android.database.sqlite.SQLiteConstraintException:外键约束失败(代码19)
我有以下在android应用程序中创建sqlLite DB的代码:android.database.sqlite.SQLiteConstraintException:外键约束失败(代码19),android,sqlite,constraints,Android,Sqlite,Constraints,我有以下在android应用程序中创建sqlLite DB的代码: private static final String CREATE_TABELLA_PERSONE = "CREATE TABLE TB_PERSONE " + "(_ID integer," + "CODICE_PERSONA text not null, DESC_PERSONA text null, " + "PRIMARY KEY (CODICE_PERSONA));"; 及 当我调用函数删除“TB_PERSONE”
private static final String CREATE_TABELLA_PERSONE = "CREATE TABLE TB_PERSONE "
+ "(_ID integer,"
+ "CODICE_PERSONA text not null, DESC_PERSONA text null, "
+ "PRIMARY KEY (CODICE_PERSONA));";
及
当我调用函数删除“TB_PERSONE”中的一行时
应用程序显示此错误:
04-27 11:15:27.152: E/AndroidRuntime(22031): FATAL EXCEPTION: main
04-27 11:15:27.152: E/AndroidRuntime(22031): android.database.sqlite.SQLiteConstraintException:
foreign key constraint failed (code 19)
04-27 11:15:27.152: E/AndroidRuntime(22031): at android.database.sqlite.SQLiteConnection.nativeExecuteForChangedRowCount(Native Method)
04-27 11:15:27.152: E/AndroidRuntime(22031): at android.database.sqlite.SQLiteConnection.executeForChangedRowCount(SQLiteConnection.java:727)
04-27 11:15:27.152: E/AndroidRuntime(22031): at android.database.sqlite.SQLiteSession.executeForChangedRowCount(SQLiteSession.java:754)
04-27 11:15:27.152: E/AndroidRuntime(22031): at android.database.sqlite.SQLiteStatement.executeUpdateDelete(SQLiteStatement.java:64)
04-27 11:15:27.152: E/AndroidRuntime(22031): at android.database.sqlite.SQLiteDatabase.delete(SQLiteDatabase.java:1494)
04-27 11:15:27.152: E/AndroidRuntime(22031): at it.jackpot21.personalmoney.DbAdapter.SQLdelete(DbAdapter.java:89)
04-27 11:15:27.152: E/AndroidRuntime(22031): at it.jackpot21.personalmoney.PersoneActivity$5.onClick(PersoneActivity.java:215)
04-27 11:15:27.152: E/AndroidRuntime(22031): at android.view.View.performClick(View.java:4084)
04-27 11:15:27.152: E/AndroidRuntime(22031): at android.view.View$PerformClick.run(View.java:16966)
04-27 11:15:27.152: E/AndroidRuntime(22031): at android.os.Handler.handleCallback(Handler.java:615)
04-27 11:15:27.152: E/AndroidRuntime(22031): at android.os.Handler.dispatchMessage(Handler.java:92)
04-27 11:15:27.152: E/AndroidRuntime(22031): at android.os.Looper.loop(Looper.java:137)
04-27 11:15:27.152: E/AndroidRuntime(22031): at android.app.ActivityThread.main(ActivityThread.java:4745)
04-27 11:15:27.152: E/AndroidRuntime(22031): at java.lang.reflect.Method.invokeNative(Native Method)
04-27 11:15:27.152: E/AndroidRuntime(22031): at java.lang.reflect.Method.invoke(Method.java:511)
04-27 11:15:27.152: E/AndroidRuntime(22031): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
04-27 11:15:27.152: E/AndroidRuntime(22031): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
04-27 11:15:27.152: E/AndroidRuntime(22031): at dalvik.system.NativeStart.main(Native Method)
有人能帮我吗非常感谢!:) 编辑:
我把
放在DELETE SET NULL上解决了这个问题
谢谢 这意味着一个站点
表中仍然包含一些引用您试图删除的人的记录。您似乎正在从TB\u PERSONE
中删除一条记录,该记录由表一个站点
中的记录引用
所以
1) 在从TB\u PERSONE
中删除记录之前,请先从网站中删除记录
或
2) 在外键定义中的删除级联上设置:
...
PERSONA text not null REFERENCES TB_PERSONE(CODICE_PERSONA) ON DELETE CASCADE ...
...
请确保字符串id
不为空,以便可以执行下面的代码
public int SQLdelete(String tabella, String id) {
return database.delete(tabella, "_ID=" + id, null);
}
你试过什么?检查此链接:并检查此链接:但如果我在TB\u PERSONE
中删除了一条记录,则我不能在AN\u usite
中删除该记录。如果您仍然需要该AN\u usite,则可能需要一些映射表
...
PERSONA text not null REFERENCES TB_PERSONE(CODICE_PERSONA) ON DELETE CASCADE ...
...
public int SQLdelete(String tabella, String id) {
return database.delete(tabella, "_ID=" + id, null);
}