From a72f3dc308f2e4386f73e88af41db919ba0acaf3 Mon Sep 17 00:00:00 2001
From: Jeremy Benoist <jeremy.benoist@gmail.com>
Date: Fri, 23 Dec 2016 09:00:13 +0100
Subject: [PATCH] Fix bad migration for PostreSQL
MIME-Version: 1.0
Content-Type: text/plain; charset=utf8
Content-Transfer-Encoding: 8bit

Queries weren’t executed for PostgreSQL, bad syntax.
---
 .../Version20161001072726.php                 | 76 +++++++++++++++++--
 1 file changed, 68 insertions(+), 8 deletions(-)

diff --git a/app/DoctrineMigrations/Version20161001072726.php b/app/DoctrineMigrations/Version20161001072726.php
index 5ab88555..f6930778 100644
--- a/app/DoctrineMigrations/Version20161001072726.php
+++ b/app/DoctrineMigrations/Version20161001072726.php
@@ -32,22 +32,82 @@ class Version20161001072726 extends AbstractMigration implements ContainerAwareI
         $this->skipIf($this->connection->getDatabasePlatform()->getName() == 'sqlite', 'Migration can only be executed safely on \'mysql\' or \'postgresql\'.');
 
         // remove all FK from entry_tag
-        $query = $this->connection->query("SELECT CONSTRAINT_NAME FROM information_schema.key_column_usage WHERE TABLE_NAME = '".$this->getTable('entry_tag')."' AND CONSTRAINT_NAME LIKE 'FK_%' AND TABLE_SCHEMA = '".$this->connection->getDatabase()."'");
-        $query->execute();
+        switch ($this->connection->getDatabasePlatform()->getName()) {
+            case 'mysql':
+                $query = $this->connection->query("
+                    SELECT CONSTRAINT_NAME
+                    FROM information_schema.key_column_usage
+                    WHERE TABLE_NAME = '".$this->getTable('entry_tag')."' AND CONSTRAINT_NAME LIKE 'FK_%'
+                    AND TABLE_SCHEMA = '".$this->connection->getDatabase()."'"
+                );
+                $query->execute();
 
-        foreach ($query->fetchAll() as $fk) {
-            $this->addSql('ALTER TABLE '.$this->getTable('entry_tag').' DROP FOREIGN KEY '.$fk['CONSTRAINT_NAME']);
+                foreach ($query->fetchAll() as $fk) {
+                    $this->addSql('ALTER TABLE '.$this->getTable('entry_tag').' DROP FOREIGN KEY '.$fk['CONSTRAINT_NAME']);
+                }
+                break;
+
+            case 'postgresql':
+                // http://dba.stackexchange.com/questions/36979/retrieving-all-pk-and-fk
+                $query = $this->connection->query("
+                    SELECT conrelid::regclass AS table_from
+                          ,conname
+                          ,pg_get_constraintdef(c.oid)
+                    FROM   pg_constraint c
+                    JOIN   pg_namespace n ON n.oid = c.connamespace
+                    WHERE  contype = 'f'
+                    AND    conrelid::regclass::text = '".$this->getTable('entry_tag')."'
+                    AND    n.nspname = 'public';"
+                );
+                $query->execute();
+
+                foreach ($query->fetchAll() as $fk) {
+                    $this->addSql('ALTER TABLE '.$this->getTable('entry_tag').' DROP CONSTRAINT '.$fk['conname']);
+                }
+                break;
         }
 
         $this->addSql('ALTER TABLE '.$this->getTable('entry_tag').' ADD CONSTRAINT FK_entry_tag_entry FOREIGN KEY (entry_id) REFERENCES '.$this->getTable('entry').' (id) ON DELETE CASCADE');
         $this->addSql('ALTER TABLE '.$this->getTable('entry_tag').' ADD CONSTRAINT FK_entry_tag_tag FOREIGN KEY (tag_id) REFERENCES '.$this->getTable('tag').' (id) ON DELETE CASCADE');
 
         // remove entry FK from annotation
-        $query = $this->connection->query("SELECT CONSTRAINT_NAME FROM information_schema.key_column_usage WHERE TABLE_NAME = '".$this->getTable('annotation')."' AND CONSTRAINT_NAME LIKE 'FK_%' and COLUMN_NAME = 'entry_id' AND TABLE_SCHEMA = '".$this->connection->getDatabase()."'");
-        $query->execute();
 
-        foreach ($query->fetchAll() as $fk) {
-            $this->addSql('ALTER TABLE '.$this->getTable('annotation').' DROP FOREIGN KEY '.$fk['CONSTRAINT_NAME']);
+        switch ($this->connection->getDatabasePlatform()->getName()) {
+            case 'mysql':
+                $query = $this->connection->query("
+                    SELECT CONSTRAINT_NAME
+                    FROM information_schema.key_column_usage
+                    WHERE TABLE_NAME = '".$this->getTable('annotation')."'
+                    AND CONSTRAINT_NAME LIKE 'FK_%'
+                    AND COLUMN_NAME = 'entry_id'
+                    AND TABLE_SCHEMA = '".$this->connection->getDatabase()."'"
+                );
+                $query->execute();
+
+                foreach ($query->fetchAll() as $fk) {
+                    $this->addSql('ALTER TABLE '.$this->getTable('annotation').' DROP FOREIGN KEY '.$fk['CONSTRAINT_NAME']);
+                }
+                break;
+
+            case 'postgresql':
+                // http://dba.stackexchange.com/questions/36979/retrieving-all-pk-and-fk
+                $query = $this->connection->query("
+                    SELECT conrelid::regclass AS table_from
+                          ,conname
+                          ,pg_get_constraintdef(c.oid)
+                    FROM   pg_constraint c
+                    JOIN   pg_namespace n ON n.oid = c.connamespace
+                    WHERE  contype = 'f'
+                    AND    conrelid::regclass::text = '".$this->getTable('annotation')."'
+                    AND    n.nspname = 'public'
+                    AND    pg_get_constraintdef(c.oid) LIKE '%entry_id%';"
+                );
+                $query->execute();
+
+                foreach ($query->fetchAll() as $fk) {
+                    $this->addSql('ALTER TABLE '.$this->getTable('annotation').' DROP CONSTRAINT '.$fk['conname']);
+                }
+                break;
         }
 
         $this->addSql('ALTER TABLE '.$this->getTable('annotation').' ADD CONSTRAINT FK_annotation_entry FOREIGN KEY (entry_id) REFERENCES '.$this->getTable('entry').' (id) ON DELETE CASCADE');
-- 
2.41.0