FOREIGN KEY constraint failed (code 787) [NO ANDROID ROOM]
原文
2019-12-09 13:43:57
5
1
android/
android-studio/
android-sqlite/
sqliteopenhelper/
android-database
Question
I have an Android Project on Android Studio with a DataBase which has 3 tables, and one had two FK. I think I saw every code with a solution and any work for me.
This is the error:
E/SQLiteDatabase: Error inserting idTipoFK=TYP-20f4c0ba-8aa7-47c9-9cd8-19861f93f2dd idUserFK=US-c8a20dae-5492-4243-9560-aaf458f3f2d5 adjuntoImg=imagen titulo=titulo idEntrada=ENT-13a62bd7-28ef-46f6-b9b3-b534a0c813ae texto=texto fecha=09-12-2019.12:27:01 adjuntoAudio=audio
android.database.sqlite.SQLiteConstraintException: FOREIGN KEY constraint failed (code 787)
at android.database.sqlite.SQLiteConnection.nativeExecuteForLastInsertedRowId(Native Method)
at android.database.sqlite.SQLiteConnection.executeForLastInsertedRowId(SQLiteConnection.java:782)
at android.database.sqlite.SQLiteSession.executeForLastInsertedRowId(SQLiteSession.java:788)
at android.database.sqlite.SQLiteStatement.executeInsert(SQLiteStatement.java:86)
at android.database.sqlite.SQLiteDatabase.insertWithOnConflict(SQLiteDatabase.java:1474)
at android.database.sqlite.SQLiteDatabase.insert(SQLiteDatabase.java:1343)
at dam.proyecto.nasciturus.Database.OperacionesDataBase.insertarEntry(OperacionesDataBase.java:102)
at dam.proyecto.nasciturus.Actividades.ListarActivity$4.onClick(ListarActivity.java:116)
at android.view.View.performClick(View.java:5637)
at android.view.View$PerformClick.run(View.java:22429)
at android.os.Handler.handleCallback(Handler.java:751)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6119)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)
Ok, my DB:
public class DataBase extends SQLiteOpenHelper
{
//VARIABLES DE CONEXION
private static final String BASE_DATOS = "nascitur.db";
private static final int VERSION_ACTUAL = 4;
private Context contexto;
//METODOS PARA CONECTAR Y CERRAR A LA BBDD
public DataBase(Context contexto)
{
super(contexto, BASE_DATOS, null, VERSION_ACTUAL);
this.contexto = contexto;
}
@Override
public void onOpen(SQLiteDatabase db)
{
super.onOpen(db);
if(!db.isReadOnly())
{
if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN)
{
db.setForeignKeyConstraintsEnabled(true);
}
else
{
db.execSQL("PRAGMA foreign_keys=ON");
}
}
}
public void onCreate(SQLiteDatabase db)
{
db.execSQL("CREATE TABLE "+ConstantesInterfaces.UserID.TABLA_USER+"("+BaseColumns._ID+" text primary key autoincrement,"
+ConstantesInterfaces.UserID.ID+" text not null unique, "+ConstantesInterfaces.UserID.USUARIO+" text not null, "+ConstantesInterfaces.UserID.PASSWORD+" text not null)");
db.execSQL("CREATE TABLE "+ConstantesInterfaces.TypeID.TABLA_TYPE+" ("+BaseColumns._ID+" text primary key autoincrement,"
+ConstantesInterfaces.TypeID.ID+" text not null unique, "+ConstantesInterfaces.TypeID.TIPO+" text not null)");
db.execSQL("CREATE TABLE "+ConstantesInterfaces.EntradasID.TABLA_ENTRY+" ("+BaseColumns._ID+" text primary key autoincrement,"+ConstantesInterfaces.EntradasID.ID+" text not null unique, "
+ConstantesInterfaces.EntradasID.FECHA+" date not null, "+ConstantesInterfaces.EntradasID.TITULO+" text, "+ConstantesInterfaces.EntradasID.TEXTO+" text, "
+ConstantesInterfaces.EntradasID.ADJUNTOIMG+" text,"+ConstantesInterfaces.EntradasID.ADJUNTOAUDIO+" text,"
+ConstantesInterfaces.EntradasID.ID_USER+" text not null, "+ConstantesInterfaces.EntradasID.ID_TIPO+" text not null, FOREIGN KEY("
+ConstantesInterfaces.EntradasID.ID_USER+") REFERENCES "+ConstantesInterfaces.UserID.TABLA_USER+
" ("+ConstantesInterfaces.UserID.ID+") ON DELETE CASCADE, FOREIGN KEY("+ConstantesInterfaces.EntradasID.ID_TIPO+") REFERENCES "
+ConstantesInterfaces.TypeID.TABLA_TYPE+" ("+ConstantesInterfaces.TypeID.ID+") ON DELETE CASCADE)");
}
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion)
{
db.execSQL("DROP TABLE IF EXISTS "+ ConstantesInterfaces.UserID.TABLA_USER);
db.execSQL("DROP TABLE IF EXISTS "+ ConstantesInterfaces.TypeID.TABLA_TYPE);
db.execSQL("DROP TABLE IF EXISTS "+ ConstantesInterfaces.EntradasID.TABLA_ENTRY);
onCreate(db);
}
}
and the insert method:
public void insertarEntry(Entry entrada) {
SQLiteDatabase db = baseDatos.getWritableDatabase();
// Generar Pk
String idEntrada = ConstantesInterfaces.EntradasID.generarIdEntrada();
ContentValues valores = new ContentValues();
valores.put(ConstantesInterfaces.EntradasID.ID, idEntrada);
valores.put(ConstantesInterfaces.EntradasID.FECHA, entrada.fecha);
valores.put(ConstantesInterfaces.EntradasID.TITULO, entrada.titulo);
valores.put(ConstantesInterfaces.EntradasID.TEXTO, entrada.texto);
valores.put(ConstantesInterfaces.EntradasID.ADJUNTOIMG, entrada.adjuntoImg);
valores.put(ConstantesInterfaces.EntradasID.ADJUNTOAUDIO, entrada.adjuntoAudio);
valores.put(ConstantesInterfaces.EntradasID.ID_USER, entrada.idUsuario);
valores.put(ConstantesInterfaces.EntradasID.ID_TIPO, entrada.idTipo);
// Insertar entrada
db.insert(ConstantesInterfaces.EntradasID.TABLA_ENTRY, null, valores);
}
Finally, that's the object that I send as param to the method:
Entry entrada = new Entry(ConstantesInterfaces.EntradasID.generarIdEntrada(),fecha, "titulo","texto",adjuntoImg, "audio" ,usuario , tipo);
OperacionesDataBase db = OperacionesDataBase.obtenerInstancia(getApplicationContext());
db.insertarEntry(entrada);
1 answers
solution1
0 2019-12-10 02:44:07
By defining a column or columns with FORIEGN KEYS you are defining a rule (constraint) that says that the column can only contain a value or values that is or are a value or values in the column or columns of the parent table.
That is using :-
...... FOREIGN KEY("
+ConstantesInterfaces.EntradasID.ID_USER+") REFERENCES "+ConstantesInterfaces.UserID.TABLA_USER+
" ("+ConstantesInterfaces.UserID.ID+") ON DELETE CASCADE, FOREIGN KEY("+ConstantesInterfaces.EntradasID.ID_TIPO+") REFERENCES "
+ConstantesInterfaces.TypeID.TABLA_TYPE+" ("+ConstantesInterfaces.TypeID.ID+") ON DELETE CASCADE)");
You are saying
a) That the column, as per
ConstantesInterfaces.EntradasID.ID_USER, has a rule that says that the value of theConstantesInterfaces.EntradasID.ID_USERcolumn MUST be a value that exists in theConstantesInterfaces.UserID.IDcolumn of any of rows of theConstantesInterfaces.UserID.TABLA_USERtable. andb) That the column, as per
ConstantesInterfaces.EntradasID.ID_TIPO, has a rule that says that the value of theConstantesInterfaces.EntradasID.ID_TIPOcolumn MUST be a value that exists in theConstantesInterfaces.TypeID.IDcolumn of any of the rows of theConstantesInterfaces.TypeID.TABLA_TYPEtable.
If the above rules are not obsereved then the result will be a FOREIGN KEY constraint failed .
As such you need to insert rows in the parent tables so that they can be referenced BEFORE inserting into the ConstantesInterfaces.EntradasID.TABLA_ENTRY table.
There needs to be a row in the ConstantesInterfaces.UserID.TABLA_USER table that has a value of US-c8a20dae-5492-4243-9560-aaf458f3f2d5 in the ConstantesInterfaces.UserID.ID column
AND
There needs to be a row in the ConstantesInterfaces.TypeID.TABLA_TYPE table that has a value of TYP-20f4c0ba-8aa7-47c9-9cd8-19861f93f2dd in the ConstantesInterfaces.TypeID.TIPO column.
Note
There appears to be a significant issue with the code that you have provided. All three table definitions have/use :-
text primary key autoincrement
This is invalid SQL as you can ONLY use AUTOINCREMENT with integer primary key . Using text primary key autoincrement will result in an error.
Example/Test
Assuimng a DataBase.java that includes the insert methods for all three tables as per :-
public long insertEntry(String id,String fecha,String title, String to, String image,String audio, String userIdReference, String typeIdReference) {
long rv = -1;
try {
ContentValues cv = new ContentValues();
cv.put(ConstantesInterfaces.EntradasID.ID, id);
cv.put(ConstantesInterfaces.EntradasID.FECHA, fecha);
cv.put(ConstantesInterfaces.EntradasID.TITULO, title);
cv.put(ConstantesInterfaces.EntradasID.TEXTO, to);
cv.put(ConstantesInterfaces.EntradasID.ADJUNTOIMG, image);
cv.put(ConstantesInterfaces.EntradasID.ADJUNTOAUDIO, audio);
cv.put(ConstantesInterfaces.EntradasID.ID_USER, userIdReference);
cv.put(ConstantesInterfaces.EntradasID.ID_TIPO, typeIdReference);
rv = this.getWritableDatabase().insertOrThrow(ConstantesInterfaces.EntradasID.TABLA_ENTRY, null, cv);
} catch (SQLiteException e) {
e.printStackTrace();
}
return rv;
}
public long insertType(String id, String type) {
ContentValues cv = new ContentValues();
cv.put(ConstantesInterfaces.TypeID.ID,id);
cv.put(ConstantesInterfaces.TypeID.TIPO,type);
return this.getWritableDatabase().insert(ConstantesInterfaces.TypeID.TABLA_TYPE,null,cv);
}
public long insertUser(String id, String userName, String password) {
ContentValues cv = new ContentValues();
cv.put(ConstantesInterfaces.UserID.ID,id);
cv.put(ConstantesInterfaces.UserID.USUARIO,userName);
cv.put(ConstantesInterfaces.UserID.PASSWORD,password);
return this.getWritableDatabase().insert(ConstantesInterfaces.UserID.TABLA_USER,null,cv);
}
- Note how the insertEntry uses insertOrThrow , so that the error can be trapped and subsequent attemtpos can be attempted.
and additionall the following code in an Activity :-
public class MainActivity extends AppCompatActivity {
DataBase mDB;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
String userid = "US-c8a20dae-5492-4243-9560-aaf458f3f2d5";
String typeid = "TYP-20f4c0ba-8aa7-47c9-9cd8-19861f93f2dd";
Log.d("FKTESTINFO","Stage 1 - Instantiating database instance");
mDB = new DataBase(this);
//DatabaseUtils.dumpCursor(mDB.getWritableDatabase().query("sqlite_master",null,null,null,null,null,null));
Log.d("FKTESTINFO","Stage 2 - INSERT attempt 1");
mDB.insertEntry("w","x","y","x","img","audio",userid,typeid); // FAIL as Type nor User exist
Log.d("FKTESTINFO","Stage 3 - INSERT attempt 2");
mDB.insertUser(userid,"Fred","password");
mDB.insertEntry("w","x","y","x","img","audio",userid,typeid); // FAIL as Type does not exist
Log.d("FKTESTINFO","Stage 4 - INSERT attempt 3");
mDB.insertType(typeid,"My Type");
mDB.insertEntry("w","x","y","x","img","audio",userid,typeid); // FAIL as Type does not exist
Log.d("FKTESTINFO","Stage 5 - All Completed");
}
}
The the result shows that not until both the referenced Type and the referenced User are added, does the Entry insert work, as per :-
2019-12-10 13:42:47.547 D/FKTESTINFO: Stage 1 - Instantiating database instance
2019-12-10 13:42:47.547 D/FKTESTINFO: Stage 2 - INSERT attempt 1
2019-12-10 13:42:47.567 W/System.err: android.database.sqlite.SQLiteConstraintException: FOREIGN KEY constraint failed (code 787 SQLITE_CONSTRAINT_FOREIGNKEY)
2019-12-10 13:42:47.567 W/System.err: at android.database.sqlite.SQLiteConnection.nativeExecuteForLastInsertedRowId(Native Method)
2019-12-10 13:42:47.567 W/System.err: at android.database.sqlite.SQLiteConnection.executeForLastInsertedRowId(SQLiteConnection.java:879)
2019-12-10 13:42:47.567 W/System.err: at android.database.sqlite.SQLiteSession.executeForLastInsertedRowId(SQLiteSession.java:790)
2019-12-10 13:42:47.567 W/System.err: at android.database.sqlite.SQLiteStatement.executeInsert(SQLiteStatement.java:88)
2019-12-10 13:42:47.567 W/System.err: at android.database.sqlite.SQLiteDatabase.insertWithOnConflict(SQLiteDatabase.java:1599)
2019-12-10 13:42:47.567 W/System.err: at android.database.sqlite.SQLiteDatabase.insertOrThrow(SQLiteDatabase.java:1494)
2019-12-10 13:42:47.567 W/System.err: at a.so59250186foreignkeys.DataBase.insertEntry(DataBase.java:135)
2019-12-10 13:42:47.567 W/System.err: at a.so59250186foreignkeys.MainActivity.onCreate(MainActivity.java:26)
2019-12-10 13:42:47.567 W/System.err: at android.app.Activity.performCreate(Activity.java:7802)
2019-12-10 13:42:47.567 W/System.err: at android.app.Activity.performCreate(Activity.java:7791)
2019-12-10 13:42:47.567 W/System.err: at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1299)
2019-12-10 13:42:47.567 W/System.err: at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3245)
2019-12-10 13:42:47.568 W/System.err: at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3409)
2019-12-10 13:42:47.568 W/System.err: at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:83)
2019-12-10 13:42:47.568 W/System.err: at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
2019-12-10 13:42:47.568 W/System.err: at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
2019-12-10 13:42:47.568 W/System.err: at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2016)
2019-12-10 13:42:47.568 W/System.err: at android.os.Handler.dispatchMessage(Handler.java:107)
2019-12-10 13:42:47.568 W/System.err: at android.os.Looper.loop(Looper.java:214)
2019-12-10 13:42:47.568 W/System.err: at android.app.ActivityThread.main(ActivityThread.java:7356)
2019-12-10 13:42:47.568 W/System.err: at java.lang.reflect.Method.invoke(Native Method)
2019-12-10 13:42:47.568 W/System.err: at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
2019-12-10 13:42:47.568 W/System.err: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:930)
2019-12-10 13:42:47.568 D/FKTESTINFO: Stage 3 - INSERT attempt 2
2019-12-10 13:42:47.572 W/System.err: android.database.sqlite.SQLiteConstraintException: FOREIGN KEY constraint failed (code 787 SQLITE_CONSTRAINT_FOREIGNKEY)
2019-12-10 13:42:47.572 W/System.err: at android.database.sqlite.SQLiteConnection.nativeExecuteForLastInsertedRowId(Native Method)
2019-12-10 13:42:47.572 W/System.err: at android.database.sqlite.SQLiteConnection.executeForLastInsertedRowId(SQLiteConnection.java:879)
2019-12-10 13:42:47.572 W/System.err: at android.database.sqlite.SQLiteSession.executeForLastInsertedRowId(SQLiteSession.java:790)
2019-12-10 13:42:47.572 W/System.err: at android.database.sqlite.SQLiteStatement.executeInsert(SQLiteStatement.java:88)
2019-12-10 13:42:47.572 W/System.err: at android.database.sqlite.SQLiteDatabase.insertWithOnConflict(SQLiteDatabase.java:1599)
2019-12-10 13:42:47.572 W/System.err: at android.database.sqlite.SQLiteDatabase.insertOrThrow(SQLiteDatabase.java:1494)
2019-12-10 13:42:47.573 W/System.err: at a.so59250186foreignkeys.DataBase.insertEntry(DataBase.java:135)
2019-12-10 13:42:47.573 W/System.err: at a.so59250186foreignkeys.MainActivity.onCreate(MainActivity.java:30)
2019-12-10 13:42:47.573 W/System.err: at android.app.Activity.performCreate(Activity.java:7802)
2019-12-10 13:42:47.573 W/System.err: at android.app.Activity.performCreate(Activity.java:7791)
2019-12-10 13:42:47.573 W/System.err: at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1299)
2019-12-10 13:42:47.573 W/System.err: at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3245)
2019-12-10 13:42:47.573 W/System.err: at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3409)
2019-12-10 13:42:47.573 W/System.err: at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:83)
2019-12-10 13:42:47.573 W/System.err: at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
2019-12-10 13:42:47.573 W/System.err: at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
2019-12-10 13:42:47.573 W/System.err: at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2016)
2019-12-10 13:42:47.574 W/System.err: at android.os.Handler.dispatchMessage(Handler.java:107)
2019-12-10 13:42:47.574 W/System.err: at android.os.Looper.loop(Looper.java:214)
2019-12-10 13:42:47.574 W/System.err: at android.app.ActivityThread.main(ActivityThread.java:7356)
2019-12-10 13:42:47.574 W/System.err: at java.lang.reflect.Method.invoke(Native Method)
2019-12-10 13:42:47.574 W/System.err: at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
2019-12-10 13:42:47.574 W/System.err: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:930)
2019-12-10 13:42:47.574 D/FKTESTINFO: Stage 4 - INSERT attempt 3
2019-12-10 13:42:47.585 D/FKTESTINFO: Stage 5 - All Completed
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