I'm trying to use Eloquent to perform the following query during a database seed:
SELECT
*
FROM
customers
LEFT JOIN
orders
ON customers.id = orders.customer_id
WHERE
orders.customer_id IS NULL
And here is my implementation in Eloquent:
$c = Customer::leftJoin('orders', function($join) {
$join->on('customers.id', '=', 'orders.customer_id');
})
->whereNull('orders.customer_id')
->first();
Whereas the first query always returns full results, the Eloquent equivalent always returns empty elements for everything but the email
and phone
fields of the customers
table. I'm at a loss to explain this since the Customers
and Orders
models are both artisan generated skeletons.
Ex:
class Customer extends \Eloquent {
// Add your validation rules here
public static $rules = [
// 'title' => 'required'
];
// Don't forget to fill this array
protected $fillable = [];
}
Here is the array that is output when I dd() the first Eloquent query on a seed (generated originally by Faker):
protected $original =>
array(25) {
'id' =>
NULL
'first_name' =>
NULL
'last_name' =>
NULL
'email' =>
string(24) "luther.braun@example.org"
'phone' =>
string(17) "642.150.9176x5684"
'address1' =>
NULL
'address2' =>
NULL
'city' =>
NULL
'state' =>
NULL
'county' =>
NULL
'district' =>
NULL
'postal_code' =>
NULL
'country' =>
NULL
'notes' =>
NULL
'created_at' =>
NULL
'updated_at' =>
NULL
'customer_id' =>
NULL
'total' =>
NULL
}
This can be resolved by specifying the specific column names desired from the specific table like so:
$c = Customer::leftJoin('orders', function($join) {
$join->on('customers.id', '=', 'orders.customer_id');
})
->whereNull('orders.customer_id')
->first([
'customers.id',
'customers.first_name',
'customers.last_name',
'customers.email',
'customers.phone',
'customers.address1',
'customers.address2',
'customers.city',
'customers.state',
'customers.county',
'customers.district',
'customers.postal_code',
'customers.country'
]);
You can also specify the columns in a select like so:
$c = Customer::select('*', DB::raw('customers.id AS id, customers.first_name AS first_name, customers.last_name AS last_name'))
->leftJoin('orders', function($join) {
$join->on('customers.id', '=', 'orders.customer_id')
})->whereNull('orders.customer_id')->first();
Although Other Answers work well, i want to give you alternate short version which i use very often:
Customer::select('customers.*')
->leftJoin('orders', 'customers.id', '=', 'orders.customer_id')
->whereNull('orders.customer_id')->first();
And as in laravel version 5.3
added one more feature which will make your work even simpler look below for example:
Customer::doesntHave('orders')->get();
I would dump your query so you can take a look at the SQL that was actually executed and see how that differs from what you wrote.
You should be able to do that with the following code:
$queries = DB::getQueryLog();
$last_query = end($queries);
var_dump($last_query);
die();
Hopefully that should give you enough information to allow you to figure out what's gone wrong.
我将使用 laravel whereDoesntHave来实现这一点。
Customer::whereDoesntHave('orders')->get();
use Illuminate\Database\Eloquent\Builder;
$query = Customers::with('orders');
$query = $query->whereHas('orders', function (Builder $query) use ($request) {
$query = $query->where('orders.customer_id', 'NULL')
});
$query = $query->get();
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