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Code Issues 32 Releases Wiki Activity

[boulder-oracle-sprint] Added truncate_name to ADD CONSTRAINT code

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git-svn-id: http://code.djangoproject.com/svn/django/branches/boulder-oracle-sprint@3976 bcc190cf-cafb-0310-a4f2-bffc1f526a37
This commit is contained in:
Boulder Sprinters
2006-11-04 20:43:43 +00:00
parent a642b4ada2
commit b543ef9bf1
1 changed files with 22 additions and 27 deletions
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9
django/core/management.py
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@@ -214,6 +214,7 @@ def _get_sql_for_pending_references(model, pending_references):
Get any ALTER TABLE statements to add constraints after the fact.
"""
from django.db import backend, get_creation_module
from django.db.backend.util import truncate_name
data_types = get_creation_module().DATA_TYPES
final_output = []
@@ -229,14 +230,8 @@ def _get_sql_for_pending_references(model, pending_references):
# For MySQL, r_name must be unique in the first 64 characters.
# So we are careful with character usage here.
r_name = '%s_refs_%s_%x' % (r_col, col, abs(hash((r_table, table))))
# if constraint name size is over 29 char and db is oracle, chop it
if settings.DATABASE_ENGINE == 'oracle' and len(r_name) > 29:
final_output.append(style.SQL_KEYWORD('ALTER TABLE') + ' %s ADD CONSTRAINT %s FOREIGN KEY (%s) REFERENCES %s (%s);' % \
(backend.quote_name(r_table), r_name[0:29],
backend.quote_name(r_col), backend.quote_name(table), backend.quote_name(col)))
else:
final_output.append(style.SQL_KEYWORD('ALTER TABLE') + ' %s ADD CONSTRAINT %s FOREIGN KEY (%s) REFERENCES %s (%s);' % \
(backend.quote_name(r_table), r_name,
(backend.quote_name(r_table), truncate_name(r_name, backend.get_max_name_length()),
backend.quote_name(r_col), backend.quote_name(table), backend.quote_name(col)))
del pending_references[model]
return final_output