Getting value from another table through id - database

Question

I am new to laravel. I have a table:
students_attendance.
In students_attendance I have a column named class_id, which refers to the students_classes table that also includes the class_id and class_name for each student.
In the frontend table I am getting the values from students_attendance table so the class_id is available, but what I need is the class_name.
How I can get the class_name?
//Migration for students_attendance
public function up()
{
Schema::create('students_attendances', function (Blueprint $table) {
$table->increments('id');
$table->integer('class_id')->index()->unsigned()->nullable();
$table->string('student_id');
$table->string('first_name');
$table->string('last_name');
$table->string('attendance');
$table->timestamps();
});
}
//Migration for students_classes
public function up()
{
Schema::create('students_classes', function (Blueprint $table) {
$table->increments('id');
$table->string('class_name');
$table->string('class_fee');
$table->string('class_teacher');
$table->timestamps();
});
}
//Students Class Model
class StudentsClass extends Model
{
protected $fillable = [
'class_name',
'class_fee',
'class_teacher'
];
public function students() {
return $this->hasMany('App\Students');
}
}
//Students Attendance Model
class StudentsAttendance extends Model
{
protected $fillable = [
'class_id',
'student_id',
'first_name',
'last_name',
'attendance'
];
public function studentsClass() {
return $this->belongsTo('App\StudentsClass');
}
}

Answer 1

From a StatusAttendance variable you can access the class name with $attendance->studentClass->class_name.
Assuming you have the class_id and you want to get the name of the associated class, you can simply do this:
$class = StudentsClass::find($class_id);
$class->class_name; // Outputs the name