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[12.x] Add support for nested array notation within loadMissing #54554

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[12.x] Add support for nested array notation within loadMissing #54554

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ca14b86
add load missing
lioneaglesolutions Feb 11, 2025
1ef2b1e
wording
lioneaglesolutions Feb 11, 2025
3e9f584
style
lioneaglesolutions Feb 11, 2025
47e7293
style
lioneaglesolutions Feb 11, 2025
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36 changes: 35 additions & 1 deletion src/Illuminate/Database/Eloquent/Collection.php
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Original file line number Diff line number Diff line change
Expand Up @@ -221,7 +221,7 @@ public function loadMissing($relations)
$relations = func_get_args();
}

foreach ($relations as $key => $value) {
foreach ($this->prepareLoadMissingRelationships($relations) as $key => $value) {
if (is_numeric($key)) {
$key = $value;
}
Expand All @@ -248,6 +248,40 @@ public function loadMissing($relations)
return $this;
}

/**
* Prepare nested load missing relationships.
*
* @param array $relations
* @param string $prefix
* @return array
*/
protected function prepareLoadMissingRelationships($relations, $prefix = '')
{
$preparedRelationships = [];

foreach ($relations as $key => $value) {
$fullKey = $prefix ? "$prefix.$key" : $key;

// If the value is not an array, it can be used as-is
if (! is_array($value)) {
$preparedRelationships[$fullKey] = $value;
} else {
if (array_values($value) === $value) {
// If the array has a depth of 1, we simply flatten the array
foreach ($value as $subValue) {
$preparedRelationships["$fullKey.$subValue"] = null;
}
} else {
// We now know that the remaining relationships are nested arrays
// so we must prepare them recursively
$preparedRelationships = array_merge($preparedRelationships, $this->prepareLoadMissingRelationships($value, $fullKey));
}
}
}

return $preparedRelationships;
}

/**
* Load a relationship path if it is not already eager loaded.
*
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71 changes: 71 additions & 0 deletions tests/Integration/Database/EloquentCollectionLoadMissingTest.php
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Original file line number Diff line number Diff line change
Expand Up @@ -92,6 +92,77 @@ public function testLoadMissingWithClosure()
$this->assertArrayNotHasKey('post_id', $posts[0]->comments[1]->parent->getAttributes());
}

public function testLoadMissingWithNestedArray()
{
$posts = Post::with('comments')->get();

DB::enableQueryLog();

$posts->loadMissing(['comments' => ['parent']]);

$this->assertCount(1, DB::getQueryLog());
$this->assertTrue($posts[0]->comments[0]->relationLoaded('parent'));
}

public function testLoadMissingWithNestedArrayWithClosure()
{
$posts = Post::with('comments')->get();

DB::enableQueryLog();

$posts->loadMissing(['comments' => ['parent' => function ($query) {
$query->select('id');
}]]);

$this->assertCount(1, DB::getQueryLog());
$this->assertTrue($posts[0]->comments[0]->relationLoaded('parent'));
$this->assertArrayNotHasKey('post_id', $posts[0]->comments[1]->parent->getAttributes());
}

public function testLoadMissingWithMultipleNestedArrays()
{
$users = User::get();
$users->loadMissing([
'posts' => [
'postRelation' => [
'postSubRelations' => [
'postSubSubRelations',
],
],
],
]);

$user = $users->first();
$this->assertEquals(2, $user->posts->count());
$this->assertNull($user->posts[0]->postRelation);
$this->assertInstanceOf(PostRelation::class, $user->posts[1]->postRelation);
$this->assertEquals(1, $user->posts[1]->postRelation->postSubRelations->count());
$this->assertInstanceOf(PostSubRelation::class, $user->posts[1]->postRelation->postSubRelations[0]);
$this->assertEquals(1, $user->posts[1]->postRelation->postSubRelations[0]->postSubSubRelations->count());
$this->assertInstanceOf(PostSubSubRelation::class, $user->posts[1]->postRelation->postSubRelations[0]->postSubSubRelations[0]);
}

public function testLoadMissingWithMultipleNestedArraysCombinedWithDotNotation()
{
$users = User::get();
$users->loadMissing([
'posts' => [
'postRelation' => [
'postSubRelations.postSubSubRelations',
],
],
]);

$user = $users->first();
$this->assertEquals(2, $user->posts->count());
$this->assertNull($user->posts[0]->postRelation);
$this->assertInstanceOf(PostRelation::class, $user->posts[1]->postRelation);
$this->assertEquals(1, $user->posts[1]->postRelation->postSubRelations->count());
$this->assertInstanceOf(PostSubRelation::class, $user->posts[1]->postRelation->postSubRelations[0]);
$this->assertEquals(1, $user->posts[1]->postRelation->postSubRelations[0]->postSubSubRelations->count());
$this->assertInstanceOf(PostSubSubRelation::class, $user->posts[1]->postRelation->postSubRelations[0]->postSubSubRelations[0]);
}

public function testLoadMissingWithDuplicateRelationName()
{
$posts = Post::with('comments')->get();
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