I have to create 2 to 3 tables and I want to create foreign key of two tables and add into 3rd table. When I run the app data is inserted successfully but foreign key is not showing in the database table structure and table.
Here is my Database class:
public static final String Tsk_id = "task_id";
public static final String Task_Project_NAme = "project_name";
public static final String Task_Team_Member_Name = "assign_to";
public static final String Task_Title = "task_time";
public static final String Task_Start_Date = "start_date";
public static final String Task_CompletionDate = "completion_date";
public static final String Task_CompletionTime = "completion_time";
public static final String Task_Description = "task_description";
public static final String Task_Status = "task_status";
public static final String Task_Is_Active = "IsActive";
public static final String Task_Project_id="project_id";
public static final String Task_Team_Memmber_Id="team_member_id";
@Override
public void onCreate(SQLiteDatabase db) {
// TODO Auto-generated method stub
String CREATE_TASK_TABLE = "CREATE TABLE " + ASSIGN_TASK_TABLE + "("
+ Tsk_id +" integer primary key autoincrement, "
+ Task_Project_NAme + " TEXT,"
+ Task_Team_Member_Name + " TEXT,"
+ Task_Title + " TEXT,"
+ Task_Start_Date + " TEXT,"
+ Task_CompletionDate + " TEXT,"
+ Task_CompletionTime + " TEXT,"
+ Task_Description + " TEXT,"
+ Task_Status + " TEXT,"
+ Task_Is_Active + " TEXT"
+ " FOREIGN KEY ("+Task_Project_id+") REFERENCES " +CONTACTS_TABLE_NAME+" ("+Project_id+")"
+ " FOREIGN KEY ("+Task_Team_Memmber_Id+") REFERENCES " +DEFINE_TEAM_MEMBER_TABLE+" ("+Team_Member_id+")";
db.execSQL(CREATE_TASK_TABLE);
}
public boolean insertTaskDetails(String strTask_Project_NAme,String strTask_Team_Member_Name,
String strTask_Title,String strTask_Start_Date,String strTask_CompletionDat,
String strTask_CompletionTime,String strTask_Description,
String strTask_Status,String strTask_Is_Active)
{
SQLiteDatabase db = this.getWritableDatabase();
ContentValues contentValues = new ContentValues();
contentValues.put(Task_Project_NAme, strTask_Project_NAme);
contentValues.put(Task_Team_Member_Name, strTask_Team_Member_Name);
contentValues.put(Task_Title, strTask_Title);
contentValues.put(Task_Start_Date, strTask_Start_Date);
contentValues.put(Task_CompletionDate,strTask_CompletionDat);
contentValues.put(Task_CompletionTime,strTask_CompletionTime);
contentValues.put(Task_Description, strTask_Description);
contentValues.put(Task_Status, strTask_Status);
contentValues.put(Task_Is_Active,strTask_Is_Active);
db.insert(ASSIGN_TASK_TABLE, null, contentValues);
db.close();
return true;
}
+ " FOREIGN KEY ("+Task_Project_id+") REFERENCES " +CONTACTS_TABLE_NAME+" ("+Project_id+")"
for this line of code where is Task_Project_id column in the while creating the table.. please check.
You need to create a particular column to reference as foreign key.
same with this line too
" FOREIGN KEY ("+Task_Team_Memmber_Id+") REFERENCES " +DEFINE_TEAM_MEMBER_TABLE+" ("+Team_Member_id+")";
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