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I am getting maximum recursion depth error from Nereid 3.2. I found main cause for this error is Babel dateformat filter in jinja template like

{{ blog_date | dateformat(format='MMM YY') }}

On debugging I found may be Nereid's speaklater for lazy rendering feature is causing the issue.

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Tarun Bhardwaj
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1 Answers1

3

Finally I got the solution and here is how I reach there.

Problem with recursion depth error with flask is its not easy to get root cause of problem, so with hit and trial approach I got tail of the problem.

Method call flow is like this:

dateformat filter > format_date() > to_user_timezone() > get_timezone()

Now get timezone method is overridden here as:

def get_timezone():
    """
    Returns the timezone that should be used for this request as
    `pytz.timezone` object.  This returns `None` if used outside of
    a request.
    """
    ctx = _request_ctx_stack.top
    tzinfo = getattr(ctx, 'babel_tzinfo', None)
    if tzinfo is None:
    babel = ctx.app.extensions['babel']
    if babel.timezone_selector_func is None:
        if not current_user.is_anonymous() and current_user.timezone:
        tzinfo = timezone(current_user.timezone)
        else:
        tzinfo = timezone(ctx.request.nereid_website.timezone)
    else:
        rv = babel.timezone_selector_func()
        if rv is None:
        tzinfo = babel.default_timezone
        else:
        if isinstance(rv, basestring):
            tzinfo = timezone(rv)
        else:
            tzinfo = rv
    ctx.babel_tzinfo = tzinfo
    return tzinfo

flask.ext.babel.get_timezone = get_timezone

From here it is calling a function field timezone in nereid_website, which by default returning company's timezone, a field which is not required.

Finally, I have fixed this issue in PR#229. Welcome reviewers!

Tarun Bhardwaj
  • 94
  • 8