[9.x] Added dropForeignIdFor method to match foreignIdFor method (#40950)

* Added dropForeignIdFor method to match foreignIdFor method so adding and dropping can be performed similarly

* Updated to match constrained and non constrained

* Updated formatting so CI passes

* Updated formatting so CI passes

* formatting

Co-authored-by: Taylor Otwell <taylor@laravel.com>

Author: bretto36

src/Illuminate/Database/Schema/Blueprint.php

@@ -413,6 +413,38 @@ public function dropConstrainedForeignId($column)
         return $this->dropColumn($column);
     }
 
+    /**
+     * Indicate that the given foreign key should be dropped.
+     *
+     * @param  \Illuminate\Database\Eloquent\Model|string  $model
+     * @param  string|null  $column
+     * @return \Illuminate\Support\Fluent
+     */
+    public function dropForeignIdFor($model, $column = null)
+    {
+        if (is_string($model)) {
+            $model = new $model;
+        }
+
+        return $this->dropForeign([$column ?: $model->getForeignKey()]);
+    }
+
+    /**
+     * Indicate that the given foreign key should be dropped.
+     *
+     * @param  \Illuminate\Database\Eloquent\Model|string  $model
+     * @param  string|null  $column
+     * @return \Illuminate\Support\Fluent
+     */
+    public function dropConstrainedForeignIdFor($model, $column = null)
+    {
+        if (is_string($model)) {
+            $model = new $model;
+        }
+
+        return $this->dropConstrainedForeignId($column ?: $model->getForeignKey());
+    }
+
     /**
      * Indicate that the given indexes should be renamed.
      *

tests/Database/DatabaseSchemaBlueprintTest.php

@@ -292,6 +292,72 @@ public function testGenerateRelationshipColumnWithUuidModel()
         ], $blueprint->toSql($connection, new MySqlGrammar));
     }
 
+    public function testDropRelationshipColumnWithIncrementalModel()
+    {
+        $base = new Blueprint('posts', function ($table) {
+            $table->dropForeignIdFor('Illuminate\Foundation\Auth\User');
+        });
+
+        $connection = m::mock(Connection::class);
+
+        $blueprint = clone $base;
+
+        $this->assertEquals([
+            'alter table `posts` drop foreign key `posts_user_id_foreign`',
+        ], $blueprint->toSql($connection, new MySqlGrammar));
+    }
+
+    public function testDropRelationshipColumnWithUuidModel()
+    {
+        require_once __DIR__.'/stubs/EloquentModelUuidStub.php';
+
+        $base = new Blueprint('posts', function ($table) {
+            $table->dropForeignIdFor('EloquentModelUuidStub');
+        });
+
+        $connection = m::mock(Connection::class);
+
+        $blueprint = clone $base;
+
+        $this->assertEquals([
+            'alter table `posts` drop foreign key `posts_eloquent_model_uuid_stub_id_foreign`',
+        ], $blueprint->toSql($connection, new MySqlGrammar));
+    }
+
+    public function testDropConstrainedRelationshipColumnWithIncrementalModel()
+    {
+        $base = new Blueprint('posts', function ($table) {
+            $table->dropConstrainedForeignIdFor('Illuminate\Foundation\Auth\User');
+        });
+
+        $connection = m::mock(Connection::class);
+
+        $blueprint = clone $base;
+
+        $this->assertEquals([
+            'alter table `posts` drop foreign key `posts_user_id_foreign`',
+            'alter table `posts` drop `user_id`',
+        ], $blueprint->toSql($connection, new MySqlGrammar));
+    }
+
+    public function testDropConstrainedRelationshipColumnWithUuidModel()
+    {
+        require_once __DIR__.'/stubs/EloquentModelUuidStub.php';
+
+        $base = new Blueprint('posts', function ($table) {
+            $table->dropConstrainedForeignIdFor('EloquentModelUuidStub');
+        });
+
+        $connection = m::mock(Connection::class);
+
+        $blueprint = clone $base;
+
+        $this->assertEquals([
+            'alter table `posts` drop foreign key `posts_eloquent_model_uuid_stub_id_foreign`',
+            'alter table `posts` drop `eloquent_model_uuid_stub_id`',
+        ], $blueprint->toSql($connection, new MySqlGrammar));
+    }
+
     public function testTinyTextColumn()
     {
         $base = new Blueprint('posts', function ($table) {