Supporting latest nvd3 and d3 versions

[iyerramji]

Hi,
I see some issues with the tooltip of a linewithfocuscharts charts that are generated when I use several parameters on the y-axis.

Maybe these are automatically solved when you support latest version of nvd3 and d3 ?

Is there a plan to migrate to those ?

[areski]

It should be better to open this issue on https://github.com/areski/python-nvd3

Ideally we would support recent version of nvd3 (at this moment 1.8.1) but we could use more help, you are more than welcome to give us a hand :)

[goetzb]

@areski Do you have any update on the status? I ran into some label positioning issues in bar charts with the current NVD3 versions that are supported - my charts work much better with newer D3.js and NVD3 versions, but as other bits were broken when using django-nvd3 I kept the older versions in production.

In https://github.com/novus/nvd3/blob/master/README.md a range of new chart types are listed in the changes in the 1.8 series of releases, which might also be worth adding. I will see if I can perhaps contribute something myself to update python-nvd3 and/or django-nvd3...

[areski]

The big part of the job is to update python-nvd3 to support nvd3-v1.8, there is a branch started for it (https://github.com/areski/python-nvd3/tree/nvd3-1.8) but no much work has been done so far, we could use help. Well we need help :)

[goetzb]

Somewhat related to this existing issue: Is there any reason why python-nvd3==0.15.0 isn't supported yet? I've been pinning my dependencies to django-nvd3==0.9.7 and python-nvd3==0.15.0 for a while now without problems, but with the new pip resolver, this causes an error:

ERROR: Cannot install -r requirements_dev.txt (line 17) and python-nvd3==0.15.0 because these package versions have conflicting dependencies.
The conflict is caused by:
    The user requested python-nvd3==0.15.0
    django-nvd3 0.9.7 depends on python-nvd3==0.14.2
To fix this you could try to:
1. loosen the range of package versions you've specified
2. remove package versions to allow pip attempt to solve the dependency conflict
ERROR: ResolutionImpossible: for help visit https://pip.pypa.io/en/latest/user_guide/#fixing-conflicting-dependencies

(See Python Software Foundation Blog: New pip resolver to roll out this year from March 2020 for general information about this change.)

I would suggest a simple update to the requirements.txt that allows at least 0.15.0 as well as older versions. This change has already been made in the develop branch (https://github.com/areski/django-nvd3/blob/develop/requirements.txt, see also 639300a), it just needs to be included in a new release.

A short term fix is also mentioned in Python Software Foundation Blog: Releasing pip 20.3, featuring new dependency resolver from November 2020 which works for me, but it might stop working after January 2021 in pip 21.0:

pip install -r requirements_dev.txt --use-deprecated=legacy-resolver