'Adding data of one entity to other entity Coredata

I have an entity named as Course and other as Tasks. To complete a course, user can create multiple Tasks. Now i have a screen with UITextFields that takes Course data and store it. User can create multiple courses and see them in a tableview.

Now, if the user selects a course, he will get the course detail fetched from the coredata, but at the same time he can also add a task in that course.

So what my issue is : How do i know that the task that is being saved has to be linked to that particular course that the user has selected.

Screenshot of DB Attached:

Comment if i am not clear.

This is what i am trying to do in CoreDataHandler.swift file

  class func saveTask(courseWorkName : CourseWork, taskName:String, percentComplete:Int, startDate:Date, endDate: Date, notes: String) -> Bool {
    let context = getContext()
    let entity = NSEntityDescription.entity(forEntityName: "Tasks", in: context)
    let task = NSManagedObject(entity: entity!, insertInto: context)

    let entity1 = NSEntityDescription.entity(forEntityName: "CourseWork", in: context)
    let courseWork = NSManagedObject(entity: entity1!, insertInto: context)


  //  task.setValue(entity1, forKey: "courseworkName")
    task.setValue(taskName, forKey: "taskName")
    task.setValue(percentComplete, forKey: "moduleName")
    task.setValue(notes, forKey: "notes")
    task.setValue(startDate, forKey: "startDate")
    task.setValue(endDate, forKey: "dueDate")
    task.setValue(courseWorkName, forKey: "courseWork")


    do {
        try context.save()
        return true
    }catch {
        return false
    }
}

Solution 1:^[1]

Pass your courseWork Object to next pushed controller and access it.

At the time of Entering data into table do it like:

objCourse.tasks.append(task)
task.courseWork = objCourse

By doing this you could achieve inverse relationship. Using this you can access course using task and vice versa.

Access it like:

objCourseWork.tasks
objTask.courseWork

Solution 2:^[2]

If you have your relations in your model already defined like below, you only have to set the course property of the task to the course object it should be related with.

Have fun.

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution	Source
Solution 1	Dheeraj D
Solution 2	Marc T.

'Adding data of one entity to other entity Coredata

Solution 1:[1]

Solution 2:[2]

Sources

Related Questions

Solution 1:^[1]

Solution 2:^[2]