octobercms/october · error · ApplicationException

File missing from request

Error message

File missing from request

What it means

Error "File missing from request" thrown in octobercms/october.

Source

Thrown at modules/backend/formwidgets/FileUpload.php:478

        $this->addJs('js/fileupload.js');
    }

    /**
     * @inheritDoc
     */
    public function getSaveValue($value)
    {
        return FormField::NO_SAVE_DATA;
    }

    /**
     * onUpload handler for the server-side processing of uploaded files
     */
    public function onUpload()
    {
        try {
            if (!Input::hasFile('file_data')) {
                throw new ApplicationException('File missing from request');
            }

            $fileModel = $this->getRelationModel();
            $uploadedFile = files('file_data');

            $validationRules = ['max:'.($this->maxFilesize * 1024)];
            if ($fileTypes = $this->getAcceptedFileTypes()) {
                $validationRules[] = 'extensions:'.$fileTypes;
            }

            if ($this->mimeTypes) {
                $validationRules[] = 'mimes:'.$this->mimeTypes;
            }

            $validation = Validator::make(
                ['file_data' => $uploadedFile],
                ['file_data' => $validationRules]
            );

View on GitHub (pinned to b608633a7e)

When it happens

Trigger: Thrown at modules/backend/formwidgets/FileUpload.php:478 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of octobercms/october@b608633a7e (2026-08-21). Data as JSON: /api/errors/8dbaf2d2ca644e49. Report an issue: GitHub.