#24008: ValidationError crashes if initialised with a list that includes a
ValidationError instance initialised with a dict.
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Reporter: seansean49 | Owner: nobody
Type: Uncategorized | Status: new
Component: Uncategorized | Version: 1.6
Severity: Normal | Keywords:
Triage Stage: Unreviewed | Has patch: 0
Easy pickings: 0 | UI/UX: 0
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According to the documentation, ValidationError can be initialised with a
list of ValidationError instances. However, if the list includes a
ValidationError that was initialised with a dictionary then it crashes
with the following error: 'ValidationError' object has no attribute
'error_list'.
This bug would occur if someone wanted to raise a ValidationError with a
set of field errors together with one or more non-field errors for
example.
For example:
>>> from django.core.exceptions import ValidationError
>>> ValidationError([ValidationError({'age', 'age cannot be negative'}),
ValidationError('Some other error')])
The problem is caused because when a ValidationError instance is
initialised with a dictionary, its error_list attribute is not set
(instead error_dict is set) but a ValidationError that is initialised with
a list tries to compile a flattened list of all errors using this
attribute from each list element. Either ValidationError should be
modified to accept a mixture of field and non-field errors (appears to me
to be the best solution) or the documentation and error message should be
changed to make usage clear.
Related to https://code.djangoproject.com/ticket/23976
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Ticket URL: <https://code.djangoproject.com/ticket/24008>
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