how to get post variable from a form?

[Thierry Durand]

Hi,

I'm trying to use wagtail for the first time, i did a form where i can select a list of url

<form method='post' action='{% pageurl self %}' class='seek'>

{% csrf_token %}

<SELECT class='input1' name='url' size='1' onChange='submit()'>

    <option value=''>Choose an url</option>

    {% for url,id in self.urls %}

        <option VALUE='{{id}}' >{{url}}</option>

    {% endfor %}

    </select>

</form>

the form display correctly, I would like now to be able to read the contain of the post variables from my model

how can I do this ??

best regards

[Matthew Westcott]

Hi Thierry,
You can do this by defining a custom 'serve' method on your Page model <http://docs.wagtail.io/en/v1.0/reference/pages/model_recipes.html#overriding-the-serve-method>. The default behaviour is simply to render the page template, but you can put in any logic that generates a Django response object, just like writing a standard view method in Django. For example, you could do:

from django.http import HttpResponse

class ExamplePage(Page):
# ... define page fields here ...

def serve(self, request):
if request.method == 'POST':
return HttpResponse('<h1>you chose URL %s</h1>' % request.POST['url'])
else:
# display the page as usual
return super(ExamplePage, self).serve(request)


Cheers,
- Matt

[Thierry Durand]

ok thanks, your script works but it's not what i want to do , i don't to display the page normally OR just display a value.

I want to display my page in any case and be able to read the post value in my page, like in php when you simply read $_POST.

so if the only way to do it is to use this, how can i pass all the post value into my page ??

regards

[Matthew Westcott]

OK, in that case you can use a 'get_context' method:

class ExamplePage(Page):
# ... define page fields here ...

def get_context(self, request):
if request.method == 'POST':
return {
'self': self,
'chosen_id': request.POST['url'],
}
else:
return {
'self': self,
'chosen_id': None,
}

The posted value is then available in the template as 'chosen_id'; or if the page is being viewed directly without a form post, chosen_id will be None.

Cheers,
- Matt

[Thierry Durand]

thank for the very quick answer,

it's exactly what I need, I cannot make your example work, {{self.chosen_id}} in my template is always empty ....

[Matthew Westcott]

You should use {{ chosen_id }}, not {{ self.chosen_id }}. The get_context method adds the new variable alongside 'self' - 'self' is only used to access properties of the page.

- Matt

[Thierry Durand]

ok, it works, it's not {{self.chose_id}} but just {{chosen_id}}

Thank you very much, I can go on now.

best regards,

Thierry

[Thierry Durand]

Hi again,

now I know how to read post form data in template, but what if I need to read them directly from the model

indeed, i need to get my id (created by the form) in the model to do a sql request to a database and the return some values to the template, got it?

I don't know how to do that ...

regards,

Thierry

[Thierry Durand]

ok, it was really a dumb ass question, it's ok, no problem to do it.

[Matthew Westcott]

No problem! If you're coming to Wagtail from the PHP world, I'd recommend following the Django tutorial: https://docs.djangoproject.com/en/1.8/intro/ . Django does a few things differently from PHP, such as encouraging you to move your application logic out of templates - it also provides tools for object lookups so that you don't have to write your own SQL queries. Everything you learn there can be applied to a Wagtail site - but if you're doing lots of custom data handling, you may find that working directly in Django is a better fit.

Cheers,
- Matt

On 18 Jul 2015, at 18:06, Thierry Durand <weblayo...@gmail.com> wrote:

> ok, it was really a dumb ass question, it's ok, no problem to do it.
>

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