I've been reading on the django docs about the comments framework and how to customize it (http://docs.djangoproject.com/en/1.1/ref/contrib/comments/custom/) In that page, it shows how to add new fields to a form. But what I want to do is to remove unnecesary fields, like URL, email (amongst other minor mods.)
On that same doc page it says the way to go is to extend my custom comments class from BaseCommentAbstractModel, but that's pretty much it, I've come so far and now I'm at a loss. I couldn't find anything on this specific aspect.
I recently implemented the solution that Ofri mentioned, since I only wanted to accept a solitary "comment" field for a comment (like SO does, no "name", no "email" and no "url").
To customize the default comment form and list display, I created a "comments" directory in my root "templates" directory and overrode the two default comment templates.
My "/templates/comments/form.html" is:
{% load comments i18n %}
{% if user.is_authenticated %}
<form action="{% comment_form_target %}" method="post">
{% csrf_token %}
{% if next %}<input type="hidden" name="next" value="{{ next }}" />{% endif %}
{% for field in form %}
{% if field.is_hidden %}
{{ field }}
{% else %}
{% if field.name != "name" and field.name != "email" and field.name != "url" %}
{% if field.errors %}{{ field.errors }}{% endif %}
<p {% if field.errors %} class="error"{% endif %} {% ifequal field.name "honeypot" %} style="display:none;"{% endifequal %}>
{{ field }}
</p>
{% endif %}
{% endif %}
{% endfor %}
<input type="submit" name="post" class="submit-post" value="{% trans "Add Comment" %}" />
</form>
{% else %}
I'm sorry, but you must be <a href="javascript:alert('send to login page')">logged in</a> to submit comments.
{% endif %}
Which is only slightly different from the default comments form, primarily suppressing the display of the not-required "name", "email" and "url" inputs.
My "/templates/comments/list.html" is:
<div class="comment_start"></div>
{% for comment in comment_list %}
<div class="comment">
{{ comment.comment }}
(from <a href="javascript:alert('show user profile/stats')">{{ comment.user }}</a> - {{ comment.submit_date|timesince }} ago)
</div>
{% endfor %}
On the page I want the form, I first call {% load comments %} and then {% render_comment_form for [object] %} to show the form, or {% render_comment_list for [object] %} to generate a list of the comments on the object (replace [object] with your appropriate object name).
This is working great for me, and still giving me all the other "free" stuff that comes with django comments (moderation, flagging, feeds, polymorphic associations, etc...)