Merge pull request #1966 from alcaeus/fix-duplicate-embedded-index-name

Fix embedding documents containing named indexes

docs/en/reference/annotations-reference.rst

@@ -794,7 +794,8 @@ Optional attributes:
     respectively. Special index types (e.g. "2dsphere") should be specified as
     strings. This is required when `@Index`_ is used at the class level.
 -
-    options - Options for creating the index
+    options - Options for creating the index. Options are documented in the
+    :ref:`indexes chapter <indees>`.
 
 The ``keys`` and ``options`` attributes correspond to the arguments for
 `MongoCollection::createIndex() <http://php.net/manual/en/mongocollection.createindex.php>`_.
@@ -827,6 +828,15 @@ If you are creating a single-field index, you can simply specify an `@Index`_ or
     /** @Field(type="string") @UniqueIndex */
     private $username;
 
+.. note::
+
+    If the ``name`` option is specified on an index in an embedded document, it
+    will be prefixed with the embedded field path before creating the index.
+    This is necessary to avoid index name conflict when the same document is
+    embedded multiple times in a single collection. Prefixing of the index name
+    can cause errors due to excessive index name length. In this case, try
+    shortening the index name or embedded field path.
+
 @Indexes
 --------
 

docs/en/reference/indexes.rst

@@ -335,6 +335,15 @@ Also, for your convenience you can create the indexes for your mapped documents
     unless you specify a discriminator map for the :ref:`embed-one <embed_one>`
     or :ref:`embed-many <embed_many>` relationship.
 
+.. note::
+
+    If the ``name`` option is specified on an index in an embedded document, it
+    will be prefixed with the embedded field path before creating the index.
+    This is necessary to avoid index name conflict when the same document is
+    embedded multiple times in a single collection. Prefixing of the index name
+    can cause errors due to excessive index name length. In this case, try
+    shortening the index name or embedded field path.
+
 Geospatial Indexing
 -------------------
 

lib/Doctrine/ODM/MongoDB/SchemaManager.php

@@ -22,6 +22,7 @@
 use Doctrine\ODM\MongoDB\Mapping\ClassMetadata;
 use Doctrine\ODM\MongoDB\Mapping\ClassMetadataFactory;
 use Doctrine\ODM\MongoDB\Mapping\ClassMetadataInfo;
+use function sprintf;
 
 class SchemaManager
 {
@@ -173,18 +174,25 @@ private function doGetDocumentIndexes($documentName, array &$visited)
                 } else {
                     continue;
                 }
+
                 foreach ($possibleEmbeds as $embed) {
                     if (isset($embeddedDocumentIndexes[$embed])) {
                         $embeddedIndexes = $embeddedDocumentIndexes[$embed];
                     } else {
                         $embeddedIndexes = $this->doGetDocumentIndexes($embed, $visited);
                         $embeddedDocumentIndexes[$embed] = $embeddedIndexes;
                     }
+
                     foreach ($embeddedIndexes as $embeddedIndex) {
                         foreach ($embeddedIndex['keys'] as $key => $value) {
                             $embeddedIndex['keys'][$fieldMapping['name'] . '.' . $key] = $value;
                             unset($embeddedIndex['keys'][$key]);
                         }
+
+                        if (isset($embeddedIndex['options']['name'])) {
+                            $embeddedIndex['options']['name'] = sprintf('%s_%s', $fieldMapping['name'], $embeddedIndex['options']['name']);
+                        }
+
                         $indexes[] = $embeddedIndex;
                     }
                 }
@@ -195,12 +203,15 @@ private function doGetDocumentIndexes($documentName, array &$visited)
                         if ($key == $fieldMapping['name']) {
                             $key = ClassMetadataInfo::getReferenceFieldName($fieldMapping['storeAs'], $key);
                         }
+
                         $newKeys[$key] = $v;
                     }
+
                     $indexes[$idx]['keys'] = $newKeys;
                 }
             }
         }
+
         return $indexes;
     }
 

tests/Doctrine/ODM/MongoDB/Tests/Functional/Ticket/GH1344Test.php

@@ -0,0 +1,88 @@
+<?php
+
+namespace Doctrine\ODM\MongoDB\Tests\Functional\Ticket;
+
+use Doctrine\ODM\MongoDB\Mapping\Annotations as ODM;
+use Doctrine\ODM\MongoDB\Tests\BaseTest;
+use MongoResultException;
+
+class GH1344Test extends BaseTest
+{
+    public function testGeneratingIndexesDoesNotThrowException()
+    {
+        $indexes = $this->dm->getSchemaManager()->getDocumentIndexes(GH1344Main::class);
+        self::assertCount(4, $indexes);
+        self::assertSame('embedded1_embedded', $indexes[0]['options']['name']);
+        self::assertSame('embedded1_embedded_nested', $indexes[1]['options']['name']);
+        self::assertSame('embedded2_embedded', $indexes[2]['options']['name']);
+        self::assertSame('embedded2_embedded_nested', $indexes[3]['options']['name']);
+
+        $this->dm->getSchemaManager()->ensureDocumentIndexes(GH1344Main::class);
+    }
+
+    public function testGeneratingIndexesWithTooLongIndexNameThrowsException()
+    {
+        // Ensure that at least the beginning of the index name is contained in
+        // the exception message. This can vary between driver/server versions.
+        $this->expectException(MongoResultException::class);
+        $this->expectExceptionMessageRegExp('#GH1344TooLongIndexName.\$embedded1_this_is_a_really_long_name_that#');
+
+        $this->dm->getSchemaManager()->ensureDocumentIndexes(GH1344TooLongIndexName::class);
+    }
+}
+
+/** @ODM\Document */
+class GH1344Main
+{
+    /** @ODM\Id */
+    public $id;
+
+    /** @ODM\EmbedOne(targetDocument=GH1344Embedded::class) */
+    public $embedded1;
+
+    /** @ODM\EmbedOne(targetDocument=GH1344Embedded::class) */
+    public $embedded2;
+}
+
+/**
+ * @ODM\EmbeddedDocument
+ * @ODM\Index(keys={"property"="asc"}, name="embedded")
+ */
+class GH1344Embedded
+{
+    /** @ODM\Field */
+    public $property;
+
+    /** @ODM\EmbedOne(targetDocument=GH1344EmbeddedNested::class) */
+    public $embedded;
+}
+
+/**
+ * @ODM\EmbeddedDocument
+ * @ODM\Index(keys={"property"="asc"}, name="nested")
+ */
+class GH1344EmbeddedNested
+{
+    /** @ODM\Field */
+    public $property;
+}
+
+/** @ODM\Document */
+class GH1344TooLongIndexName
+{
+    /** @ODM\Id */
+    public $id;
+
+    /** @ODM\EmbedOne(targetDocument=GH1344TooLongIndexNameEmbedded::class) */
+    public $embedded1;
+}
+
+/**
+ * @ODM\EmbeddedDocument
+ * @ODM\Index(keys={"property"="asc"}, name="this_is_a_really_long_name_that_will_cause_problems_for_whoever_tries_to_use_it_whether_in_an_embedded_field_or_not")
+ */
+class GH1344TooLongIndexNameEmbedded
+{
+    /** @ODM\Field */
+    public $property;
+}