I am currently trying to simply insert a new row into my SQLite3 database on my iPad. I have done it multiple times before in other apps and just copied the code. The copied SELECT queries work fine, but if I try to INSERT, it fails at == SQLITE_DONE
This is how I try to insert into the database:
NSString *databaseName = #"Waypoints.sql";
NSArray *documentPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDir = [documentPaths objectAtIndex:0];
NSString *databasePath = [documentsDir stringByAppendingPathComponent:databaseName];
sqlite3 *database;
if(sqlite3_open([databasePath UTF8String], &database) == SQLITE_OK)
{
NSString *statement = [NSString stringWithFormat:
#"INSERT INTO Waypoints (id, name, alt, ias, temp, tas, wd, ws, gs, mt, mh, dist, time, fuel, fuelrate) VALUES (%d,'New...','','','','','','','','','','','','','');", [self numberOfWaypoints]];
NSLog(#"Statement: %#", statement);
const char *sqlStatement = [statement cStringUsingEncoding:NSASCIIStringEncoding];
sqlite3_stmt *compiledStatement;
if(sqlite3_prepare_v2(database, sqlStatement, -1, &compiledStatement, NULL) == SQLITE_OK)
{
if(sqlite3_step(compiledStatement) == SQLITE_DONE)
NSLog(#"DATABASE: Adding: Success");
else
NSLog(#"DATABASE: Adding: Failed");
}
else
NSLog(#"Error. Could not add Waypoint.");
sqlite3_finalize(compiledStatement);
}
sqlite3_close(database);
If I run this code on the press of a button, it outputs DATABASE: Adding: Failed in the console.
The NSLogged statement looks like this:
INSERT INTO Waypoints (id, name, alt, ias, temp, tas, wd, ws, gs, mt, mh, dist, time, fuel, fuelrate) VALUES (2,'New...','','','','','','','','','','','','','');
Which works perfectly fine if I paste it in the terminal (connected to same database file).
This brings me to the conclusion: what could be causing this problem?
I thought of maybe write permissions to the file. Could be it, but it's not in the bundle but already copied to the documents folder on the device.
Please help to how I can get this to work?
Try using NSUTF8StringEncoding for your cStringUsingEncoding or printing
NSLog(#"%#", [NSString stringWithUTF8String:(char*)sqlite3_errmsg(database)]);
Glad to see you could find your error with this.
By following the tip from #IgnacioInglese by printing out the error with NSLog(#"%#", [NSString stringWithUTF8String:(char*)sqlite3_errmsg(database)]); I found that the database is locked.
I found that I made a rookie-error by return a value in a method before closing the database. Fixing that solved my problem.
Related
I want the application which work online as well as offline example WhatsApp. For that i have to sync data from web service then store it in sqlite db file.
And I want that whoever installs this application would have a slot for automatic saving data in database file. Do I have to add db file from iTunes?
I don't want to use core data concept.
Is it possible it will be there in with application?
Like in Android there is something called cache memory where db file is stored so there is any sort of provision for it in ios?
+(int)insert_In_AdverImage:(NSString *)strid ImageName:(NSString *)strimg Isshow:(NSString *)strshow LastUpdateId:(NSString *)date isdelete:(NSString *)isdelete Sortorder:(int)sortOrder{
sqlite3 *database;
int retValue = 0;
if(sqlite3_open([databasePath UTF8String], &database) == SQLITE_OK) {
NSString *tempSQL = [[NSString alloc] initWithFormat:#"INSERT INTO ADVERIMAGE(advId ,advimg ,isshow ,LastUpdateId ,IsDelete ,SortorderId ) VALUES ('%#', '%#', '%#', '%#', '%#', '%d')", strid, strimg, strshow, date, isdelete, sortOrder];
const char *sqlStatement = [tempSQL cStringUsingEncoding:NSUTF8StringEncoding];
sqlite3_stmt *compiledStatement;
sqlite3_prepare_v2(database, sqlStatement, -1, &compiledStatement, NULL);
sqlite3_step(compiledStatement);
retValue = (int)sqlite3_last_insert_rowid(database);
sqlite3_finalize(compiledStatement);
}
sqlite3_close(database);
return retValue;
}
works well. But still the db file in app bundle is empty.i got it that whenever we insert something it will be inserted in document and if we have to see the inserted data we have to get it from document
Thanks in advance
Any Help would be appreciated.
Yes. Possible.
You can store SQlite DB in your applications's Document Directory. You need to write your own Query to Open DB, Insert Data, Retrieve Data from DB.
Check out following tutorial for your requirement : http://www.appcoda.com/sqlite-database-ios-app-tutorial/
Hope it helps.
Following function is used to Insert :
NSArray *docsDirectory = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *docPath = [docsDirectory objectAtIndex:0];
NSString *databasePath = [docPath stringByAppendingPathComponent:#"Database.sqlite"];
sqlite3 *dbHandler;
const char *dbPath = [databasePath UTF8String];
sqlite3_stmt *sqlStmt;
if(sqlite3_open(dbPath, &dbHandler) == SQLITE_OK)
{
if (sqlite3_prepare_v2(dbHandler, [queryString UTF8String], -1, &sqlStmt, NULL) == SQLITE_OK)
{
if (sqlite3_step(sqlStmt) == SQLITE_DONE)
{
NSLog(#"Data Inserted");
}
else
{
NSLog(#"Not inserted");
}
}
else
{
NSLog(#"Failed to Insert data -InsertDataFunc");
}
sqlite3_close(dbHandler);
}
I am making an iPhone app for a school project that reads and writes to a database. I have managed to get my code to write to it but it won't read. Below is the code I'm using to read:
NSString * paths=[self getWritableDBPath];
const char *dbpath = [paths UTF8String];
sqlite3_stmt *statement;
static sqlite3 *database = nil;
if (sqlite3_open(dbpath, &database) == SQLITE_OK)
{
NSString *querySQL = [NSString stringWithFormat: #"SELECT questionright, totalquestions, FROM results", nil];
const char *query_stmt = [querySQL UTF8String];
if (sqlite3_prepare_v2(database, query_stmt, -1, &statement, NULL) == SQLITE_OK)
{
while(sqlite3_step(statement) == SQLITE_ROW)
{
//code...
}
sqlite3_finalize(statement);
}
sqlite3_close(database);
}
Here is getWritableDBPath:
-(NSString *) getWritableDBPath {
NSString *myDB = #"appData.db";
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory , NSUserDomainMask, YES);
NSString *documentsDir = [paths objectAtIndex:0];
return [documentsDir stringByAppendingPathComponent:myDB];
}
The reason it doesn't work is that the sqlite3_prepare_v2 if statement is never satisfied.
When I write to the database I copy it to documents.
I am quite sure the results table exists as I am able to write to it. Here is the original sql statement:
DROP TABLE IF EXISTS "Questions";
CREATE TABLE "Questions" ("QuestionID" INTEGER PRIMARY KEY NOT NULL , "Question" TEXT, "RightAnswer" TEXT, "WrongAnswer1" TEXT, "WrongAnswer2" TEXT, "Done" BOOL, "Catagory" TEXT, "Audio" INTEGER);
DROP TABLE IF EXISTS "Results";
CREATE TABLE "Results" ("ResultID" INTEGER PRIMARY KEY NOT NULL , "QuestionRight" INTEGER, "TotalQuestions" INTEGER, "Catagory" TEXT);
I did find a similar question on here but didn't think the answers were that relevant to me.
Thanks for your help.
If you want my advice, don't use the sqlite c libraries directly if you don't really need that, you can use FMDB library and get rid of all the c headache
https://github.com/ccgus/fmdb
You can simply do it like this
FMDatabase *db = [FMDatabase databaseWithPath:#"your full db path in documents goes here"];
if (![db open]) {
return;
}
FMResultSet *s = [db executeQuery:#"Your query goes here"];
if ([s next]) {
int totalCount = [s intForColumn:#"totalCount"];
}
I want to update a row in my iPhone app. Below is the code. It shows in my log that query is executed and row has been updated, but when I excess that table, it seems to be empty. And also it always updates a row even if I am trying to enter a row with new id, it should insert instead of updating in this case.
//create local database
NSString *docsDir = NULL;
NSArray *dirPaths = NULL;
sqlite3 *localDB = NULL;
// Get the documents directory
dirPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
docsDir = [dirPaths objectAtIndex:0];
// Build the path to the database file
NSString *databasePath = [[NSString alloc] initWithString: [docsDir stringByAppendingPathComponent: #"localscentsy1.db"]];
NSLog(#"%#",databasePath);
const char *dbpath = [databasePath UTF8String];
sqlite3_stmt *statement = NULL;
if (sqlite3_open(dbpath, &localDB) == SQLITE_OK)
{
NSString *updateSQL = [NSString stringWithFormat:#"UPDATE Ratings set rating = '%d' WHERE perfume_id = ?",
(int)rating];
const char *update_stmt = [updateSQL UTF8String];
if(sqlite3_prepare_v2(localDB, update_stmt, -1, &statement, NULL ) ==SQLITE_OK){
sqlite3_bind_int(statement, 1, tappedItem.perfumeId);
}
char* errmsg;
sqlite3_exec(localDB, "COMMIT", NULL, NULL, &errmsg);
if(SQLITE_DONE != sqlite3_step(statement)){
NSLog(#"Error while updating. %s", sqlite3_errmsg(localDB));
NSLog(#"query failed: %s", sqlite3_errmsg(localDB));
NSLog(#"%#",#"update unsuccessfull");
NSLog(#"New data, Insert Please");
sqlite3_stmt *statement2 = NULL;
NSString *insertSQL = [NSString stringWithFormat:
#"INSERT INTO Ratings (perfume_id,rating) VALUES (\"%d\",\"%d\")",
tappedItem.perfumeId,
(int)rating];
const char *insert_stmt = [insertSQL UTF8String];
sqlite3_prepare_v2(localDB, insert_stmt, -1, &statement2, NULL);
if (sqlite3_step(statement2) == SQLITE_DONE)
{
NSLog(#"New data, Inserted");
}
sqlite3_finalize(statement2);
}
else{
NSLog(#"%#",#"update successfull");
sqlite3_finalize(statement);
}
sqlite3_close(localDB);
}
Any help will be appreciated. I am new at ios development and this code is taking so much of my time. Here is my log which always says "update successful"
CyberGenies/Library/Application Support/iPhone Simulator/7.0/Applications/24D2FEE2- DBE6-441A-AC79-1F2D57F96C88/Documents/localscentsy1.db
2014-07-27 01:03:26.612 Scentsy Squirrel[19008:a0b] update successfull
Have you seen if the db really has the structure? Some times when you start doing queries in an empty db (I mean not even tables) the query itself build the structure you are giving it on the query. You can check by compiling on the simulator and look for the db in the Mac finder.
i have a UIWebView over a UIScrollView. i use some js files to draw some graph like line that will update when the time value changes.
The Problem
Im not able to scroll when the points goes out of the screen.
I'm new to IOS Development so please help me.
thank in advance
After Completion the QUERY, You need to close transaction.
Here's the sample code for you...
// Get the documents directory
dirPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
docsDir = [dirPaths objectAtIndex:0];
// Build the path to the database file
databasePath = [[NSString alloc] initWithString: [docsDir stringByAppendingPathComponent: #"YOURDB.db"]];
const char *dbpath = [databasePath UTF8String];
if (sqlite3_open(dbpath, &DB) == SQLITE_OK)
{
NSString *query=[NSString stringWithFormat:#"insert into studentDetails (NAME,Email,adressL1,adressL2,phone,landline,department,DoB,fatherName) values (\"%#\",\"%#\",\"%#\",\"%#\",\"%#\",\"%#\",\"%#\",\"%#\",\"%#\")",
name.text,
email.text,
addressLine1.text,
addressLine2.text,
phone.text,
Landline.text,
Department.text,
DoB.text,
fname.text];
const char *insert_stmt = [insertSQL UTF8String];
sqlite3_prepare_v2(YOURDB, insert_stmt, -1, &statement, NULL);
if (sqlite3_step(statement) == SQLITE_DONE)
{
NSLog(#" Successfully added");
} else {
NSLog(#" Failed added");
NSLog(#"Error %s",sqlite3_errmsg(ExplorejaipurDB));
}
}
sqlite3_finalize(statement);
sqlite3_close(YOURDB);
}
The database could be locked because of several reasons:
Multiple queries running
multiple threads running
opened the database multiple times
Check your code and see if you have closed the connections to the database sqlite3_close(). A good idea would also be to use sqlite3_finalize() after each SQL statement when you are done with it.
So try try to match all your sqlite3_open() with sqlite3_close() and sqlite3_prepare() (if you are using it) with sqlite3_finalize()
I working on an app that takes input from a text field and puts it into a string. I have a table with a field in it that I want to check the value of the string from the input against the value in the field in the database. I'm new to iOS and fairly new to SQLite.
Code:
-(IBAction)setInput:(id)sender
{
NSString *strStoreNumber;
NSString *strRegNumber;
strStoreNumber = StoreNumber.text;
strRegNumber = RegNumber.text;
lblStoreNumber.text = strStoreNumber;
lblRegNumber.text = strRegNumber;
NSArray* paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString* documentsDirectory = [paths lastObject];
// NSString* databasePath = [documentsDirectory stringByAppendingPathComponent:#"tblStore.sqlite"];
NSString* databasePath = [[NSBundle mainBundle] pathForResource:#"tblStore" ofType:#"sqlite"];
if(sqlite3_open([databasePath UTF8String], &database) == SQLITE_OK)
{
NSLog(#"Opened sqlite database at %#", databasePath);
//...stuff
}
else
{
NSLog(#"Failed to open database at %# with error %s", databasePath, sqlite3_errmsg(database));
sqlite3_close (database);
}
NSString *querystring;
// create your statement
querystring = [NSString stringWithFormat:#"SELECT strStore FROM tblStore WHERE strStore = %#;", strStoreNumber];
const char *sql = [querystring UTF8String];
NSString *szStore = nil;
NSString *szReg = nil;
if (sqlite3_prepare_v2(database, sql, -1, &databasePath, NULL)!=SQLITE_OK) //queryString = Statement
{
NSLog(#"sql problem occured with: %s", sql);
NSLog(#"%s", sqlite3_errmsg(database));
}
else
{
// you could handle multiple rows here
while (sqlite3_step(databasePath) == SQLITE_ROW) // queryString = statement
{
szStore = [NSString stringWithUTF8String:(char*)sqlite3_column_text(databasePath, 0)];
szReg = [NSString stringWithUTF8String:(char*)sqlite3_column_text(databasePath, 1)];
} // while
}
sqlite3_finalize(databasePath);
// Do something with data...
}
It gets to the line "NSLog(#"Opened sqlite database at %#", databasePath);", so it appears as though it has access to the database. However, when I run the app, I get the "NSLog(#"sql problem occured with: %s", sql);" error, which I can see in the console. Additionally, in the console, it says "No such table: tblStore".
I created the table using the Firefox add-on SQLite Manager. I added the sqlite3 library to the project. I dragged and dropped the database table I created in SQLite manager into my project, above my two AppDelegate files and my two ViewController files.
Any help or input would be greatly appreciated. Thanks!
EDIT: I have properly added the file to the project, and it appears as though the table is found now. Now I have some strange warnings, though:
"Incompatible pointer types passing 'const char *' to parameter of type 'sqlite3_stmt *' (aka 'struct sqlite3_stmt *')"
This warning appears on the following lines of code:
if (sqlite3_prepare_v2(database, sql, -1, &databasePath, NULL)!=SQLITE_OK)
while (sqlite3_step(sql) == SQLITE_ROW)
szStore = [NSString stringWithUTF8String:(char*)sqlite3_column_text(sql, 0)];
szReg = [NSString stringWithUTF8String:(char*)sqlite3_column_text(sql, 1)];
sqlite3_finalize(sql);
It's got something to do with "sql", but I'm unsure of what. Any suggestions?
Your code seems ok - did you copy the db to the ressource folder of your project?
EDIT
Make sure you access your db file with something like that:
- (void) initializeDB {
// Get the database from the application bundle
NSString* path = [[NSBundle mainBundle] pathForResource:#"tblStore" ofType:#"sqlite"];
if (sqlite3_open([path UTF8String], &database) == SQLITE_OK)
{
NSLog(#"Opening Database");
}
else
{
// Call close to properly clean up
sqlite3_close(database);
NSAssert1(0, #"Error: failed to open database: '%s'.",
sqlite3_errmsg(database));
}
}
The database file you add to the project will be embedded in the main NSBundle (see [NSBundle mainBundle]).
In order to do what you want, you need to copy the database from the main bundle to the documents folder before trying to access it. Otherwise, as you are experiencing, you will not be able to find the SQLite DB on the document's folder.
You can copy your database, click finder and write this address(/Users/administrator/Library/Application Support/iPhone Simulator/6.1/Applications/) in finder click ok.
You will get documentary path.
Open your project document file and paste your database....