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Do cheaper check for column having a type.

This commit is contained in:
Andrew Godwin 2012-09-24 12:19:32 +01:00
parent f0e09e27f6
commit 1a6d07783d
1 changed files with 3 additions and 3 deletions
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6
django/db/backends/schema.py
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@ -347,11 +347,11 @@ class BaseDatabaseSchemaEditor(object):
# Special-case implicit M2M tables # Special-case implicit M2M tables
if isinstance(field, ManyToManyField) and field.rel.through._meta.auto_created: if isinstance(field, ManyToManyField) and field.rel.through._meta.auto_created:
return self.delete_model(field.rel.through) return self.delete_model(field.rel.through)
# It might not actually have a column behind it
if field.db_parameters(connection=self.connection)['type'] is None:
return
# Get the column's definition # Get the column's definition
definition, params = self.column_sql(model, field) definition, params = self.column_sql(model, field)
# It might not actually have a column behind it
if definition is None:
return
# Delete the column # Delete the column
sql = self.sql_delete_column % { sql = self.sql_delete_column % {
"table": self.quote_name(model._meta.db_table), "table": self.quote_name(model._meta.db_table),