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fix #152

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This commit is contained in:
Petr Dlouhý 2020-03-13 19:55:27 +01:00
parent 28d1185793
commit a3a3f8106e
1 changed files with 9 additions and 0 deletions
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9
categories/migration.py
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@ -22,6 +22,15 @@ def field_exists(app_name, model_name, field_name):
cursor = connection.cursor()
field_info = connection.introspection.get_table_description(cursor, table_name)
field_names = [f.name for f in field_info]
# Return True if the many to many table exists
field = model._meta.get_field(field_name)
if hasattr(field, 'm2m_db_table'):
m2m_table_name = field.m2m_db_table()
m2m_field_info = connection.introspection.get_table_description(cursor, m2m_table_name)
if m2m_field_info:
return True
return field_name in field_names