Laravel - eloquent 关系

Question

This is meal table:

Id, Category_Id

This is categories table:

Id, Slug

How do I define relationship between those 2 (return array Meal with array category inside to get slug) I tried putting this:

meal.php

function returnCategories()
{
return $this->belongsTo(Category::class);
}

and this doesnt work

Edit:

In Controller file I want to define it like: Meal::with('returnCategories');

Controller code: return Meal::select('id')->with('category')->get();

Answer 1

try this

function returnCategories()
{
    return $this->belongsTo(Category::class, 'Category_Id', 'Id');
}

or you can try

function category()
    {
        return $this->belongsTo(Category::class, 'Category_Id', 'Id');
    }

and try using select(*). this worked for me.

    $meals = Meal::select( '*' )->with('category')->get();