Add methods to ALTER TABLE with IF EXISTS

Author: natanfelles

src/Definition/AlterTable.php

@@ -237,6 +237,12 @@ public function dropColumn(string $name, bool $ifExists = false) : static
         return $this;
     }
 
+    public function dropColumnIfExists(string $name) : static
+    {
+        $this->sql['drop_columns'][$name] = true;
+        return $this;
+    }
+
     protected function renderDropColumns() : ?string
     {
         if ( ! isset($this->sql['drop_columns'])) {
@@ -271,6 +277,12 @@ public function dropKey(string $name, bool $ifExists = false) : static
         return $this;
     }
 
+    public function dropKeyIfExists(string $name) : static
+    {
+        $this->sql['drop_keys'][$name] = true;
+        return $this;
+    }
+
     protected function renderDropKeys() : ?string
     {
         if ( ! isset($this->sql['drop_keys'])) {
@@ -291,6 +303,12 @@ public function dropForeignKey(string $name, bool $ifExists = false) : static
         return $this;
     }
 
+    public function dropForeignKeyIfExists(string $name) : static
+    {
+        $this->sql['drop_foreign_keys'][$name] = true;
+        return $this;
+    }
+
     protected function renderDropForeignKeys() : ?string
     {
         if ( ! isset($this->sql['drop_foreign_keys'])) {
@@ -311,6 +329,12 @@ public function dropConstraint(string $name, bool $ifExists = false) : static
         return $this;
     }
 
+    public function dropConstraintIfExists(string $name) : static
+    {
+        $this->sql['drop_constraints'][$name] = true;
+        return $this;
+    }
+
     protected function renderDropConstraints() : ?string
     {
         if ( ! isset($this->sql['drop_constraints'])) {

tests/Definition/AlterTableTest.php

@@ -91,6 +91,15 @@ public function testModify() : void
         );
     }
 
+    public function testDropColumnIfExists() : void
+    {
+        $alterTable = $this->alterTable->table('t1')->dropColumnIfExists('foo');
+        self::assertSame(
+            "ALTER TABLE `t1`\n DROP COLUMN IF EXISTS `foo`",
+            $alterTable->sql()
+        );
+    }
+
     public function testDropColumns() : void
     {
         $alterTable = $this->alterTable->table('t1')->dropColumn('foo');
@@ -114,6 +123,15 @@ public function testDropPrimaryKey() : void
         );
     }
 
+    public function testDropKeyIfExists() : void
+    {
+        $alterTable = $this->alterTable->table('t1')->dropKeyIfExists('foo');
+        self::assertSame(
+            "ALTER TABLE `t1`\n DROP KEY IF EXISTS `foo`",
+            $alterTable->sql()
+        );
+    }
+
     public function testDropKeys() : void
     {
         $alterTable = $this->alterTable->table('t1')->dropKey('foo');
@@ -128,6 +146,15 @@ public function testDropKeys() : void
         );
     }
 
+    public function testDropForeignKeyIfExists() : void
+    {
+        $alterTable = $this->alterTable->table('t1')->dropForeignKeyIfExists('foo');
+        self::assertSame(
+            "ALTER TABLE `t1`\n DROP FOREIGN KEY IF EXISTS `foo`",
+            $alterTable->sql()
+        );
+    }
+
     public function testDropForeignKeys() : void
     {
         $alterTable = $this->alterTable->table('t1')->dropForeignKey('foo');
@@ -142,6 +169,15 @@ public function testDropForeignKeys() : void
         );
     }
 
+    public function testDropConstraintIfExists() : void
+    {
+        $alterTable = $this->alterTable->table('t1')->dropConstraintIfExists('foo');
+        self::assertSame(
+            "ALTER TABLE `t1`\n DROP CONSTRAINT IF EXISTS `foo`",
+            $alterTable->sql()
+        );
+    }
+
     public function testDropConstraints() : void
     {
         $alterTable = $this->alterTable->table('t1')->dropConstraint('foo');