Custom registration form error messages

[i-oden]

Added custom messages. Currently not showing up, for them to actually be visible we need to add novalidate to the html form.

• Tests passing
• Black formatting
• [ - ] Migrations for any changes to the database schema
• Rebase/merge the dev branch
• Note in the CHANGELOG

[codecov]

Codecov Report

Merging #975 (b08e53b) into dev (1773e20) will decrease coverage by 0.02%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##              dev     #975      +/-   ##
==========================================
- Coverage   87.84%   87.81%   -0.03%     
==========================================
  Files          26       26              
  Lines        2903     2898       -5     
==========================================
- Hits         2550     2545       -5     
  Misses        353      353              

Impacted Files	Coverage Δ
dds_web/forms.py	97.29% <100.00%> (-0.08%)	⬇️
dds_web/web/user.py	83.33% <100.00%> (-0.27%)	⬇️

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[ewels]

Nice! Much of this validation we can also do in the front-end if we want, both with native browser controls and maybe some simple javascript. Can be nice to get immediate validation errors before submitting the form.

Any chance the things like username / password lengths etc could be put in some kind of config variable to make them easier to reuse?

[i-oden]

@ewels Should be possible to create a custom field so I'll have a look now!

[ewels]

Sorry, not in the output (these work as html attributes so can just be printed into the HTML template), I more just mean in the Python so that we don't have to keep 3 lots of validation parameters in sync..

[i-oden]

@ewels Yeah started looking into that too but I think I'll create a card for this for now. But definitely a good point, should add some config for username, password etc.

[i-oden]

@ewels #978

[aanil]

👍

[aanil]

👍 Looks ok!