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iPhone: Sqlite update or insert row



I want to update the quantity if the menuid is already available otherwise add a new row. I used the following code.But no row is added or updated.







sqlite3 *database;

sqlite3_stmt *addStmt=nil;

if (selection== nil) {

selection =@"Medium";

}

if (sqlite3_open([dbPath UTF8String], &database) == SQLITE_OK) {



const char *select="select quantity from item where menuid = ?";

sqlite3_stmt *selectstmt;

if(sqlite3_prepare_v2(database, select, -1, &selectstmt, NULL) == SQLITE_OK) {



while(sqlite3_step(selectstmt) == SQLITE_ROW) {

menuID= [NSString stringWithUTF8String:(char *)sqlite3_column_text(selectstmt, 0)];

char *quant = (char *)sqlite3_column_text(selectstmt,1);

quantity=[NSString stringWithUTF8String:(char *)quant];

// [self.ids addObject:menuID];



}

sqlite3_reset(selectstmt);

}

NSString *quant=[NSString stringWithFormat:@"%@",quantity];





if (quant == @"") {

if (addStmt == nil) {

// const char *sql = "delete from item";

const char *sql = "insert into item(menuid,itemName,price,quantity,spiciness) Values( ?, ?, ?, ?,?)";



if(sqlite3_prepare_v2(database, sql, -1, &addStmt, NULL) != SQLITE_OK)

NSAssert1(0, @"Error while creating add statement. '%s'", sqlite3_errmsg(database));

}

// NSLog(@"ADDSTMT:%@",addStmt);

sqlite3_bind_int(addStmt, 1, [itemId integerValue]);

sqlite3_bind_text(addStmt, 2, [name UTF8String], -1, SQLITE_TRANSIENT);

sqlite3_bind_double(addStmt, 3, [priceItem doubleValue] );

sqlite3_bind_int(addStmt, 4, number);

sqlite3_bind_text(addStmt, 5, [selection UTF8String],-1,SQLITE_TRANSIENT);

NSLog(@"Name:%@",name);

NSLog(@"MENU IDe%@",priceItem);



if(SQLITE_DONE != sqlite3_step(addStmt)){

// NSAssert1(0, @"Error while inserting data. '%s'", sqlite3_errmsg(database));

}

else

//SQLite provides a method to get the last primary key inserted by using sqlite3_last_insert_rowid



menuID = [NSDecimalNumber numberWithLongLong:sqlite3_last_insert_rowid(database)];



//Reset the add statement.

sqlite3_reset(addStmt);



}





else{

if (addStmt == nil) {

// const char *sql = "delete from item";

const char *sql = "update item set quantity= ? where menuid = ?";



if(sqlite3_prepare_v2(database, sql, -1, &addStmt, NULL) != SQLITE_OK)

NSAssert1(0, @"Error while creating add statement. '%s'", sqlite3_errmsg(database));

}

// NSLog(@"ADDSTMT:%@",addStmt);

sqlite3_bind_int(addStmt, 2, [itemId integerValue]);

number=number+[quant intValue];

sqlite3_bind_int(addStmt, 1, number);



NSLog(@"Name:%@",name);

NSLog(@"MENU IDe%@",priceItem);



if(SQLITE_DONE != sqlite3_step(addStmt)){

// NSAssert1(0, @"Error while inserting data. '%s'", sqlite3_errmsg(database));

}

else

//SQLite provides a method to get the last primary key inserted by using sqlite3_last_insert_rowid



menuID = [NSDecimalNumber numberWithLongLong:sqlite3_last_insert_rowid(database)];



//Reset the add statement.

sqlite3_reset(addStmt);







sqlite3_close(database);



}

}




Comments

  1. I might be just lacking proper understanding of your code but it doesn't look like you're beginning and then committing a transaction in there. I might be way off base though as I've never inserted a row without using a transaction.

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