How to create related data

[freimaks]

Hi!

I cannot figure out how to correctly create data related to other data. The documentation provides an example with a blog post and comments. But it is not shown how to correctly create comments.

If I understand the documentation and the spec correctly, we only use the route POST /posts/1/relationships/comments to attach an existing comment to a blog post.

Apparently, to create a comment, we must use the standard route POST /comments. If so, then the information passed in the request should look something like this:

{
  "data": {
    "type": "comments",
    "attributes": {
      "comment": "My comment"
    },
    "relationships": {
      "post": {
        "data": {
          "type": "posts",
          "id": "1"
        }
      }
    }
  }
}

Next, I probably have to write my processing in the controller, etc. Am I right? Or does the related data need to be created in some other way? For example, we can simply add the post_id field to the attributes of the new comment.

[freimaks]

I found my mistake. I listed the blog as readOnly in the comment scheme.

[RobyCigar]

same problem here

[lindyhopchris]

This is all unit testing and working in production. @RobyCigar if you're having problems you'll need to provide more detail.

[RobyCigar]

sorry for my response,
heres my problem, I tried to follow this docs where the reader can create a resource with the corresponding relationships https://laraveljsonapi.io/docs/2.0/tutorial/05-creating-resources.html

I tried to follow the same step, i have the following ProductSchema.php

// other code
    /**
     * Get the resource fields.
     *
     * @return array
     */
    public function fields(): array
    {
        return [
            ID::make(),
            Str::make('name')->sortable(),
            Str::make('description')->sortable(),
            Number::make('stock')->sortable(),
            Number::make('price')->sortable(),
            DateTime::make('createdAt')->sortable()->readOnly(),
            DateTime::make('updatedAt')->sortable()->readOnly(),
            BelongsTo::make('product-categories', 'productCategories'),
        ];
    }
// other code

and ProductRequest.php

class ProductRequest extends ResourceRequest
{

    /**
     * Get the validation rules for the resource.
     *
     * @return array
     */
    public function rules(): array
    {
        return [
            'name' => ['required', 'string', Rule::unique('products', 'name')],
            'description' => ['nullable'],
            'stock' => ['required', 'integer'],
            'price' => ['required', 'integer'],
            'product-category' => JsonApiRule::toOne()
        ];
    }

}

heres the Product model

class Product extends Model
{
    use HasFactory;

    protected $fillable = [
        'name',
        'description',
        'price',
        'stock',
        'product_category_id'
    ];

    public function serving($model) {
        dd($model);
    }

    public function productCategories(): BelongsTo {
        return $this->belongsTo(ProductCategory::class, 'product_category_id');
    }
}

and heres my table definition

       Schema::create('products', function (Blueprint $table) {
            $table->id();
            $table->string('name', 50)->nullable(false);
            $table->string('description');
            $table->integer('price');
            $table->integer('stock');
            $table->foreignId('product_category_id')->on('id');
            $table->timestamps();
        });

I tried to fill the product resource with product-category relationships with these payload

{
    "data": {
        "type": "products",
        "attributes": {
            "description": "In",
            "price": 20000,
            "stock": 10,
            "name": "How"
        },
        "relationships": {
            "product-categories": {
                "data": {
                    "type": "product-categories",
                    "id": "2"
                }
            }
        }
    }
}

but somehow the product_category_id value is not there
i still dont understand why my payload doenst match with my model
the documentation have the following code, but how can i put this on my code since my code dont have any relationships to the Auth::user()

     /**
      * Bootstrap the server when it is handling an HTTP request.
      *
      * @return void
      */
     public function serving(): void
     {
-       // no-op
+       Post::creating(static function (Post $post): void {
+.           $post->author()->associate(Auth::user());
+       });
     }

[lindyhopchris]

So the serving() thing has nothing to do with what you're trying to do, so you can disregard that.

The problem is in the rules() method of your validator. You've got this:

'product-category' => JsonApiRule::toOne()

but shouldn't it be this?

'product-categories' => JsonApiRule::toOne()

we only fill validated data, so if your validation is wrong the value won't be transferred over to the model.

[RobyCigar]

thank you so much, i didnt notice that the rules() is mapped to the schema, i thought it map to the model directly.
also thank you for the awesome library