Zend Expressive没有将变量传递给查看脚本

Question

I am using Zend Expressive 2 due to PHP version constraints. If I return variables in step one of pipeline (IndexAction) the variables appear just fine.

If I delegate to the next step (VerifyInputAction) and determine there is an error in the input, I need to return an error to view script. For some reason, it will not take the variables with it that I pass with the template renderer. It will still load the template, just not with the $data array variables.

I'm using Zend View as the template renderer.

My pipeline looks as follows.

IndexAction()

    public function process(ServerRequestInterface $request, DelegateInterface $delegate)
    {
        if ($request->getMethod() !== "POST") {
            return new HtmlResponse($this->template->render('app::home-page', ['error' => 'hello']));
        } else {
            $delegate->process($request);
            //return new HtmlResponse($this->template->render('app::home-page'));
        }
    }

VerifyInputaction()

    public function process(ServerRequestInterface $request, DelegateInterface $delegate)
    {
        $data = [];

        $file = $request->getUploadedFiles()['recordsFile'];

        $fileType = substr($file->getClientFilename(), strpos($file->getClientFilename(), '.'));

        // If file type does not match appropriate content-type or does not have .csv extension return error
        if (! in_array($file->getClientMediaType(), $this->contentTypes) || ! in_array($fileType, $this->extensions)) {
            $data['error']['fileType'] = 'Error: Please provide a valid file type.';
            return new HtmlResponse($this->template->render('app::home-page', $data));
        }

        $delegate->process($request);
    }

Another problem that might be beyond the scope of this question includes, when I make it to the next Action in the pipeline, if I go to render a view script there I get this error...

Last middleware executed did not return a response. Method: POST Path: /<--path-->/ .Handler: Zend\Expressive\Middleware\LazyLoadingMiddleware

I will do my best to provide more code examples, but due to this being an issue at work I might have some problems with that.

Thanks!

Answer 1

Last middleware executed did not return a response. Method: POST Path: /<--path-->/ .Handler: Zend\\Expressive\\Middleware\\LazyLoadingMiddleware

An action needs to return a response. In your VerifyInputaction you don't return a response if there is no valid csv file. I'm guessing this happens in your case and the $delegate->process($request); is triggered, which probably doesn't call another action which returns a middleware.

Looking at your code, it makes more sense to call VerifyInputaction first, check if it is a post and verify. If any of those fails, go to the next action which would be IndexAction . This could display the form with an error message. You can pass error message within the request as explained here: https://docs.zendframework.com/zend-expressive/v2/cookbook/passing-data-between-middleware/

Pipeline:

• VerifyInputaction -> Check POST, verify input -> redirect if success
• IndexAction -> render template and return response

I don't see any reason in your code why $data is not passed. My guess is that somehow the template is rendered in IndexAction which doesn't have the $data but has error set. You might check for this. The confusion is here that you render the same template in 2 different actions. Using the solution I mentioned, you only need to render it in IndexAction .