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[1.8.x] Fixed #25055 -- Made m2m long name testing friendlier for 3rd party databases.

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Backport of f9c3587b51 from master
This commit is contained in:
Michael Manfre 2015-07-02 22:09:51 -04:00 committed by Tim Graham
parent cb3e9bc0d7
commit 342074f4a4
1 changed files with 15 additions and 11 deletions
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26
tests/invalid_models_tests/test_models.py
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@ -328,17 +328,21 @@ class FieldNamesTests(IsolatedModelsTestCase):
# First error because of M2M field set on the model with long name.
m2m_long_name = "verylongmodelnamezzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz_id"
expected = [
Error(
'Autogenerated column name too long for M2M field "%s". '
'Maximum length is "%s" for database "%s".'
% (m2m_long_name, self.max_column_name_length, self.column_limit_db_alias),
hint=("Use 'through' to create a separate model for "
"M2M and then set column_name using 'db_column'."),
obj=ModelWithLongField,
id='models.E019',
)
]
if self.max_column_name_length > len(m2m_long_name):
# Some databases support names longer than the test name.
expected = []
else:
expected = [
Error(
'Autogenerated column name too long for M2M field "%s". '
'Maximum length is "%s" for database "%s".'
% (m2m_long_name, self.max_column_name_length, self.column_limit_db_alias),
hint=("Use 'through' to create a separate model for "
"M2M and then set column_name using 'db_column'."),
obj=ModelWithLongField,
id='models.E019',
)
]
# Second error because the FK specified in the `through` model
# `m2msimple` has auto-genererated name longer than allowed.