Incorrect String Value Error when Saving Unicode Strings in Django
When attempting to save unicode strings to Django's auth_user model, you may encounter a "incorrect string value" error. This error is typically caused by the MySQL character set and collation settings.
MySQL Character Set and Collation
MySQL supports the UTF-8 character set, but it has a 3-byte limit on characters. This means that it is not possible to store 4-byte unicode characters in MySQL with the standard UTF-8 character set.
Problem Explanation
When Django attempts to save unicode strings to the auth_user model, MySQL tries to convert them to the UTF-8 character set. However, if the strings contain 4-byte characters, the conversion fails and results in the "incorrect string value" error.
Solution
To resolve this issue, you can:
DATABASES = { 'default': { 'ENGINE': 'django.db.backends.mysql', ... 'OPTIONS': {'charset': 'utf8mb4'}, } }
Additional Considerations
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