Fix: registering a new user with a full name longer than 255 characters

[DmytroAlipov]

Description

Fixing an error when a new user tries registering on the platform with a name longer than 255 characters.

edx.quince-rg.lms  | The above exception was the direct cause of the following exception:
edx.quince-rg.lms  | 
edx.quince-rg.lms  | Traceback (most recent call last):
edx.quince-rg.lms  |   File "/edx/app/edxapp/venvs/edxapp/lib/python3.8/site-packages/django/core/handlers/exception.py", line 55, in inner
edx.quince-rg.lms  |     response = get_response(request)
edx.quince-rg.lms  |   File "/edx/app/edxapp/venvs/edxapp/lib/python3.8/site-packages/django/core/handlers/base.py", line 197, in _get_response
edx.quince-rg.lms  |     response = wrapped_callback(request, *callback_args, **callback_kwargs)
edx.quince-rg.lms  |   File "/edx/app/edxapp/venvs/edxapp/lib/python3.8/site-packages/django/views/decorators/csrf.py", line 56, in wrapper_view
edx.quince-rg.lms  |     return view_func(*args, **kwargs)
edx.quince-rg.lms  |   File "/edx/app/edxapp/venvs/edxapp/lib/python3.8/site-packages/django/views/generic/base.py", line 104, in view
edx.quince-rg.lms  |     return self.dispatch(request, *args, **kwargs)
edx.quince-rg.lms  |   File "/edx/app/edxapp/venvs/edxapp/lib/python3.8/site-packages/django/utils/decorators.py", line 46, in _wrapper
edx.quince-rg.lms  |     return bound_method(*args, **kwargs)
edx.quince-rg.lms  |   File "/edx/app/edxapp/venvs/edxapp/lib/python3.8/site-packages/django/utils/decorators.py", line 46, in _wrapper
edx.quince-rg.lms  |     return bound_method(*args, **kwargs)
edx.quince-rg.lms  |   File "/edx/app/edxapp/venvs/edxapp/lib/python3.8/site-packages/django/views/decorators/debug.py", line 92, in sensitive_post_parameters_wrapper
edx.quince-rg.lms  |     return view(request, *args, **kwargs)
edx.quince-rg.lms  |   File "/edx/app/edxapp/edx-platform/openedx/core/djangoapps/user_authn/views/register.py", line 531, in dispatch
edx.quince-rg.lms  |     return super().dispatch(request, *args, **kwargs)
edx.quince-rg.lms  |   File "/edx/app/edxapp/venvs/edxapp/lib/python3.8/site-packages/rest_framework/views.py", line 509, in dispatch
edx.quince-rg.lms  |     response = self.handle_exception(exc)
edx.quince-rg.lms  |   File "/edx/app/edxapp/venvs/edxapp/lib/python3.8/site-packages/rest_framework/views.py", line 469, in handle_exception
edx.quince-rg.lms  |     self.raise_uncaught_exception(exc)
edx.quince-rg.lms  |   File "/edx/app/edxapp/venvs/edxapp/lib/python3.8/site-packages/rest_framework/views.py", line 480, in raise_uncaught_exception
edx.quince-rg.lms  |     raise exc
edx.quince-rg.lms  |   File "/edx/app/edxapp/venvs/edxapp/lib/python3.8/site-packages/rest_framework/views.py", line 506, in dispatch
edx.quince-rg.lms  |     response = handler(request, *args, **kwargs)
edx.quince-rg.lms  |   File "/edx/app/edxapp/venvs/edxapp/lib/python3.8/site-packages/django/utils/decorators.py", line 46, in _wrapper
edx.quince-rg.lms  |     return bound_method(*args, **kwargs)
edx.quince-rg.lms  |   File "/edx/app/edxapp/venvs/edxapp/lib/python3.8/site-packages/django/views/decorators/csrf.py", line 56, in wrapper_view
edx.quince-rg.lms  |     return view_func(*args, **kwargs)
edx.quince-rg.lms  |   File "/edx/app/edxapp/venvs/edxapp/lib/python3.8/site-packages/django/utils/decorators.py", line 46, in _wrapper
edx.quince-rg.lms  |     return bound_method(*args, **kwargs)
edx.quince-rg.lms  |   File "/edx/app/edxapp/venvs/edxapp/lib/python3.8/site-packages/django_ratelimit/decorators.py", line 27, in _wrapped
edx.quince-rg.lms  |     return fn(request, *args, **kw)
edx.quince-rg.lms  |   File "/edx/app/edxapp/edx-platform/openedx/core/djangoapps/user_authn/views/register.py", line 587, in post
edx.quince-rg.lms  |     response, user = self._create_account(request, data)
edx.quince-rg.lms  |   File "/edx/app/edxapp/edx-platform/openedx/core/djangoapps/user_authn/views/register.py", line 666, in _create_account
edx.quince-rg.lms  |     user = create_account_with_params(request, data)
edx.quince-rg.lms  |   File "/edx/app/edxapp/edx-platform/openedx/core/djangoapps/user_authn/views/register.py", line 211, in create_account_with_params
edx.quince-rg.lms  |     (user, profile, registration) = do_create_account(form, custom_form)
edx.quince-rg.lms  |   File "/edx/app/edxapp/edx-platform/common/djangoapps/student/helpers.py", line 753, in do_create_account
edx.quince-rg.lms  |     profile.save()
edx.quince-rg.lms  |   File "/edx/app/edxapp/venvs/edxapp/lib/python3.8/site-packages/django/db/models/base.py", line 814, in save
edx.quince-rg.lms  |     self.save_base(
edx.quince-rg.lms  |   File "/edx/app/edxapp/venvs/edxapp/lib/python3.8/site-packages/django/db/models/base.py", line 877, in save_base
edx.quince-rg.lms  |     updated = self._save_table(
edx.quince-rg.lms  |   File "/edx/app/edxapp/venvs/edxapp/lib/python3.8/site-packages/django/db/models/base.py", line 1020, in _save_table
edx.quince-rg.lms  |     results = self._do_insert(
edx.quince-rg.lms  |   File "/edx/app/edxapp/venvs/edxapp/lib/python3.8/site-packages/django/db/models/base.py", line 1061, in _do_insert
edx.quince-rg.lms  |     return manager._insert(
edx.quince-rg.lms  |   File "/edx/app/edxapp/venvs/edxapp/lib/python3.8/site-packages/django/db/models/manager.py", line 87, in manager_method
edx.quince-rg.lms  |     return getattr(self.get_queryset(), name)(*args, **kwargs)
edx.quince-rg.lms  |   File "/edx/app/edxapp/venvs/edxapp/lib/python3.8/site-packages/django/db/models/query.py", line 1805, in _insert
edx.quince-rg.lms  |     return query.get_compiler(using=using).execute_sql(returning_fields)
edx.quince-rg.lms  |   File "/edx/app/edxapp/venvs/edxapp/lib/python3.8/site-packages/django/db/models/sql/compiler.py", line 1822, in execute_sql
edx.quince-rg.lms  |     cursor.execute(sql, params)
edx.quince-rg.lms  |   File "/edx/app/edxapp/venvs/edxapp/lib/python3.8/site-packages/debug_toolbar/panels/sql/tracking.py", line 252, in execute
edx.quince-rg.lms  |     return self._record(super().execute, sql, params)
edx.quince-rg.lms  |   File "/edx/app/edxapp/venvs/edxapp/lib/python3.8/site-packages/debug_toolbar/panels/sql/tracking.py", line 177, in _record
edx.quince-rg.lms  |     return method(sql, params)
edx.quince-rg.lms  |   File "/edx/app/edxapp/venvs/edxapp/lib/python3.8/site-packages/django/db/backends/utils.py", line 102, in execute
edx.quince-rg.lms  |     return super().execute(sql, params)
edx.quince-rg.lms  |   File "/edx/app/edxapp/venvs/edxapp/lib/python3.8/site-packages/django/db/backends/utils.py", line 67, in execute
edx.quince-rg.lms  |     return self._execute_with_wrappers(
edx.quince-rg.lms  |   File "/edx/app/edxapp/venvs/edxapp/lib/python3.8/site-packages/django/db/backends/utils.py", line 80, in _execute_with_wrappers
edx.quince-rg.lms  |     return executor(sql, params, many, context)
edx.quince-rg.lms  |   File "/edx/app/edxapp/venvs/edxapp/lib/python3.8/site-packages/django/db/backends/utils.py", line 89, in _execute
edx.quince-rg.lms  |     return self.cursor.execute(sql, params)
edx.quince-rg.lms  |   File "/edx/app/edxapp/venvs/edxapp/lib/python3.8/site-packages/django/db/utils.py", line 91, in __exit__
edx.quince-rg.lms  |     raise dj_exc_value.with_traceback(traceback) from exc_value
edx.quince-rg.lms  |   File "/edx/app/edxapp/venvs/edxapp/lib/python3.8/site-packages/django/db/backends/utils.py", line 89, in _execute
edx.quince-rg.lms  |     return self.cursor.execute(sql, params)
edx.quince-rg.lms  |   File "/edx/app/edxapp/venvs/edxapp/lib/python3.8/site-packages/django/db/backends/mysql/base.py", line 75, in execute
edx.quince-rg.lms  |     return self.cursor.execute(query, args)
edx.quince-rg.lms  |   File "/edx/app/edxapp/venvs/edxapp/lib/python3.8/site-packages/MySQLdb/cursors.py", line 179, in execute
edx.quince-rg.lms  |     res = self._query(mogrified_query)
edx.quince-rg.lms  |   File "/edx/app/edxapp/venvs/edxapp/lib/python3.8/site-packages/MySQLdb/cursors.py", line 330, in _query
edx.quince-rg.lms  |     db.query(q)
edx.quince-rg.lms  |   File "/edx/app/edxapp/venvs/edxapp/lib/python3.8/site-packages/MySQLdb/connections.py", line 255, in query
edx.quince-rg.lms  |     _mysql.connection.query(self, query)
edx.quince-rg.lms  | django.db.utils.DataError: (1406, "Data too long for column 'name' at row 1")
edx.quince-rg.lms  | [23/Apr/2024 11:26:00] "POST /api/user/v2/account/registration/ HTTP/1.1" 500 561223

Error 500 is returned to the user

I will also make a fix in Authn MFE so that a request with such a long name will not be sent. But this fix will protect the backend from errors in writing to the database.

In this case, a 400 response will be sent to the user:

---

PS: MR#1242 to Authn MFE

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