django formset not validating because ID is required

Question

MY view receives a model formset from the template, but it doesn't pass validation, claiming that ID is required. Al my use of forms until now has never brought up this problem, and I've never had to pass ID's around.

Here is a simplified version of my view:

def BudgetView(request):

    import pdb
    pdb.set_trace()

    if request.user.is_authenticated:
        U=request.user

        #initalize formset factories
        ItemFormSet = modelformset_factory(Item, fields=(blabla), extra=0)
        CatFormset=modelformset_factory(BudgetCatagory, fields=(blabla), extra=0)

        #initalize Constants
        InitiateConstants(CatagoryItemsList)

        if request.method=='POST':
            FormsetItem=ItemFormSet(request.POST,initial=Item.objects.filter(budgetcatagory__user_id=U.id).values())
            FormsetCat=CatFormset(request.POST)
            if FormsetItem.is_valid():
-bla
-bla
-bla

            return redirect('/HighLevelInput')
        else:
            #populate
            I=Item.objects.filter(budgetcatagory__user_id=U.id)
            C=BudgetCatagory.objects.filter(user_id=U.id)

            #initiate initial catagories and items for new user
            if (not I.exists()) or (not C.exists()):
                Item.objects.filter(budgetcatagory__user_id=U.id).delete()
                BudgetCatagory.objects.filter(user_id=U.id).delete()
                InitiateNewUser(U)
                I=Item.objects.filter(budgetcatagory__user_id=U.id)
                C=BudgetCatagory.objects.filter(user_id=U.id)
            FormsetItem=ItemFormSet(queryset=I)
            FormsetCat=CatFormset(queryset=C)

        return render(request,'getdata/budgetmachine.html', {'FormsetItem':FormsetItem, 'FormsetCat':FormsetCat })
    else:
        return redirect('/login')

is_valid returns False for the reason I've mentioned above. any ideas?

As requested, here are the errors returned from the is_valid check:

(Pdb) FormsetItem.errors
[{'id': ['This field is required.']}, {'id': ['This field is required.']}, {'id': ['This field is required.']}, {'id': ['This field is required.']}, {'name': ['This field is required.'], 'detail': ['This field is required.'], 'layout': ['This field is required.'], 'unit': ['This field is required.'], 'unit_description': ['This field is required.'], 'parent': ['This field is required.'], 'enName': ['This field is required.'], 'id': ['This field is required.']}, {'id': ['This field is required.']}, {'id': ['This field is required.']}, {'id': ['This field is required.']}, {'id': ['This field is required.']}, {'id': ['This field is required.']}, {'id': ['This field is required.']}, {'id': ['This field is required.']}, {'id': ['This field is required.']}, {'id': ['This field is required.']}, {'id': ['This field is required.']}, {'name': ['Ensure this value has at most 30 characters (it has 32).'], 'parent': ['Ensure this value has at most 30 characters (it has 32).'], 'id': ['This field is required.']}, {'id': ['This field is required.']}, {'id': ['This field is required.']}, {'id': ['This field is required.']}, {'id': ['This field is required.']}, {'id': ['This field is required.']}, {'id': ['This field is required.']}, {'id': ['This field is required.']}, {'id': ['This field is required.']}, {'id': ['This field is required.']}, {'id': ['This field is required.']}]

And here is my template:

{% block body %}

<div class="container" style="width:80%">

  <form method="post">
    {% csrf_token %}
    {{ FormsetItem.management_form }}
    {{ FormsetCat.management_form }}

    <table>
      <tr>
        <th>פריט</th>
        <th>מחיר מתוקצב</th>
        <th>מיקום מחיר</th>
        <th>רמת פירוט</th>
        <th>רמת פירוט</th>
      </tr>

      <!--unpacks the item dictionary into formsets -->
      {% for CatForm in FormsetCat %}
        <tbody onmouseenter="ToggleDisable('{{ CatForm.enName.value}}')" onmouseleave="ToggleDisable('{{ CatForm.enName.value}}')">
          {% for ItemForm in FormsetItem %}
            {% if ItemForm.parent.value == CatForm.name.value %}
                {% if ItemForm.layout.value == 'normal' %}
                  {% include 'getdata/normalBudgetLayout.html' with form=ItemForm itemCount=forloop.counter0 catagoryCount=forloop.parentloop.counter0 %}
                {% elif ItemForm.layout.value == 'choice' %}
                  {% include 'getdata/choiceBudgetLayout.html' with form=ItemForm itemCount=forloop.counter0 catagoryCount=forloop.parentloop.counter0 %}
                {% endif %}
            {% endif %}
          {% endfor %}
        <tr class="txt_center Row_{{ CatForm.enName.value}}" style="line-height:4em; background:Silver;">
          <td>
            <a onclick="ToggleDisable('{{ CatForm.enName.value}}')">
              {{ CatForm.name.value }}
              <span style="float:left;">
                <i class="fa fa-caret-down {{ CatForm.enName.value}}" style="font-size:30px; padding:7px;"></i>
                <i class="fa fa-caret-up {{ CatForm.enName.value}}" style="font-size:30px; padding:7px;" hidden></i>
              </span>
            <!--/a-->
          </td>
          <td>{{ CatForm.catagory_cost }}</td>
          <td>TBD</td>
          <td>{{ CatForm.detail.value }}</td>
          <td></td>
        </tr>
        </tbody>
      {% endfor %}
    </table>
    <br />
    <br />
    <br />
    <button type="submit" >Submit</button>    <br />
    <br />

  </form>
</div>




{% endblock %}

Thx

Answer 1

ModelFormsets require form.id. It is rendered as a hidden field. You will need to implement it with both formsets.

{% for form in formset %}
    {% for hidden in form.hidden_fields %}
        {{ hidden }}
    {% endfor %}
    <!-- form.visible fields go here -->
{% endfor %}

Answer 2

As an addendum to @unixo 's answer, simply putting:

{{ form.id }}

without any surrounding HTML tags, will be converted to the following when the template is rendered (values for name, value and id will be generated by your formset_factory):

<input type="hidden" name="form-1-id" value="2" id="id_form-1-id">

Just make sure it's indented into the for form in formset loop.

Meaning you don't need to add class="hidden" unless you have some particular handling of hidden fields you want.