diff --git a/lib/Doctrine/ORM/Mapping/ClassMetadataInfo.php b/lib/Doctrine/ORM/Mapping/ClassMetadataInfo.php
index a52bdb8a1..826f986c3 100644
--- a/lib/Doctrine/ORM/Mapping/ClassMetadataInfo.php
+++ b/lib/Doctrine/ORM/Mapping/ClassMetadataInfo.php
@@ -1224,7 +1224,9 @@ class ClassMetadataInfo implements ClassMetadata
             foreach ($mapping['joinColumns'] as $key => &$joinColumn) {
                 if ($mapping['type'] === self::ONE_TO_ONE && ! $this->isInheritanceTypeSingleTable()) {
                     if (count($mapping['joinColumns']) == 1) {
-                        $joinColumn['unique'] = true;
+                        if (! isset($mapping['id']) || ! $mapping['id']) {
+                            $joinColumn['unique'] = true;
+                        }
                     } else {
                         $uniqueContraintColumns[] = $joinColumn['name'];
                     }
diff --git a/lib/Doctrine/ORM/Mapping/Driver/DatabaseDriver.php b/lib/Doctrine/ORM/Mapping/Driver/DatabaseDriver.php
index 8d6136ac5..bcbdbd500 100644
--- a/lib/Doctrine/ORM/Mapping/Driver/DatabaseDriver.php
+++ b/lib/Doctrine/ORM/Mapping/Driver/DatabaseDriver.php
@@ -192,12 +192,13 @@ class DatabaseDriver implements Driver
         $fieldMappings = array();
         foreach ($columns as $column) {
             $fieldMapping = array();
-            if ($primaryKeyColumns && in_array($column->getName(), $primaryKeyColumns)) {
-                $fieldMapping['id'] = true;
-            } else if (in_array($column->getName(), $allForeignKeyColumns)) {
+            
+            if (in_array($column->getName(), $allForeignKeyColumns)) {
                 continue;
+            } else if ($primaryKeyColumns && in_array($column->getName(), $primaryKeyColumns)) {
+                $fieldMapping['id'] = true;
             }
-
+            
             $fieldMapping['fieldName'] = $this->getFieldNameForColumn($tableName, $column->getName(), false);
             $fieldMapping['columnName'] = $column->getName();
             $fieldMapping['type'] = strtolower((string) $column->getType());
@@ -298,13 +299,23 @@ class DatabaseDriver implements Driver
             $associationMapping['fieldName'] = $this->getFieldNameForColumn($tableName, $localColumn, true);
             $associationMapping['targetEntity'] = $this->getClassNameForTable($foreignTable);
 
+            if ($primaryKeyColumns && in_array($localColumn, $primaryKeyColumns)) {
+                $associationMapping['id'] = true;
+            }
+
             for ($i = 0; $i < count($cols); $i++) {
                 $associationMapping['joinColumns'][] = array(
                     'name' => $cols[$i],
                     'referencedColumnName' => $fkCols[$i],
                 );
             }
-            $metadata->mapManyToOne($associationMapping);
+            
+            //Here we need to check if $cols are the same as $primaryKeyColums
+            if (!array_diff($cols,$primaryKeyColumns)) {
+                $metadata->mapOneToOne($associationMapping);
+            } else {
+                $metadata->mapManyToOne($associationMapping);
+            }
         }
     }
 
diff --git a/lib/Doctrine/ORM/Tools/EntityGenerator.php b/lib/Doctrine/ORM/Tools/EntityGenerator.php
index 681892818..a6d52175a 100644
--- a/lib/Doctrine/ORM/Tools/EntityGenerator.php
+++ b/lib/Doctrine/ORM/Tools/EntityGenerator.php
@@ -889,6 +889,14 @@ public function <methodName>()
 
         if ($this->_generateAnnotations) {
             $lines[] = $this->_spaces . ' *';
+            
+            if (isset($associationMapping['id']) && $associationMapping['id']) {
+                $lines[] = $this->_spaces . ' * @' . $this->_annotationsPrefix . 'Id';
+            
+                if ($generatorType = $this->_getIdGeneratorTypeString($metadata->generatorType)) {
+                    $lines[] = $this->_spaces . ' * @' . $this->_annotationsPrefix . 'GeneratedValue(strategy="' . $generatorType . '")';
+                }
+            }
 
             $type = null;
             switch ($associationMapping['type']) {