's belongsto or hasOne how to get data from linked table?

Stuck can't move forward, explain to me please:

There are two table Areas(structure id, district) and Ads(structure id, district_id, text)

Conventionally, in the controller, write the following Ads:
public function allads(){
 return view('test2', compact('adsall'));

The output in the view have the array $adsall with all the ads and with the help of this design we have {{$ads->district_id}} . How to display not the ID of the district and his real name from the second table when checking with a field district_id?
March 23rd 20 at 19:40
1 answer
March 23rd 20 at 19:42
class District extends Model {
 public function ads () {

class Ad extends Model {
 public function district () {
 $this->'s belongsto(District ::class);

$adsall = Ad::with(['district'])->latest()->paginate(10);
get the error
Call to a member function addEagerConstraints() on null - darren92 commented on March 23rd 20 at 19:45
return all figured out I forgot to specify - darren92 commented on March 23rd 20 at 19:48

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