Polymorphic One to Many Relationship Example

Today, We want to share with you Polymorphic One to Many Relationship Example.In this post we will show you , hear for Laravel 5.7 One to Many Polymorphic Relationship we will give you demo and example for implement.In this post, we will learn about One-To-Many polymorphic relationship with an example.

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Polymorphic One to Many Relationship Example

There are the Following The simple About Polymorphic One to Many Relationship Example Full Information With Example and source code.

As I will cover this Post with live Working example to develop Eloquent Polymorphic One to Many Relationships, so the Laravel-Many-to-one Polymorphic relationship for this example is following below.

Laravel Eloquent Relationships Tutorial with Examples

Example details:

In this Example we have 3 models (Boy, Girl and Mobile), and 3 tables (boy, girl and mobiles).

Business Rules:

  • The Boy (customer) can buy many Mobiles.
  • The Girl (customer) can buy many Mobiles.
  • The Mobile can be bought by one customer (Boy or Girl).

Relationship Details:

The Mobile table should store the Customer ID and the Customer Type.
“customer” is a name given to a group of models (Boy and Girl). And it’s not limited to two. The customer type is the real name of the model.

Laravel 5.7 Eloquent Models:

class Boy
{
    public function mobiles()
    {
        return $this->morphMany(Mobile::class, 'customer');
    }
}
class Girl
{
    public function mobiles()
    {
        return $this->morphMany(Mobile::class, 'customer');
    }
}
class Mobile
{
    public function customer()
    {
        return $this->morphTo();
    }
}

Laravel Define Database Migrations:

Schema::create('boy', function (Blueprint $table) {
    $table->increments('id');
    $table->string('name');
});
Schema::create('girl', function (Blueprint $table) {
    $table->increments('id');
    $table->string('name');
});
Schema::create('mobiles', function (Blueprint $table) {
    $table->increments('id');
    $table->string('name');
    $table->integer('customer_id')->unsigned()->index()->nullable();
    $table->string('customer_type')->nullable();   
    // or use $table->morphs(‘customer’); instead of "customer_id" and "customer_type"
});

Store/Save Database Records:

// Create relation between customer (Boy/Girl) and Mobile.
$boy->mobiles()->saveMany([
   $mobile1, 
   $mobile2,
]);
$girl->mobiles()->saveMany([
   $mobile1, 
   $mobile2,
]);
// Or use the save() function for single model.
$boy->mobiles()->save($mobile);
$girl->mobiles()->save($mobile);

// Create relation between Mobile and customer (Boy/Girl).
$mobile1->customer()->associate($boy)->save();
$mobile2->customer()->associate($girl)->save();

Retrieve/fetch Records:

// Get customer (Boy/Girl) Mobiles
$boy->mobiles
$girl->mobiles

// Get Mobile customer (Boy and Girl)
$mobile->customer

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