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Fixed #2257 -- MySQL wants constraint names to be unique per-database…

…, so fixed

the SQL generation to ensure this.


git-svn-id: http://code.djangoproject.com/svn/django/trunk@3373 bcc190cf-cafb-0310-a4f2-bffc1f526a37
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commit 0016547e9b29db789c416fab74f39561db4e75ef 1 parent ab4ffe5
@malcolmt malcolmt authored
Showing with 8 additions and 2 deletions.
  1. +8 −2 django/core/management.py
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10 django/core/management.py
@@ -197,6 +197,7 @@ def _get_sql_for_pending_references(klass, pending_references):
data_types = get_creation_module().DATA_TYPES
final_output = []
+ reference_names = {}
if backend.supports_constraints:
opts = klass._meta
if klass in pending_references:
@@ -206,9 +207,14 @@ def _get_sql_for_pending_references(klass, pending_references):
r_col = f.column
table = opts.db_table
col = opts.get_field(f.rel.field_name).column
+ r_name = '%s_referencing_%s_%s' % (r_col, table, col)
+ if r_name in reference_names:
+ reference_names[r_name] += 1
+ r_name += '_%s' % reference_names[r_name]
+ else:
+ reference_names[r_name] = 0
final_output.append(style.SQL_KEYWORD('ALTER TABLE') + ' %s ADD CONSTRAINT %s FOREIGN KEY (%s) REFERENCES %s (%s);' % \
- (backend.quote_name(r_table),
- backend.quote_name('%s_referencing_%s_%s' % (r_col, table, col)),
+ (backend.quote_name(r_table), r_name,
backend.quote_name(r_col), backend.quote_name(table), backend.quote_name(col)))
del pending_references[klass]
return final_output
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