How to retrieve specific column value from foreign key table? - php

Question

There are two Models. One is TradeLicence and another is BusinessCategory.
I have already established relationship between them. In TradeLicence there is a foreign key category_id which local key is id of BusinessCategory.
Trade Licence Model
class TradeLicence extends Model
{
use SoftDeletes;
protected $fillable = ['slug', 'name', 'category_id'];
public function businessCategories()
{
return $this->belongsTo(BusinessCategory::class,'category_id','id');
}
}
trade_licences migration Table:
class CreateTradeLicencesTable extends Migration
{
public function up()
{
Schema::create('trade_licences', function (Blueprint $table) {
$table->id();
$table->string('slug')->unique();
$table->foreignId->('category_id');
$table->string->('name');
$table->timestamps();
});
}
}
Business Category Model:
class BusinessCategory extends Model
{
use SoftDeletes;
protected $fillable = ['slug', 'name', 'fees'];
}
business_categories migration table:
class CreateBusinessCategoriesTable extends Migration
{
public function up()
{
Schema::create('business_categories', function (Blueprint $table) {
$table->id();
$table->string('slug')->unique();
$table->string('name');
$table->double('fees');
$table->timestamps();
});
}
For adding a "Trade Licence", I need to select a "Business Category" and it stores the value
incategory_id column of trade_licencestable. I'm able to retrieve the name and fees value through the relationship inside TradeLicense model.
The problem is:
There is a another Model named DailyEarning. The show() method of DailyEarningController will display fees amount (fee of selected category, which was selected at the time of creating a new trade licence) and created_at and updated_at value of each Trade License.
My Question is:
How to get the values of fees, created_at and updated_at or which Query should I use to retrieve the values by using "Eloquent"?