Help with django form an ajax, error 500

[Elros Romeo]

Hi, i hope you can help me, im trying to make a django post form without reloading the page using ajax, but im getting error 500 when submit, can you help me to fix this, this is my code:

models.py

class ProductoConcepto(models.Model):

producto = models.ForeignKey(Producto)

orden = models.ForeignKey(Cobro)

cantidad = models.FloatField()

urls.py

from django.conf.urls import patterns, include, url

from django.contrib import admin

from cobro import views

urlpatterns = [

    url(r'^cobro/agregar_concepto/$', views.addconcept_product, name='add_concepto'),

]

views.py

def addconcept_product(request):

    if request.method == 'POST':

        if form.is_valid():

            producto = request.POST['producto']

            orden = request.POST['orden']

            cantidad = request.POST['cantidad']

            ProductoConcepto.objects.create(producto=producto, orden=orden, cantidad=cantidad)

            return HttpResponse('')

template

        <div class="modal inmodal fade" id="myModal1" tabindex="-1" role="dialog"  aria-hidden="true">

            <div class="modal-dialog modal-m">

                <div class="modal-content">

                    <div class="modal-header">

                        <button type="button" class="close" data-dismiss="modal">

                            <span aria-hidden="true">&times;</span>

                            <span class="sr-only">Cerrar</span>

                        </button>

                        <h3 class="modal-title">Agregar nuevo concepto</h3>

                    </div>

                    <div class="modal-body">

                        <p>Datos de concepto a agregar:</p>

                        <div class="doctorformstyle">

                        <form id='formulario-modal' method='post' enctype='multipart/form-data'>

                            {% csrf_token %}

                            <ul>{{form2.as_p}}</ul>

<!--  rendered form2 fields: <select id="id_producto" name="producto"><option value="1" selected="selected">object</option></select> -->

<!--  form2 fields: <select id="id_orden" name="orden">

<option value="1" selected="selected">object</option>

</select> -->

<!--  form2 fields: <input id="id_cantidad" name="cantidad" step="any" type="number"> -->

                            <div class="row align-center">

                                <input type='submit' name="save1" value='Guardar' class="btn btn-w-m btn-primary"/>

                            </div>

                        </form>

</div>

                    </div>

                </div>

            </div>

        </div>

<script type="text/javascript">

    $(document).on('submit', '#formulario-modal', function(e){

            e.preventDefault();

            $.ajax ({

                type: 'POST',

                url: '{% url 'add_concepto' %}',

                data: {

                    producto: $('#id_producto').val(),

                    orden: $('#id_orden').val(),

                    cantidad: $('#id_cantidad').val(),

                    csrfmiddlewaretoken: '{{ csrf_token }}',

                },

                sucess:function(){

                    alert("OK");

                }

            })

    });

</script>

this is the error:  POST http://127.0.0.1:8000/cobro/agregar_concepto/ 500 (Internal Server Error)

[ludovic coues]

The error should come with a backtrace. Providing the backtrace will
help a lot in finding the error.

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[Andrew Beales]

Guessing this is old news, but there are 2 problems with views:

ProductoConcepto.objects.create(producto=producto, orden=orden, cantidad=cantidad)

- producto and orden need to be Python objects and cantidad is a float, but the request.POST values will be string representations.

Also the ajax post doesn't involve the forms API, so no 'if form.is_valid()'

You'd need to do something like this:

        if request.method == 'POST':

            producto = Producto.objects.get(name=request.POST['producto'])
            orden = etc.
            cantidad = float(etc)

            ProductoConcepto.objects.create(producto=producto, orden=orden, cantidad=cantidad)

[agapito treviño]

Elros Romeo

as defined by the form.as_p.?

I want to implement this

[Constantine Covtushenko]

Sorry guys, please skip my previous post. It appeared unfinished.

My correct one below.

Hi Andrew,

To have a proper `to_python` transformation from `POST` strings please use forms.

They do that perfectly and also they can handle any king of user input validations.

form = SomeCustomForm(request.POST)
if form.is_valid():

parsed_dictionary = form.cleaned_data()

//some other required stuff

As for 'Ajax'. It seems like you should manually parse body before any further processing. Request instance has `is_ajax` method to detect such requests.

That can be done

import json
if request.is_ajax():

query_dict =  json.loads(request.body)

I hope it helps.

Regards,

Constantine C.

[Fred Stluka]

Elros Romeo,

Can you see the log file?  It may show details of the 500 error,
which will likely be some error reported by your Django code.
Could be anything from a Python syntax error to a failed attempt
to connect to a DB, to a misconfigured settings file, or anything
else.

--Fred

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Bristle Software, Inc -- http://bristle.com -- Glad to be of service!
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