Port changes from cakephp/phinx#2322

docs/en/writing-migrations.rst

@@ -881,6 +881,7 @@ Option     Description
 update     set an action to be triggered when the row is updated
 delete     set an action to be triggered when the row is deleted
 constraint set a name to be used by foreign key constraint
+deferrable define deferred constraint application (postgres only)
 ========== ===========
 
 You can pass one or more of these options to any column with the optional

src/Db/Adapter/PostgresAdapter.php

@@ -1329,6 +1329,9 @@ protected function getForeignKeySqlDefinition(ForeignKey $foreignKey, string $ta
         if ($foreignKey->getOnUpdate()) {
             $def .= " ON UPDATE {$foreignKey->getOnUpdate()}";
         }
+        if ($foreignKey->getDeferrableMode()) {
+            $def .= " {$foreignKey->getDeferrableMode()}";
+        }
 
         return $def;
     }

src/Db/Table/ForeignKey.php

@@ -17,11 +17,14 @@ class ForeignKey
     public const RESTRICT = 'RESTRICT';
     public const SET_NULL = 'SET NULL';
     public const NO_ACTION = 'NO ACTION';
+    public const DEFERRED = 'DEFERRABLE INITIALLY DEFERRED';
+    public const IMMEDIATE = 'DEFERRABLE INITIALLY IMMEDIATE';
+    public const NOT_DEFERRED = 'NOT DEFERRABLE';
 
     /**
      * @var array<string>
      */
-    protected static array $validOptions = ['delete', 'update', 'constraint'];
+    protected static array $validOptions = ['delete', 'update', 'constraint', 'deferrable'];
 
     /**
      * @var string[]
@@ -53,6 +56,11 @@ class ForeignKey
      */
     protected ?string $constraint = null;
 
+    /**
+     * @var string|null
+     */
+    protected ?string $deferrableMode = null;
+
     /**
      * Sets the foreign key columns.
      *
@@ -191,6 +199,27 @@ public function getConstraint(): ?string
         return $this->constraint;
     }
 
+    /**
+     * Sets deferrable mode for the foreign key.
+     *
+     * @param string $deferrableMode Constraint
+     * @return $this
+     */
+    public function setDeferrableMode(string $deferrableMode)
+    {
+        $this->deferrableMode = $this->normalizeDeferrable($deferrableMode);
+
+        return $this;
+    }
+
+    /**
+     * Gets deferrable mode for the foreign key.
+     */
+    public function getDeferrableMode(): ?string
+    {
+        return $this->deferrableMode;
+    }
+
     /**
      * Utility method that maps an array of index options to this objects methods.
      *
@@ -210,6 +239,8 @@ public function setOptions(array $options)
                 $this->setOnDelete($value);
             } elseif ($option === 'update') {
                 $this->setOnUpdate($value);
+            } elseif ($option === 'deferrable') {
+                $this->setDeferrableMode($value);
             } else {
                 $method = 'set' . ucfirst($option);
                 $this->$method($value);
@@ -235,4 +266,29 @@ protected function normalizeAction(string $action): string
 
         return constant($constantName);
     }
+
+    /**
+     * From passed value checks if it's correct and fixes if needed
+     *
+     * @param string $deferrable Deferrable
+     * @throws \InvalidArgumentException
+     * @return string
+     */
+    protected function normalizeDeferrable(string $deferrable): string
+    {
+        $mapping = [
+            'DEFERRED' => ForeignKey::DEFERRED,
+            'IMMEDIATE' => ForeignKey::IMMEDIATE,
+            'NOT DEFERRED' => ForeignKey::NOT_DEFERRED,
+            ForeignKey::DEFERRED => ForeignKey::DEFERRED,
+            ForeignKey::IMMEDIATE => ForeignKey::IMMEDIATE,
+            ForeignKey::NOT_DEFERRED => ForeignKey::NOT_DEFERRED,
+        ];
+        $normalized = strtoupper(str_replace('_', ' ', $deferrable));
+        if (array_key_exists($normalized, $mapping)) {
+            return $mapping[$normalized];
+        }
+
+        throw new InvalidArgumentException('Unknown deferrable passed: ' . $deferrable);
+    }
 }

tests/TestCase/Db/Table/ForeignKeyTest.php

@@ -97,4 +97,41 @@ public function testSetOptionThrowsExceptionIfOptionIsNotString()
 
         $this->fk->setOptions(['update']);
     }
+
+    #[DataProvider('deferrableProvider')]
+    public function testDeferrableCanBeSetThroughSetters(string $dirtyValue, string $valueOfConstant): void
+    {
+        $this->fk->setDeferrableMode($dirtyValue);
+        $this->assertEquals($valueOfConstant, $this->fk->getDeferrableMode());
+    }
+
+    #[DataProvider('deferrableProvider')]
+    public function testDeferrableCanBeSetThroughOptions(string $dirtyValue, string $valueOfConstant): void
+    {
+        $this->fk->setOptions([
+            'deferrable' => $dirtyValue,
+        ]);
+        $this->assertEquals($valueOfConstant, $this->fk->getDeferrableMode());
+    }
+
+    public static function deferrableProvider(): array
+    {
+        return [
+            ['DEFERRED', ForeignKey::DEFERRED],
+            ['IMMEDIATE', ForeignKey::IMMEDIATE],
+            ['NOT_DEFERRED', ForeignKey::NOT_DEFERRED],
+            ['Deferred', ForeignKey::DEFERRED],
+            ['Immediate', ForeignKey::IMMEDIATE],
+            ['Not_deferred', ForeignKey::NOT_DEFERRED],
+            [ForeignKey::DEFERRED, ForeignKey::DEFERRED],
+            [ForeignKey::IMMEDIATE, ForeignKey::IMMEDIATE],
+            [ForeignKey::NOT_DEFERRED, ForeignKey::NOT_DEFERRED],
+        ];
+    }
+
+    public function testThrowsErrorForInvalidDeferrableValue(): void
+    {
+        $this->expectException(InvalidArgumentException::class);
+        $this->fk->setDeferrableMode('invalid_value');
+    }
 }