Re: User errors and fat model, skinny controller

Validation and validation errors. You always have form on such pages,
so you can use $form->error(). Existence of field in DB is not
necessary for validation. You can just call $this-
>invalidate('file_format') in model, write there appropriate error
message, and output it on page.

On May 18, 6:27 am, calvin <cal...@rottenrecords.com> wrote:
> So since I've started trying to implement the fat model, skinny
> controller MVC pattern, I've continuously run into one issue--the
> problem of dealing with user errors.
>
> Fat model, skinny controller is great as it predisposes developers
> towards a top-down development style that produces self-documenting
> and more maintainable code. But I've found that, the more I try to
> move the business logic to the model, the harder it is for me to
> display detailed error messages or otherwise alter the view in
> response to different use cases.
>
> For example, if one is trying to write an action that allows the user
> to upload a sales report, you could write something like:
> function upload() {
>     if (!empty($this->data) {
>          if ($this->Report->upload($this->data) {
>              $this->Session->flash('Sales report uploaded and
> processed.');
>              $this->redirect(...);
>          } else {
>              $this->Session->flash('Sales report could not be
> processed.');
>          }
>     }
>
> }
>
> And in Report::upload() you might save the uploaded file and process
> the sales data it contains.
>
> But what if the file was successfully uploaded, but could not be
> processed for some reason? E.g. how do you tell the user that the file
> uploaded correctly, but its contents are incorrect? Or how do you tell
> the user that the file uploaded correctly, but one of the products
> referenced by the sales report is not in the database and must be
> added first?
>
> Has anyone else encountered this problem? How have others overcome it?
> Do you throw lots of exceptions or just return an array that includes
> error/status info?
>
> Check out the new CakePHP Questions sitehttp://cakeqs.organd help others with their CakePHP related questions.
>
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