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Code Issues 32 Releases Wiki Activity

[multi-db] Fix style handling: don't use mutable default style argument.

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git-svn-id: http://code.djangoproject.com/svn/django/branches/multiple-db-support@3262 bcc190cf-cafb-0310-a4f2-bffc1f526a37
This commit is contained in:
Jason Pellerin 2006-07-03 16:58:31 +00:00
parent 2f44c9f24f
commit a206863cf6
1 changed files with 16 additions and 7 deletions
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21
django/db/backends/ansi/sql.py
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@ -4,11 +4,12 @@ import os
import re
from django.db import models
# FIXME correct handling of styles,
# allow style object to be passed in
# default dummy style
class dummy:
def __getattr__(self, attr):
return lambda x: x
default_style = dummy()
del dummy
class BoundStatement(object):
"""Represents an SQL statement that is to be executed, at some point in
@ -40,7 +41,7 @@ class SchemaBuilder(object):
def __init__(self):
self.models_already_seen = []
def get_create_table(self, model, style=dummy()):
def get_create_table(self, model, style=None):
"""Construct and return the SQL expression(s) needed to create the
table for the given model, and any constraints on that
table. The return value is a 2-tuple. The first element of the tuple
@ -49,6 +50,8 @@ class SchemaBuilder(object):
can't be executed immediately because (for instance) the referent
table does not exist.
"""
if style is None:
style = default_style
if model in self.models_already_seen:
return ([], [])
self.models_already_seen.append(model)
@ -129,10 +132,12 @@ class SchemaBuilder(object):
pending.append(BoundStatement(sql, opts.connection))
return (create, pending)
def get_create_indexes(self, model, style=dummy()):
def get_create_indexes(self, model, style=None):
"""Construct and return SQL statements needed to create the indexes for
a model. Returns a list of BoundStatements.
"""
if style is None:
style = default_style
info = model._meta.connection_info
backend = info.backend
connection = info.connection
@ -155,13 +160,15 @@ class SchemaBuilder(object):
)
return output
def get_create_many_to_many(self, model, style=dummy()):
def get_create_many_to_many(self, model, style=None):
"""Construct and return SQL statements needed to create the
tables and relationships for all many-to-many relations
defined in the model. Returns a list of bound statments. Note
that these statements should only be executed after all models
for an app have been created.
"""
if style is None:
style = default_style
info = model._meta.connection_info
quote_name = info.backend.quote_name
connection = info.connection
@ -197,7 +204,9 @@ class SchemaBuilder(object):
connection))
return output
def get_initialdata(self, model, style=dummy()):
def get_initialdata(self, model, style=None):
if style is None:
style = default_style
opts = model._meta
info = opts.connection_info
settings = info.connection.settings