battery charging（CharField cannot have a “max_length” greater than 255 when using “unique=True” Google Groups）
导读：for my needs i will patch django/db/backends/mysql/validation.py...
for my needs i will patch django/db/backends/mysql/validation.py
producing my own locally used django rpm to allow more than 255. in my
configuration this works fine. thanks all for your time and guidance!
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