[Form] How to display a message introducing that submission failed (due to errors)

[brikou]

It could be nice to explain how to display a message introducting that submission failed due to some filling errors.

To detect if form contains errors I check the used method (if POST then form is not valid)

{% if app.request.method == "POST" %} {# there must be a better way #}
<p>Your form contains errors, please check it again.</p>
{% endif %}

<form action="{{ path('myEntity_create') }}" method="post" {{ form_enctype(form) }}>
    {{ form_widget(form) }}

    <p><button type="submit">Create</button></p>
</form>

I'm sure (or I wish) there is a better way to do it but I don't want to introduce a new variable from the controller...

[wouterj]

There are 2 ways to do this on a nicer way:

{% if form.has('errors' -%}
    <p>Your form contains errors, please check it again</p>
{%- endif %}

{# or this: (here you get the exact number of errors) #}
{% if form.vars.errors|length != 0 -%}
    <p>Your form contains {{ form.vars.errors|length }} errors, please check it again</p>
{%- endif %}

[weaverryan]

@wouterj - I don't think that's quite right - because that will only return the errors that are attached at the root level form, as the children fields have errors attached to them. Without passing some data in from the controller, I'm not aware of a way to easily determine if an entire form is bound but invalid - as far as I know, all the FormView instances are completely independent of each other.

So clearly, I'm open to suggestions. If we have a nice way, it would be nice to throw in an example somewhere.

[stof]

As of symfony 2.1, the form view contains a valid variable with the return value of isValid (which detects whether there is errors in the current form or any of its children)

[weaverryan]

Thanks @stof, I didn't know that :)! I've marked this for the 2.1 milestone - I don't think it's worth covering in 2.0.

[wouterj]

I think this is covered in #2251, so I'll close this PR. If this is not the case, just leave a comment and I will reopen it.