I think so:

Add to your Student model:

public function invoices()
{
        return $this->hasMany('App\Invoice');
}

and:

public function results()
{
        return $this->hasMany('App\Result');
}

Inverse relations are: belongsTo

Yes @erdely I've done that already, I am guessing I am messing up on the tables somehow. Could you also tell me what does the 3 tables have it?

My current thing.

    public function Invoices()
    {
        return $this->hasMany('App\Invoices');
    }

    public function results()
    {
        return $this->hasMany('App\Result');
    }

And the table definitions

//The Invoices table
  public function up()
    {
        Schema::create('invoices', function (Blueprint $table) {
            $table->increments('id');
            $table->integer('student_id')->unsigned()->nullable()->index();
            $table->string('name');
            $table->string('student_roll');
            $table->string('fees_paid');
            $table->string('fees_remaining');
            $table->string('fees_total');


            $table->timestamps();
        });
    }

//The Students table
  public function up()
    {
        Schema::create('students', function (Blueprint $table) {
            $table->increments('id');
            $table->string('name');
            $table->string('roll');
            $table->string('address');
            $table->string('school');
            $table->string('city');
            $table->string('class');
            $table->string('email')->unique()->nullable();
            $table->string('phone');
            $table->timestamps();
        });
    }

//The results table
 public function up()
    {
        Schema::create('results', function (Blueprint $table) {
            $table->increments('id');
            $table->integer('student_id')->unsigned()->nullable()->index();
            $table->string('name');
            $table->string('Physics');
            $table->string('Maths');
            $table->string('Chemistry');
            $table->string('Biology');
            $table->timestamps();
        });
    }

I want to have something like when I click "Student's roll number" I gets me back the related Invoices and related Results (can be many)

erdely said:

You have to define relations also in your migration: https://laravel.com/docs/5.3/migrations#foreign-key-constraints

Keep convenient table names and model names...

If you want to connect 2 tables in with third table then use pivot relationship or try: hasManyThrough

I showed you the relations in tables, i want to ask weather or not its correct.