Unable To Update The Model

Hi Expert friends,

Im using the relational database with relations in my model.

when i'm trying to update my_Model(by uploading new image i.e, by deleting old image) i'm getting the following error. how can i overcome this problem.


CDbCommand failed to execute the SQL statement: SQLSTATE[23000]: Integrity constraint violation: 1451 Cannot delete or update a parent row: a foreign key constraint fails (`imember`.`organisation`, CONSTRAINT `organisation_logo` FOREIGN KEY (`logo_file_id`) REFERENCES `file` (`id`) ON DELETE NO ACTION ON UPDATE NO ACTION). The SQL statement executed was: DELETE FROM `file` WHERE `file`.`id`='21'



my controller updateAction is like this:

public function actionUpdate($id)
	{
		//retrieving
		$fileModel = new File;
		$model=MyModel::model()->findByPk($id);
		$file = File::model()->findByPk($model->file_id);
			
		

		if (isset($_POST['MyModel'])) {
			$model->attributes = $_POST['MyModel'];
			if($fileModel->file = CUploadedFile::getInstance($model, 'file')){
		
				//deleting the old file,dir and record in file table if new file is uploading
				unlink(getcwd().'/uploads/'.$model->file_id.'/'.$file->file_name.$file->extension);
				rmdir(getcwd().'/uploads/'.$model->file_id);
				File::model()->findByPk($model->file_id)->delete();
				$fileModel->attributes = $_POST['MyModel'];
				
				
				   
				if ($model->validate()) {
				
				
				if ($fileModel->saveImage()) {
						
					// update the organisation
					$model->file_id = $fileModel->id;
					if ($model->save())

how can i overcome this problem..

Any help pls

Thanks in advance