Django不会在多个模板中呈现表单吗？

Question

New to Django. Crispy form renders beautifully on register page. Exact copy and paste doesn't render the form on login page? All help is greatly appreciated.

I've also tried removing Crispy from the equation with no luck.

main_project/urls.py

from django.contrib import admin
from django.contrib.auth import views as auth_views
from django.urls import path, include
from  users import views as user_views
from website import views as website_views

urlpatterns = [
    path('admin/', admin.site.urls),
    path('register/', user_views.register, name='register'), 
    path('home/', website_views.home, name='site-home'),
    path('login/', auth_views.LoginView.as_view(template_name='users/login.html'), name='login'),
    path('logout/', auth_views.LogoutView.as_view(template_name='users/logout.html'), name='logout')
]

users/forms.py

from django import forms
from django.contrib.auth.models import User
from django.contrib.auth.forms import UserCreationForm

class UserRegisterForm(UserCreationForm):
    first_name = forms.CharField(max_length=100)
    last_name = forms.CharField(max_length=100)
    email = forms.EmailField()
    address = forms.CharField(max_length=100)

    class Meta:
        model = User
        fields = ['username', 'email', 'password1', 'password2']

users/views.py

from django.shortcuts import render, redirect
from django.contrib import messages
from .forms import UserRegisterForm

# Create your views here.
def register(request):
    if request.method == 'POST':
        register_form = UserRegisterForm(request.POST)
        if register_form.is_valid():
            register_form.save()
            username = register_form.cleaned_data.get('username')
            email = register_form.cleaned_data.get('email')
            messages.success(request, f'Account created for {username}')
            return redirect('website-home')
    else:
        register_form = UserRegisterForm()
        return render(request, 'users/register.html', {'register_form':register_form})

users/register.html AND users/login.html

{% extends 'base.html' %}
{% load crispy_forms_tags %}

<!-- Extra Styling? -->
{% block extrahead %}
{% endblock extrahead %}

<!-- Include Navbar? -->
{% block navbar %}
{% include 'navbar.html' %}
{% endblock navbar %}

<!-- Main HTML Page Cotent -->
{% block content %}

<div class="container">
    <form>
        <fieldset>
            <div class="row justify-content-center">
                <div class="col-6">
                    {% csrf_token %}
                    <legend>
                        {{register_form|crispy}}
                    </legend>
                </div>
            </div>
        </fieldset>
        <div class='row justify-content-center'>
            <div class="col-6">
                <button type="submit" class="btn btn-success float-right">Register</button>
            </div>
        </div>
    </form>
</div>

{% endblock content %}

Answer 1

@Daniel Roseman solved this perfectly, see the comments.

Basically, the above is sort of a mess. Django class ListView() already returns a form to the template of your choosing (that's sort of the point). Using form instead of register_form for the form tag makes everything work perfect. See corrected code below.

users/login.html

{% extends 'base.html' %}
{% load crispy_forms_tags %}

<!-- Extra Styling? -->
{% block extrahead %}
{% endblock extrahead %}

<!-- Include Navbar? -->
{% block navbar %}
{% include 'navbar.html' %}
{% endblock navbar %}

<!-- Main HTML Page Cotent -->
{% block content %}

<div class="container">
        <form>
            <fieldset>
                <div class="row justify-content-center">
                    <div class="col-6">
                        {% csrf_token %}
                        <legend>
                            {{form|crispy}}
                        </legend>
                    </div>
                </div>
            </fieldset>
            <div class='row justify-content-center'>
                <div class="col-6">
                    <button type="submit" class="btn btn-success float-right">Register</button>
                </div>
            </div>
        </form>
    </div>

{% endblock content %}