By eager loading the nested relationship, we reduce the total number of queries from 11 to 3. 7. Do not load belongsTo relationship if you just need its id Imagine you have two tablespostsandauthors. Posts table has a columnauthor_idwhich represents a belongsTo relationship on the authors ...
You may use "dot" notation to execute a query against a nested relationship. For example, the following query will retrieve all posts that do not have comments; however, posts that have comments from authors that are not banned will be included in the results:use Illuminate\Database\Eloquent...
To do so, you may pass the name of the relationship to the has method:1// Retrieve all posts that have at least one comment... 2$posts = App\Post::has('comments')->get();You may also specify an operator and count to further customize the query:...
A one-to-one relationship is a very basic relation. For example, a User model might have one Phone. We can define this relation in Eloquent:1class User extends Eloquent { 2 3 public function phone() 4 { 5 return $this->hasOne('Phone'); 6 } 7 8}The first argument passed to ...
In addition, Eloquent assumes that the foreign key has a value matching the id (or the custom $primaryKey) column of the parent. This means that, Eloquent will look for the value of the user's id column in the user_id column of the Phone record. If we would like the relationship to...
This portion of the documentation only discusses non-relationship fields. To learn more about relationship fields, check out their documentation.Nova ships with a variety of field types. So, let’s explore all of the available types and their options:...
$results = $this->addNestedWiths($name, $results); $results[$name] = $constraints; } return $results; } public function get($columns = ['*']) { $builder = $this->applyScopes(); //获取模型时会去加载要预加载的关联模型 if (count($models = $builder->getModels($columns)) > 0) ...
// Laravel pluck an array from nested relationship Eloquent 9 559 Level 2 Kareimovich OP Posted 6 years ago I need to get pathtags and add it to a variable so I can replace it with ['XML','PHP','CSS3'].$Paths= Path::with(['ProgrammingField','pathtags' => function ($q) {$q...
Nested sets orNested Set Modelis a way to effectively store hierarchical data in a relational table. From wikipedia: The nested set model is to number the nodes according to a tree traversal, which visits each node twice, assigning numbers in the order of visiting, and at both visits. This...
Relationship Columns Introduction Setting Up the Eloquent Relationship Simple Select More Complex Selects Nested Relationships Introduction Note: This article is just about relationship columns. For a...