Laravel define relationship between two tables - sql

Question

I have the following tables
1. Environment
--------------
env_id
env_name
env_description
repo_id
2. Repository
--------------
repo_id
repo_name
repo_url
Now multiple environments can be associated with same repository. I am very new to Eloquent and so has a confusion that which kind of relation this is ? I have an api and I would like to return repo details when I access an environment endoint. So when I use Evironment::all(), I would like to get the associated Repository. How can I do this ?
I went through the examples given in the documentation, but it seems like I have a scenario which is not mentioned there.

Answer 1

That will be a One To Many(inverse) relationship.
//Environment Model
public function repository()
{
return $this->belongsTo('App\Repository');
}
//Repository Model
public function environments()
{
return $this->hasMany('App\Environment', 'repo_id');
}
Then you can return all the Environment with their relationship as follow:
Environment::with('repository')->get();

Answer 2

According to your description, it should be a one-to-many relationship between two tables. Therefore, in plain English sentences, it would be, the Repository has many Environments and the Environment model belongs to the Repository. Let's build up those two models.
Repository model:
<?php
namespace App;
use Illuminate\Database\Eloquent\Model;
class Repository extends Model
{
public function environments()
{
return $this->hasMany(Environment::class);
}
}
Environment model:
<?php
namespace App;
use Illuminate\Database\Eloquent\Model;
class Environment extends Model
{
public function repo()
{
return $this->belongsTo(Repository::class);
}
}
Notice: I name after Environment::repo() instead of Environment::repository().
If we called Environment::repository as a property on the Environment object inside a foreach loop, it would return null instead of Repository object. It may be eloquent's naming issue. To be honest, I don't know the reason so far. I'm using Laravel 7.
Once you're done with the creations of models, you can play with data using them. As you need to get the associated Repository object with Environment object, check out the following code:
<?php
$environments = Environment::all();
foreach ($environments as $environment) {
echo $environment->repo->repo_name . '<br>';
}