Django CSRF Token Rendering Issue

Based on the information provided, you're experiencing an issue where only the first {% csrf_token %} in your template is rendering as an empty string, while subsequent tokens are correctly rendering as hidden input fields.

Possible Causes

This behavior is unusual since the csrf_token template tag should consistently generate a hidden form field with the name 'csrfmiddlewaretoken' for all POST forms. According to the Django documentation, the value of this field is scrambled differently with each response using a mask to protect against BREACH attacks, but all tokens within the same response should be present.

Here are some potential causes:

1. Template Inheritance or Inclusion: If your first form is being rendered through a different template inheritance or inclusion mechanism than the others, it might affect how the CSRF token is processed.

2. JavaScript Manipulation: If there's any JavaScript that's manipulating the DOM after the page loads but before your test captures the content, it could be removing the first token.

3. Custom Middleware or Context Processor: A custom middleware or context processor might be interfering with the CSRF token generation for the first form.

4. Form Rendering Differences: The first form might have some attribute or condition that's causing Django to handle it differently.

Troubleshooting Steps

1. Examine the Raw HTML Response: Look at the raw HTML response before BeautifulSoup processing to see if the token is actually missing or if it's being removed during parsing.

PYTHONCopied
def test_home_page(self):
    c = Client(headers=HEADERS)
    resp = c.get('/')
    raw_html = resp.content.decode(resp.charset)
    print(raw_html)  # Check the raw HTML for the first form
    # Rest of your test...

2. Check Template Structure: Ensure that all forms are being rendered in the same way and that there are no conditional statements affecting the first form.

3. Test with Different CSRF Settings: Temporarily modify your test settings to see if changing CSRF settings affects the behavior:

PYTHONCopied
from django.test import override_settings

@override_settings(CSRF_USE_SESSIONS=True)  # or False if it's currently True
def test_home_page(self):
    # Your test code

4. Check for Custom Template Tags: If you have any custom template tags that might be interfering with CSRF token generation, try disabling them.

5. Inspect the First Form: Look for any unique attributes or conditions in the first form that might be causing Django to handle it differently.

Given that all tokens in the same response have the same value (zJjibteg6bAMX6zTREudDYjW5eIf9le16WohD73ipDhkuEy9C5Lzb1FRh1yuspDf), it suggests that the token generation is working correctly, but something is preventing the first token from being included in the form.

This issue doesn't appear to be directly documented in the Django 5.1 documentation, so it might be specific to your application's setup or a potential bug in Django itself.

Django CSRF Token Rendering Issue

Based on the information provided, you're experiencing an issue where only the first {% csrf_token %} in your template is rendering as an empty string, while the subsequent ones are correctly generating the hidden input field with the CSRF token.

Possible Causes

This behavior is unusual since the csrf_token template tag should consistently generate a hidden form field with the name 'csrfmiddlewaretoken' for all POST forms. According to Django's documentation, the token value is scrambled differently with each response using a mask that's generated randomly on every call to get_token().

There are a few potential explanations for this behavior:

1. Template Inheritance or Inclusion: If your first form is being rendered through a different template inheritance or inclusion mechanism than the others, it might affect how the CSRF token is processed.

2. JavaScript Manipulation: If there's any JavaScript that's manipulating the DOM after the page loads, it could be affecting the first form.

3. Custom Template Context Processor: A custom context processor might be interfering with the CSRF token generation for the first form.

4. Form Rendering Order: The way Django processes the template and renders the forms might be affecting the first CSRF token.

Troubleshooting Steps

Here are some steps you can take to diagnose and fix the issue:

1. Examine the Raw HTML: Look at the raw HTML response (before BeautifulSoup processing) to see if the token is actually missing or if it's being rendered in a way that BeautifulSoup isn't detecting.

PYTHONCopied
def test_home_page(self):
    c = Client(headers=HEADERS)
    resp = c.get('/')
    s = resp.content.decode(resp.charset)
    print(s)  # Check the raw HTML
    # Rest of your code...

2. Check Template Context: Ensure that the CSRF token is available in the template context for all forms.

3. Try Different Form Order: If possible, try changing the order of the forms in your template to see if the issue follows the first form or stays with a specific form.

4. Verify CSRF Middleware: Ensure that the CSRF middleware is properly configured in your settings.py:

PYTHONCopied
MIDDLEWARE = [
    # ...
    'django.middleware.csrf.CsrfViewMiddleware',
    # ...
]

5. Check for Custom Template Tags: If you have any custom template tags that might be interfering with the CSRF token generation, try disabling them temporarily.

Potential Solution

If you can't identify the root cause, a workaround might be to manually add the CSRF token to the first form:

HTMLCopied
<form id="frm-login-modal" action="/accounts/login/" method="post">
    <input type="hidden" name="csrfmiddlewaretoken" value="{{ csrf_token }}">
    <!-- Rest of your form -->
</form>

This approach uses the csrf_token variable directly rather than the {% csrf_token %} template tag.

If you're using Jinja2 templates instead of Django's default template engine, you should use {{ csrf_input }} instead of {% csrf_token %} as mentioned in the Django documentation.