UNIQUE constraint failed: sqlite database : android

I am trying to insert values in table. But there is only one value inserted. I am getting an error in log cat when I am trying to insert new values.

Log cat shows :

abort at 13 in [INSERT INTO event(totalminutesfrom,dayofweek,title,location,totalminutesto,id) VALUES (?,?,?,?,?,?)]: UNIQUE constraint failed: event.id
01-24 11:34:39.764 7763-7763/com.example.siddhi.timetablelayout E/SQLiteDatabase: Error inserting totalminutesfrom=694 dayofweek=null title=qxs location=Eded & Mariz totalminutesto=0 id=0
01-24 11:34:39.764 7763-7763/com.example.siddhi.timetablelayout E/SQLiteDatabase: android.database.sqlite.SQLiteConstraintException: UNIQUE constraint failed: event.id (code 1555)
01-24 11:34:39.764 7763-7763/com.example.siddhi.timetablelayout E/SQLiteDatabase: at android.database.sqlite.SQLiteConnection.nativeExecuteForLastInsertedRowId(Native Method)
01-24 11:34:39.764 7763-7763/com.example.siddhi.timetablelayout E/SQLiteDatabase: at android.database.sqlite.SQLiteConnection.executeForLastInsertedRowId(SQLiteConnection.java:782)
01-24 11:34:39.764 7763-7763/com.example.siddhi.timetablelayout E/SQLiteDatabase: at android.database.sqlite.SQLiteSession.executeForLastInsertedRowId(SQLiteSession.java:788)
01-24 11:34:39.764 7763-7763/com.example.siddhi.timetablelayout E/SQLiteDatabase: at android.database.sqlite.SQLiteStatement.executeInsert(SQLiteStatement.java:86)
01-24 11:34:39.764 7763-7763/com.example.siddhi.timetablelayout E/SQLiteDatabase: at android.database.sqlite.SQLiteDatabase.insertWithOnConflict(SQLiteDatabase.java:1471)
01-24 11:34:39.764 7763-7763/com.example.siddhi.timetablelayout E/SQLiteDatabase: at android.database.sqlite.SQLiteDatabase.insert(SQLiteDatabase.java:1341)
01-24 11:34:39.764 7763-7763/com.example.siddhi.timetablelayout E/SQLiteDatabase: at com.example.siddhi.timetablelayout.EventTableHelper.addEvent(EventTableHelper.java:76)
01-24 11:34:39.764 7763-7763/com.example.siddhi.timetablelayout E/SQLiteDatabase: at com.example.siddhi.timetablelayout.AddEventActivity$5.onClick(AddEventActivity.java:217)


Its showing error on these two lines while inserting row.

db.insert(TABLE, null, values);

db.addEvent(new EventData(eventTitle,dayOfWeek,totalMinutesFrom, totalMinutesTo,location));



EventTableHelper



public class EventTableHelper extends SQLiteOpenHelper {


private static final String TABLE = "event";
private static final String KEY_ID = "id";
private static final String KEY_TITLE = "title";
private static final String KEY_LOCATION = "location";
private static final String KEY_DAY_OF_WEEK = "dayofweek";
private static final String KEY_TOTAL_MINUTES_FROM = "totalminutesfrom";
private static final String KEY_TOTAL_MINUTES_TO = "totalminutesto";



public EventTableHelper(Context context) {
super(context, Constants.DATABASE_NAME, null, Constants.DATABASE_VERSION);
//3rd argument to be passed is CursorFactory instance
}

// Creating Tables
@Override
public void onCreate(SQLiteDatabase db) {
//createTable(db);
}

public void createTable(SQLiteDatabase db){
String CREATE_EVENTS_TABLE = "CREATE TABLE " + TABLE + "("
+ KEY_ID + " INTEGER PRIMARY KEY," + KEY_TITLE + " TEXT,"
+ KEY_DAY_OF_WEEK +"TEXT" + KEY_TOTAL_MINUTES_FROM +"INTEGER"
+ KEY_TOTAL_MINUTES_TO + "INTEGER" + KEY_LOCATION + "TEXT" + ")";

db.execSQL(CREATE_EVENTS_TABLE);

}
// Upgrading database
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
// Drop older table if existed
// db.execSQL("DROP TABLE IF EXISTS " + TABLE);

// createTable(db);

// Create tables again
//onCreate(db);
}

// code to add the new contact
public void addEvent(EventData event) {
SQLiteDatabase db = this.getWritableDatabase();

ContentValues values = new ContentValues();
values.put(KEY_ID, event.getId());
values.put(KEY_TITLE,event.getTitle()); // Contact Name
values.put(KEY_DAY_OF_WEEK,event.getDayofWeek());
values.put(KEY_TOTAL_MINUTES_FROM,event.getFromMinutes());
values.put(KEY_TOTAL_MINUTES_TO,event.getToMinutes());
values.put(KEY_LOCATION,event.getLocation());
// Inserting Row
db.insert(TABLE, null, values);
//2nd argument is String containing nullColumnHack
db.close(); // Closing database connection
}

// code to get the single contact
EventData getEvent(int id) {
SQLiteDatabase db = this.getReadableDatabase();

Cursor cursor = db.query(TABLE, new String[] { KEY_ID,
KEY_TITLE, KEY_DAY_OF_WEEK, KEY_TOTAL_MINUTES_FROM,KEY_TOTAL_MINUTES_TO,KEY_LOCATION }, KEY_ID + "=?",
new String[] { String.valueOf(id) }, null, null, null, null);
if (cursor != null)
cursor.moveToFirst();
EventData eventData = new EventData(Integer.parseInt(cursor.getString(0)),cursor.getString(1), cursor.getString(2),
cursor.getInt(3),cursor.getInt(4),cursor.getString(5));

return eventData;
}



// code to get all contacts in a list view
public List<EventData> getAllEvents() {
List<EventData> conList = new ArrayList<EventData>();
// Select All Query
String selectQuery = "SELECT * FROM " + TABLE;

SQLiteDatabase db = this.getWritableDatabase();
Cursor cursor = db.rawQuery(selectQuery, null);

// looping through all rows and adding to list
if (cursor.moveToFirst()) {
do {

EventData event = new EventData();

event.setId(Integer.parseInt(cursor.getString(0)));
event.setTitle(cursor.getString(1));
event.setDayofWeek(cursor.getString(2));
event.setFromMinutes(cursor.getInt(3));
event.setToMinutes(cursor.getInt(4));
event.setLocation(cursor.getString(5));
// Adding contact to list
conList.add(event);
} while (cursor.moveToNext());
}

// return contact list
return conList;
}
}

How to solve this??

The table has a unique constraint on it. That means that only one row can exist with a given ID value. If you're trying to change some of the values for a row, use UPDATE not INSERT. If you're trying to add this row, you need to either give it a different, unique ID or you need to delete the pre-existing row first. Which of these is the right answer depends on what your app is doing.

Your code probably violates primary key's uniqueness constraint on a `KEY_ID` field.

Two possible solutions are:

1. Make sure that your `EventData.getId()` returns unique values per object. For now, I don't see you pass any identifier to its constructor and perhaps all the events are inserted with the same `id` value.
2. If you don't care about generating ids by yourself, you can add `AUTOINCREMENT` setting to your `KEY_ID` column definition. This way `KEY_ID` field will be filled automatically and each row will have its own, unique value. Once there, don't forget to remove adding `KEY_ID` to `ContentValues` by yourself.

Try checking if the ID is already existed. If true, do not insert, because you already have the row with this ID.

I originally put the new unique constraint infant of the old one. Instead make sure you're current unique column is first:

CREATE TABLE TEST (client_id TEXT unique, remote_id INT unique)

make id column id integer autoincrement, and do not put the id value into content values.

For developers using [Room Persistence Library][1]. You can use

@Insert(onConflict = OnConflictStrategy.REPLACE) // or OnConflictStrategy.IGNORE

in DAO according to [Insert Documentation][2]


[1]:

[To see links please register here]

[2]:

[To see links please register here]

I had the same problem and the problem was that I forgot to add `db.execSQL(YOUR_TABLE);` in my `DbHelper`

If you use **Room** then instead of `@PrimaryKey` you should use `@PrimaryKey(autoGenerate = true)`

and make your id variable optional:

`@Entity(tableName = "contact_table")
data class Contact(@PrimaryKey(autoGenerate = true) @ColumnInfo(name = "id") var id: Long?,
@ColumnInfo(name = "name") val name: String,
@ColumnInfo(name = "phone") val phone: String)`

and then when adding a new item, pass `null` as id, `insert` func will return new id, add it to your object

val contact = Contact(null, name, phone)
contact.id = ContactRoomDatabase.getDatabase().contactDao().insert(contact)

This is the case of duplicate id of the record in the database. Just clear the app storage and try again. A good solution would be adding below in your Dao class.

@Insert (onConflict = OnConflictStrategy.REPLACE)


Correct solution to this problem is to make sure that the id is unique. Please have a look at this [Google Codelabs Room Example][1]


[1]:

[To see links please register here]

Another way to avoid this would be adding ` @PrimaryKey(autoGenerate = true)
`