(#"dbPath: %#", _dbPath);
// copy db from template to library
if (![[NSFileManager defaultManager] fileExistsAtPath:_dbPath])
{
NSLog(#"db not exists");
NSError *error = nil;
if (![[NSFileManager defaultManager] copyItemAtPath:dbTemplatePath toPath:_dbPath error:&error])
{
return NO;
}
NSLog(#"copied");
}
return YES;
}

Answer 2

If you are interacting with the database only from the code you posted - you are missing a sqlite3_close. Most likely the changes are not getting flushed onto disk