Attempt to read property on int - php

Question

My relations:
Content mode =>
class Content extends Model
{
use HasFactory;
protected $table = "contents";
protected $fillable = [ "body", "camapaign_id" ];
public function campaigns(){
return $this->belongsTo(Campaign::class, "campaign_id");
}
}
My camapaign model =>
class Campaign extends Model
{
use HasFactory;
protected $table = "campaigns";
protected $fillable = [ "ringba_campaign_id", "is_active" ];
public function contents(){
return $this->hasMany(Content::class, "content_id");
}
}
Here are my migrations:
content table =>
public function up()
{
Schema::create('contents', function (Blueprint $table) {
$table->id();
$table->timestamps();
$table->string("body", 255);
$table->foreignIdFor(\App\Models\Campaign::class)->nullable();
});
}
Campaign table =>
public function up()
{
Schema::create('campaigns', function (Blueprint $table) {
$table->id();
$table->timestamps();
$table->string("ringba_campaign_id", 255);
$table->boolean("is_active")->default(0);
});
}
Here is my content controller:
public function index(){
$contents = Content::all()->sortBy("created_at");
return view("Dashboard.Contents.contents", [
"contents" => $contents
]);
}
I am trying to access ringba_camapaign_id in here like this =>
#foreach($contents as $content)
{{ $content->campaign_id->ringba_campaign_id }}
#endforeach
But I am getting this error : Attempt to read property on int

Answer 1

A couple of things here, since Content BelongsTo a Campaign the method should be singular.
public function campaign(): BelongsTo
{
return $this->belongsTo(Campaign::class, 'campaign_id');
}
Then when you do $content->campaign_id you are getting the property on the model and so is returning an int. What you want to do is return the campaign model like so $content->campaign through the relationship defined in the Content model. Now you can access the property on the campaign model, $content->campaign->ringba_campaign_id.
However it also looks like a campaign can be nullable by your migration so you would need to add protection from this so you don't get property on null errors. So this would look like optional($content->campaign)->ringba_campaign_id, this would then return null if the Content didn't have a Campaign.

Answer 2

Actually I wrote bad relation code inside content model:
Before I wrote:
public function campaigns(){
return $this->belongsTo(Campaign::class);
}
Answer will be :
public function campaign(){
return $this->belongsTo(Campaign::class);
}
I wrote campaigns instead of campaign.

Answer 3

try this.
#foreach($contents as $content)
{{ $content->campaigns->ringba_campaign_id }}
#endforeach
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