fix!: SchemaBuilder::getForeignKeys was returning incorrect values

Author: taka-oyama

src/Query/Processor.php

@@ -122,14 +122,22 @@ public function processIndexes($results)
     }
 
     /**
-     * {@inheritDoc}
-     * @param array{key_name: string}&array<string, mixed> $results
-     * @return array<array-key, string>
+     * @inheritDoc
      */
     public function processForeignKeys($results)
     {
         return array_map(function ($result) {
-            return ((object) $result)->key_name;
+            $result = (object) $result;
+
+            return [
+                'name' => $result->name,
+                'columns' => explode(',', $result->columns),
+                'foreign_schema' => $result->foreign_schema,
+                'foreign_table' => $result->foreign_table,
+                'foreign_columns' => explode(',', $result->foreign_columns),
+                'on_update' => strtolower($result->on_update),
+                'on_delete' => strtolower($result->on_delete),
+            ];
         }, $results);
     }
 }

src/Schema/Grammar.php

@@ -81,10 +81,26 @@ public function compileIndexes($table)
      */
     public function compileForeignKeys($table)
     {
-        return sprintf(
-            'select constraint_name as `key_name` from information_schema.table_constraints where constraint_type = "FOREIGN KEY" and table_schema = \'\' and table_name = %s',
-            $this->quoteString($table),
-        );
+        $schema ??= '';
+
+        return implode(' ', [
+            'select',
+            implode(', ', [
+                'kc.constraint_name as `name`',
+                'string_agg(kc.column_name) as `columns`',
+                'cc.table_schema as `foreign_schema`',
+                'cc.table_name as `foreign_table`',
+                'string_agg(cc.column_name) as `foreign_columns`',
+                'rc.update_rule as `on_update`',
+                'rc.delete_rule as `on_delete`',
+            ]),
+            'from information_schema.key_column_usage kc',
+            'join information_schema.referential_constraints rc on kc.constraint_name = rc.constraint_name',
+            'join information_schema.constraint_column_usage cc on kc.constraint_name = cc.constraint_name',
+            'where kc.table_schema = "' . $schema . '"',
+            'and kc.table_name = ' . $this->quoteString($table),
+            'group by kc.constraint_name, cc.table_schema, cc.table_name, rc.update_rule, rc.delete_rule'
+        ]);
     }
 
     /**

tests/Schema/BuilderTestLast.php

@@ -305,6 +305,36 @@ public function test_getIndexListing(): void
         ], $sb->getIndexListing($table));
     }
 
+    public function test_getForeignKeys(): void
+    {
+        $conn = $this->getDefaultConnection();
+        $sb = $conn->getSchemaBuilder();
+        $table1 = $this->generateTableName(class_basename(__CLASS__). '_1');
+        $sb->create($table1, function (Blueprint $table) {
+            $table->uuid('id')->primary();
+            $table->uuid('something');
+            $table->index('something');
+        });
+
+        $table2 = $this->generateTableName(class_basename(__CLASS__). '_2');
+        $sb->create($table2, function (Blueprint $table) use ($table1) {
+            $table->uuid('table2_id')->primary();
+            $table->uuid('other_id');
+            $table->index('other_id');
+            $table->foreign('other_id')->references('id')->on($table1);
+        });
+
+        $this->assertSame([[
+            'name' => strtolower($table2) . '_other_id_foreign',
+            'columns' => ['other_id'],
+            'foreign_schema' => '',
+            'foreign_table' => $table1,
+            'foreign_columns' => ['id'],
+            'on_update' => "no action",
+            'on_delete' => "no action",
+        ]], $sb->getForeignKeys($table2));
+    }
+
     public function test_dropAllTables(): void
     {
         $conn = $this->getDefaultConnection();