[10.x] Fix cursor paginate with union and column alias (#50882)

* Cursor paginate uses incorrect column name for where on union

* Set the right column names for the cursor on the unions

* Add dedicated test to test correct column alias on union cursor paginate

* Add eloquent test for cursor pagination with union and multiple aliases

* Use correct column name in cursor where clause

Author: thijsvdanker

src/Illuminate/Database/Concerns/BuildsQueries.php

@@ -382,11 +382,11 @@ protected function paginateUsingCursor($perPage, $columns = ['*'], $cursorName =
             // Reset the union bindings so we can add the cursor where in the correct position...
             $this->setBindings([], 'union');
 
-            $addCursorConditions = function (self $builder, $previousColumn, $i) use (&$addCursorConditions, $cursor, $orders) {
+            $addCursorConditions = function (self $builder, $previousColumn, $originalColumn, $i) use (&$addCursorConditions, $cursor, $orders) {
                 $unionBuilders = $builder->getUnionBuilders();
 
                 if (! is_null($previousColumn)) {
-                    $originalColumn = $this->getOriginalColumnNameForCursorPagination($this, $previousColumn);
+                    $originalColumn ??= $this->getOriginalColumnNameForCursorPagination($this, $previousColumn);
 
                     $builder->where(
                         Str::contains($originalColumn, ['(', ')']) ? new Expression($originalColumn) : $originalColumn,
@@ -396,7 +396,7 @@ protected function paginateUsingCursor($perPage, $columns = ['*'], $cursorName =
 
                     $unionBuilders->each(function ($unionBuilder) use ($previousColumn, $cursor) {
                         $unionBuilder->where(
-                            $this->getOriginalColumnNameForCursorPagination($this, $previousColumn),
+                            $this->getOriginalColumnNameForCursorPagination($unionBuilder, $previousColumn),
                             '=',
                             $cursor->parameter($previousColumn)
                         );
@@ -417,24 +417,25 @@ protected function paginateUsingCursor($perPage, $columns = ['*'], $cursorName =
                     );
 
                     if ($i < $orders->count() - 1) {
-                        $secondBuilder->orWhere(function (self $thirdBuilder) use ($addCursorConditions, $column, $i) {
-                            $addCursorConditions($thirdBuilder, $column, $i + 1);
+                        $secondBuilder->orWhere(function (self $thirdBuilder) use ($addCursorConditions, $column, $originalColumn, $i) {
+                            $addCursorConditions($thirdBuilder, $column, $originalColumn, $i + 1);
                         });
                     }
 
                     $unionBuilders->each(function ($unionBuilder) use ($column, $direction, $cursor, $i, $orders, $addCursorConditions) {
                         $unionWheres = $unionBuilder->getRawBindings()['where'];
 
-                        $unionBuilder->where(function ($unionBuilder) use ($column, $direction, $cursor, $i, $orders, $addCursorConditions, $unionWheres) {
+                        $originalColumn = $this->getOriginalColumnNameForCursorPagination($unionBuilder, $column);
+                        $unionBuilder->where(function ($unionBuilder) use ($column, $direction, $cursor, $i, $orders, $addCursorConditions, $originalColumn, $unionWheres) {
                             $unionBuilder->where(
-                                $this->getOriginalColumnNameForCursorPagination($this, $column),
+                                $originalColumn,
                                 $direction === 'asc' ? '>' : '<',
                                 $cursor->parameter($column)
                             );
 
                             if ($i < $orders->count() - 1) {
-                                $unionBuilder->orWhere(function (self $fourthBuilder) use ($addCursorConditions, $column, $i) {
-                                    $addCursorConditions($fourthBuilder, $column, $i + 1);
+                                $unionBuilder->orWhere(function (self $fourthBuilder) use ($addCursorConditions, $column, $originalColumn, $i) {
+                                    $addCursorConditions($fourthBuilder, $column, $originalColumn, $i + 1);
                                 });
                             }
 
@@ -445,7 +446,7 @@ protected function paginateUsingCursor($perPage, $columns = ['*'], $cursorName =
                 });
             };
 
-            $addCursorConditions($this, null, 0);
+            $addCursorConditions($this, null, null, 0);
         }
 
         $this->limit($perPage + 1);

tests/Database/DatabaseQueryBuilderTest.php

@@ -5276,7 +5276,7 @@ public function testCursorPaginateWithUnionWheres()
 
         $builder->shouldReceive('get')->once()->andReturnUsing(function () use ($builder, $results, $ts) {
             $this->assertEquals(
-                '(select "id", "start_time" as "created_at", \'video\' as type from "videos" where ("start_time" > ?)) union (select "id", "created_at", \'news\' as type from "news" where ("start_time" > ?)) order by "created_at" asc limit 17',
+                '(select "id", "start_time" as "created_at", \'video\' as type from "videos" where ("start_time" > ?)) union (select "id", "created_at", \'news\' as type from "news" where ("created_at" > ?)) order by "created_at" asc limit 17',
                 $builder->toSql());
             $this->assertEquals([$ts], $builder->bindings['where']);
             $this->assertEquals([$ts], $builder->bindings['union']);
@@ -5325,7 +5325,7 @@ public function testCursorPaginateWithMultipleUnionsAndMultipleWheres()
 
         $builder->shouldReceive('get')->once()->andReturnUsing(function () use ($builder, $results, $ts) {
             $this->assertEquals(
-                '(select "id", "start_time" as "created_at", \'video\' as type from "videos" where ("start_time" > ?)) union (select "id", "created_at", \'news\' as type from "news" where "extra" = ? and ("start_time" > ?)) union (select "id", "created_at", \'podcast\' as type from "podcasts" where "extra" = ? and ("start_time" > ?)) order by "created_at" asc limit 17',
+                '(select "id", "start_time" as "created_at", \'video\' as type from "videos" where ("start_time" > ?)) union (select "id", "created_at", \'news\' as type from "news" where "extra" = ? and ("created_at" > ?)) union (select "id", "created_at", \'podcast\' as type from "podcasts" where "extra" = ? and ("created_at" > ?)) order by "created_at" asc limit 17',
                 $builder->toSql());
             $this->assertEquals([$ts], $builder->bindings['where']);
             $this->assertEquals(['first', $ts, 'second', $ts], $builder->bindings['union']);
@@ -5422,7 +5422,7 @@ public function testCursorPaginateWithUnionWheresWithRawOrderExpression()
 
         $builder->shouldReceive('get')->once()->andReturnUsing(function () use ($builder, $results, $ts) {
             $this->assertEquals(
-                '(select "id", "is_published", "start_time" as "created_at", \'video\' as type from "videos" where "is_published" = ? and ("start_time" > ?)) union (select "id", "is_published", "created_at", \'news\' as type from "news" where "is_published" = ? and ("start_time" > ?)) order by case when (id = 3 and type="news" then 0 else 1 end), "created_at" asc limit 17',
+                '(select "id", "is_published", "start_time" as "created_at", \'video\' as type from "videos" where "is_published" = ? and ("start_time" > ?)) union (select "id", "is_published", "created_at", \'news\' as type from "news" where "is_published" = ? and ("created_at" > ?)) order by case when (id = 3 and type="news" then 0 else 1 end), "created_at" asc limit 17',
                 $builder->toSql());
             $this->assertEquals([true, $ts], $builder->bindings['where']);
             $this->assertEquals([true, $ts], $builder->bindings['union']);
@@ -5469,7 +5469,7 @@ public function testCursorPaginateWithUnionWheresReverseOrder()
 
         $builder->shouldReceive('get')->once()->andReturnUsing(function () use ($builder, $results, $ts) {
             $this->assertEquals(
-                '(select "id", "start_time" as "created_at", \'video\' as type from "videos" where ("start_time" < ?)) union (select "id", "created_at", \'news\' as type from "news" where ("start_time" < ?)) order by "created_at" desc limit 17',
+                '(select "id", "start_time" as "created_at", \'video\' as type from "videos" where ("start_time" < ?)) union (select "id", "created_at", \'news\' as type from "news" where ("created_at" < ?)) order by "created_at" desc limit 17',
                 $builder->toSql());
             $this->assertEquals([$ts], $builder->bindings['where']);
             $this->assertEquals([$ts], $builder->bindings['union']);
@@ -5516,7 +5516,7 @@ public function testCursorPaginateWithUnionWheresMultipleOrders()
 
         $builder->shouldReceive('get')->once()->andReturnUsing(function () use ($builder, $results, $ts) {
             $this->assertEquals(
-                '(select "id", "start_time" as "created_at", \'video\' as type from "videos" where ("start_time" < ? or ("start_time" = ? and ("id" > ?)))) union (select "id", "created_at", \'news\' as type from "news" where ("start_time" < ? or ("start_time" = ? and ("id" > ?)))) order by "created_at" desc, "id" asc limit 17',
+                '(select "id", "start_time" as "created_at", \'video\' as type from "videos" where ("start_time" < ? or ("start_time" = ? and ("id" > ?)))) union (select "id", "created_at", \'news\' as type from "news" where ("created_at" < ? or ("created_at" = ? and ("id" > ?)))) order by "created_at" desc, "id" asc limit 17',
                 $builder->toSql());
             $this->assertEquals([$ts, $ts, 1], $builder->bindings['where']);
             $this->assertEquals([$ts, $ts, 1], $builder->bindings['union']);
@@ -5537,6 +5537,55 @@ public function testCursorPaginateWithUnionWheresMultipleOrders()
         ]), $result);
     }
 
+    public function testCursorPaginateWithUnionWheresAndAliassedOrderColumns()
+    {
+        $ts = now()->toDateTimeString();
+
+        $perPage = 16;
+        $columns = ['test'];
+        $cursorName = 'cursor-name';
+        $cursor = new Cursor(['created_at' => $ts]);
+        $builder = $this->getMockQueryBuilder();
+        $builder->select('id', 'start_time as created_at')->selectRaw("'video' as type")->from('videos');
+        $builder->union($this->getBuilder()->select('id', 'created_at')->selectRaw("'news' as type")->from('news'));
+        $builder->union($this->getBuilder()->select('id', 'init_at as created_at')->selectRaw("'podcast' as type")->from('podcasts'));
+        $builder->orderBy('created_at');
+
+        $builder->shouldReceive('newQuery')->andReturnUsing(function () use ($builder) {
+            return new Builder($builder->connection, $builder->grammar, $builder->processor);
+        });
+
+        $path = 'http://foo.bar?cursor='.$cursor->encode();
+
+        $results = collect([
+            ['id' => 1, 'created_at' => now(), 'type' => 'video'],
+            ['id' => 2, 'created_at' => now(), 'type' => 'news'],
+            ['id' => 3, 'created_at' => now(), 'type' => 'podcast'],
+        ]);
+
+        $builder->shouldReceive('get')->once()->andReturnUsing(function () use ($builder, $results, $ts) {
+            $this->assertEquals(
+                '(select "id", "start_time" as "created_at", \'video\' as type from "videos" where ("start_time" > ?)) union (select "id", "created_at", \'news\' as type from "news" where ("created_at" > ?)) union (select "id", "init_at" as "created_at", \'podcast\' as type from "podcasts" where ("init_at" > ?)) order by "created_at" asc limit 17',
+                $builder->toSql());
+            $this->assertEquals([$ts], $builder->bindings['where']);
+            $this->assertEquals([$ts, $ts], $builder->bindings['union']);
+
+            return $results;
+        });
+
+        Paginator::currentPathResolver(function () use ($path) {
+            return $path;
+        });
+
+        $result = $builder->cursorPaginate($perPage, $columns, $cursorName, $cursor);
+
+        $this->assertEquals(new CursorPaginator($results, $perPage, $cursor, [
+            'path' => $path,
+            'cursorName' => $cursorName,
+            'parameters' => ['created_at'],
+        ]), $result);
+    }
+
     public function testWhereExpression()
     {
         $builder = $this->getBuilder();

tests/Integration/Database/EloquentCursorPaginateTest.php

@@ -21,6 +21,7 @@ protected function afterRefreshingDatabase()
 
         Schema::create('test_users', function ($table) {
             $table->increments('id');
+            $table->string('name')->nullable();
             $table->timestamps();
         });
     }
@@ -195,6 +196,32 @@ public function testPaginationWithMultipleUnionAndMultipleWhereClauses()
         $this->assertEquals('Post B', current($result->items())->title, 'Expect the paginated query would return `Post B`');
     }
 
+    public function testPaginationWithMultipleAliases()
+    {
+        TestUser::create(['name' => 'A (user)']);
+        TestUser::create(['name' => 'C (user)']);
+
+        TestPost::create(['title' => 'B (post)']);
+        TestPost::create(['title' => 'D (post)']);
+
+        $table1 = TestPost::select(['title as alias']);
+        $table2 = TestUser::select(['name as alias']);
+
+        $columns = ['alias'];
+        $cursorName = 'cursor-name';
+        $cursor = new Cursor(['alias' => 'A (user)']);
+
+        $result = $table1->toBase()
+            ->union($table2->toBase())
+            ->orderBy('alias', 'asc')
+            ->cursorPaginate(1, $columns, $cursorName, $cursor);
+
+        $this->assertSame(['alias'], $result->getOptions()['parameters']);
+
+        $this->assertCount(1, $result->items(), 'Expect cursor paginated query should have 1 result');
+        $this->assertEquals('B (post)', current($result->items())->alias, 'Expect the paginated query would return `B (post)`');
+    }
+
     public function testPaginationWithAliasedOrderBy()
     {
         for ($i = 1; $i <= 6; $i++) {