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Aggregate subdocument arrays #918

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Merged
merged 3 commits into from
Oct 7, 2016
Merged

Aggregate subdocument arrays #918

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039458d
add sub document aggregation array functionality
Aug 10, 2016
e615e53
change testSubdocumentArrayAggregate
Aug 13, 2016
408d267
rebase to latest master and fix style ci issues
Sep 1, 2016
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14 changes: 14 additions & 0 deletions src/Jenssegers/Mongodb/Query/Builder.php
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Original file line number Diff line number Diff line change
Expand Up @@ -187,6 +187,7 @@ public function getFresh($columns = [])
// Use MongoDB's aggregation framework when using grouping or aggregation functions.
if ($this->groups or $this->aggregate or $this->paginating) {
$group = [];
$unwinds = [];

// Add grouping columns to the $group part of the aggregation pipeline.
if ($this->groups) {
Expand All @@ -212,6 +213,13 @@ public function getFresh($columns = [])
$function = $this->aggregate['function'];

foreach ($this->aggregate['columns'] as $column) {
// Add unwind if a subdocument array should be aggregated
// column: subarray.price => {$unwind: '$subarray'}
if (count($splitColumns = explode('.*.', $column)) == 2) {
$unwinds[] = $splitColumns[0];
$column = implode('.', $splitColumns);
}

// Translate count into sum.
if ($function == 'count') {
$group['aggregate'] = ['$sum' => 1];
Expand Down Expand Up @@ -241,6 +249,12 @@ public function getFresh($columns = [])
if ($wheres) {
$pipeline[] = ['$match' => $wheres];
}

// apply unwinds for subdocument array aggregation
foreach ($unwinds as $unwind) {
$pipeline[] = ['$unwind' => '$' . $unwind];
}

if ($group) {
$pipeline[] = ['$group' => $group];
}
Expand Down
16 changes: 16 additions & 0 deletions tests/QueryBuilderTest.php
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Expand Up @@ -419,6 +419,22 @@ public function testSubdocumentAggregate()
$this->assertEquals(16.25, DB::collection('items')->avg('amount.hidden'));
}

public function testSubdocumentArrayAggregate()
{
DB::collection('items')->insert([
['name' => 'knife', 'amount' => [['hidden' => 10, 'found' => 3],['hidden' => 5, 'found' => 2]]],
['name' => 'fork', 'amount' => [['hidden' => 35, 'found' => 12],['hidden' => 7, 'found' => 17],['hidden' => 1, 'found' => 19]]],
['name' => 'spoon', 'amount' => [['hidden' => 14, 'found' => 21]]],
['name' => 'teaspoon', 'amount' => []],
]);

$this->assertEquals(72, DB::collection('items')->sum('amount.*.hidden'));
$this->assertEquals(6, DB::collection('items')->count('amount.*.hidden'));
$this->assertEquals(1, DB::collection('items')->min('amount.*.hidden'));
$this->assertEquals(35, DB::collection('items')->max('amount.*.hidden'));
$this->assertEquals(12, DB::collection('items')->avg('amount.*.hidden'));
}

public function testUpsert()
{
DB::collection('items')->where('name', 'knife')
Expand Down