Detection Form Validation

Question

I have a dynamic form.

For exemple, if something, my form contains FormType1 else my form contains FormType2 or FormType3 ....

I would detect if my form is modify.
If my form is completed, I apply is valid() method and if there is an error I return in the form or if there is no error, I apply a redirection.
I know how to do that.

But, if my fom was submitted without modifications (with no new value) I want to apply an other redirection without validation because my validation will return false with required fields.

I can't test if all values are null because in form there may be combobox or boolean, or initial value, ...

I have a solution with javascript and two submit buttons.
If the value of button submit is 'just_redirection' I don't apply the validation else I apply validation.

Is there a way in Symfony2 (or full PHP) to know if the submitted form is the same that the initial form?

1. Compare form data to database actual data, see if anything changed — RiggsFolly, Sep 02 '16 at 08:21
2. Put the original data in hidden fields and compare editable fields with hidden fields to see if anything has changed — RiggsFolly, Sep 02 '16 at 08:22
@RiggsFolly, Thks for your suggestions, those are good ideas. But for each case (form1, form2, ...) I should do apply a specifique code, that I don't want, I just want to know if there is a generic method to know if a form is modified. I I don't have a answer, may be I will code your second solution with a generic way — doydoy44, Sep 02 '16 at 08:30

score 1 · Accepted Answer · edited Sep 02 '16 at 09:52

1

Let's assume your form is bound with an entity MyEntity, in your controller you need to copy your original object, let the form handle the request, then compare your objects:

public function aRouteAction(Request $request, MyEntity $myEntity)
{
    $entityFromForm = clone $myEntity;
    // you need to clone your object, because since PHP5 a variable contains a reference to the object, so $entityFromForm = $myEntity wouldn't work

    $form = $this->createForm(new MyFormType(), $entityFromForm);
    $form->handleRequest($request);

    if($entityFromForm == $myEntity) {
        // redirect when no changes
    }

    if($form->isValid()) {
        // redirect when there are changes and form submission is valid
    }
    else {
        // return errors
    }
}

For object cloning please refer to the php manual.

edited Sep 02 '16 at 09:52

Peter Featherstone

7,835
4
32
64

answered Sep 02 '16 at 08:47

lolmx

521
6
18

Thks for your reply. I like this idea, so +1 :). I use the [CraueFormFlowBundle](https://github.com/craue/CraueFormFlowBundle) with modifications, so I will try this to validate – doydoy44 Sep 02 '16 at 08:56
You're welcome. If it doesn't apply to your use case, please add your form and controller code in your question and leave a comment ;) – lolmx Sep 02 '16 at 09:05

Detection Form Validation

1 Answers1