How to pass a variable in join query in laravel?
How to pass a variable in join query in laravel?
1 answer
by
filiberto ,
3 months ago
@domenico
In Laravel, you can pass a variable in a join query by using the DB facade to manually write the SQL query. Here's an example of how to pass a variable in a join query:
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use IlluminateSupportFacadesDB;
$userId = 1;
$result = DB::table('posts')
->join('users', function($join) use ($userId) {
$join->on('posts.user_id', '=', 'users.id')
->where('users.id', '=', $userId);
})
->select('posts.*', 'users.name')
->get();
|
In this example, we are joining the posts table with the users table on the user_id and id columns, and we are using the $userId variable to filter the users. You can pass any variable to the join query using the use ($variable) syntax within the closure function.
Alternatively, you can also use Eloquent relationships to achieve the same result:
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class Post extends Model
{
public function user()
{
return $this->belongsTo(User::class, 'user_id');
}
}
$userId = 1;
$posts = Post::with('user')->whereHas('user', function($query) use ($userId) {
$query->where('id', $userId);
})->get();
|
This will eager load the user related to each post and filter the posts based on the user's id.
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