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Refactored get_deferrable_sql() to DatabaseOperations.deferrable_sql(). Refs #5106 

git-svn-id: http://code.djangoproject.com/svn/django/trunk@5955 bcc190cf-cafb-0310-a4f2-bffc1f526a37
This commit is contained in:
Adrian Holovaty 2007-08-19 23:03:38 +00:00
parent ed8e392f77
commit 8e84d35d38
10 changed files with 25 additions and 28 deletions
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12
django/core/management/sql.py
View File

@ -243,7 +243,7 @@ def sql_model_create(model, style, known_models=set()):
field_output.append(style.SQL_KEYWORD('REFERENCES') + ' ' + \
style.SQL_TABLE(backend.quote_name(f.rel.to._meta.db_table)) + ' (' + \
style.SQL_FIELD(backend.quote_name(f.rel.to._meta.get_field(f.rel.field_name).column)) + ')' +
backend.get_deferrable_sql()
connection.ops.deferrable_sql()
)
else:
# We haven't yet created the table to which this field
@ -280,7 +280,7 @@ def sql_for_pending_references(model, style, pending_references):
"""
Returns any ALTER TABLE statements to add constraints after the fact.
"""
from django.db import backend
from django.db import backend, connection
from django.db.backends.util import truncate_name
final_output = []
@ -299,12 +299,12 @@ def sql_for_pending_references(model, style, pending_references):
final_output.append(style.SQL_KEYWORD('ALTER TABLE') + ' %s ADD CONSTRAINT %s FOREIGN KEY (%s) REFERENCES %s (%s)%s;' % \
(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),
backend.get_deferrable_sql()))
connection.ops.deferrable_sql()))
del pending_references[model]
return final_output
def many_to_many_sql_for_model(model, style):
from django.db import backend, models
from django.db import backend, connection, models
from django.contrib.contenttypes import generic
opts = model._meta
@ -329,14 +329,14 @@ def many_to_many_sql_for_model(model, style):
style.SQL_KEYWORD('NOT NULL REFERENCES'),
style.SQL_TABLE(backend.quote_name(opts.db_table)),
style.SQL_FIELD(backend.quote_name(opts.pk.column)),
backend.get_deferrable_sql()))
connection.ops.deferrable_sql()))
table_output.append(' %s %s %s %s (%s)%s,' % \
(style.SQL_FIELD(backend.quote_name(f.m2m_reverse_name())),
style.SQL_COLTYPE(models.ForeignKey(f.rel.to).db_type()),
style.SQL_KEYWORD('NOT NULL REFERENCES'),
style.SQL_TABLE(backend.quote_name(f.rel.to._meta.db_table)),
style.SQL_FIELD(backend.quote_name(f.rel.to._meta.pk.column)),
backend.get_deferrable_sql()))
connection.ops.deferrable_sql()))
table_output.append(' %s (%s, %s)%s' % \
(style.SQL_KEYWORD('UNIQUE'),
style.SQL_FIELD(backend.quote_name(f.m2m_column_name())),

7
django/db/backends/__init__.py
View File

@ -78,3 +78,10 @@ class BaseDatabaseOperations(object):
method should return None if no casting is necessary.
"""
return None
def deferrable_sql(self):
"""
Returns the SQL necessary to make a constraint "initially deferred"
during a CREATE TABLE statement.
"""
return ''

6
django/db/backends/ado_mssql/base.py
View File

@ -60,6 +60,9 @@ class DatabaseOperations(BaseDatabaseOperations):
if lookup_type == 'day':
return "Convert(datetime, Convert(varchar(12), %s))" % field_name
def deferrable_sql(self):
return " DEFERRABLE INITIALLY DEFERRED"
class DatabaseWrapper(BaseDatabaseWrapper):
ops = DatabaseOperations()
@ -107,9 +110,6 @@ def get_limit_offset_sql(limit, offset=None):
def get_random_function_sql():
return "RAND()"
def get_deferrable_sql():
return " DEFERRABLE INITIALLY DEFERRED"
def get_fulltext_search_sql(field_name):
raise NotImplementedError

1
django/db/backends/dummy/base.py
View File

@ -46,7 +46,6 @@ dictfetchall = complain
get_last_insert_id = complain
get_limit_offset_sql = complain
get_random_function_sql = complain
get_deferrable_sql = complain
get_fulltext_search_sql = complain
get_drop_foreignkey_sql = complain
get_pk_default_value = complain

3
django/db/backends/mysql/base.py
View File

@ -161,9 +161,6 @@ def get_limit_offset_sql(limit, offset=None):
def get_random_function_sql():
return "RAND()"
def get_deferrable_sql():
return ""
def get_fulltext_search_sql(field_name):
return 'MATCH (%s) AGAINST (%%s IN BOOLEAN MODE)' % field_name

3
django/db/backends/mysql_old/base.py
View File

@ -180,9 +180,6 @@ def get_limit_offset_sql(limit, offset=None):
def get_random_function_sql():
return "RAND()"
def get_deferrable_sql():
return ""
def get_fulltext_search_sql(field_name):
return 'MATCH (%s) AGAINST (%%s IN BOOLEAN MODE)' % field_name

6
django/db/backends/oracle/base.py
View File

@ -54,6 +54,9 @@ class DatabaseOperations(BaseDatabaseOperations):
def datetime_cast_sql(self):
return "TO_TIMESTAMP(%s, 'YYYY-MM-DD HH24:MI:SS.FF')"
def deferrable_sql(self):
return " DEFERRABLE INITIALLY DEFERRED"
class DatabaseWrapper(BaseDatabaseWrapper):
ops = DatabaseOperations()
@ -183,9 +186,6 @@ def get_limit_offset_sql(limit, offset=None):
def get_random_function_sql():
return "DBMS_RANDOM.RANDOM"
def get_deferrable_sql():
return " DEFERRABLE INITIALLY DEFERRED"
def get_fulltext_search_sql(field_name):
raise NotImplementedError

6
django/db/backends/postgresql/base.py
View File

@ -66,6 +66,9 @@ class DatabaseOperations(BaseDatabaseOperations):
# http://www.postgresql.org/docs/8.0/static/functions-datetime.html#FUNCTIONS-DATETIME-TRUNC
return "DATE_TRUNC('%s', %s)" % (lookup_type, field_name)
def deferrable_sql(self):
return " DEFERRABLE INITIALLY DEFERRED"
class DatabaseWrapper(BaseDatabaseWrapper):
ops = DatabaseOperations()
@ -137,9 +140,6 @@ def get_limit_offset_sql(limit, offset=None):
def get_random_function_sql():
return "RANDOM()"
def get_deferrable_sql():
return " DEFERRABLE INITIALLY DEFERRED"
def get_fulltext_search_sql(field_name):
raise NotImplementedError

6
django/db/backends/postgresql_psycopg2/base.py
View File

@ -28,6 +28,9 @@ class DatabaseOperations(BaseDatabaseOperations):
# http://www.postgresql.org/docs/8.0/static/functions-datetime.html#FUNCTIONS-DATETIME-TRUNC
return "DATE_TRUNC('%s', %s)" % (lookup_type, field_name)
def deferrable_sql(self):
return " DEFERRABLE INITIALLY DEFERRED"
class DatabaseWrapper(BaseDatabaseWrapper):
ops = DatabaseOperations()
@ -91,9 +94,6 @@ def get_limit_offset_sql(limit, offset=None):
def get_random_function_sql():
return "RANDOM()"
def get_deferrable_sql():
return " DEFERRABLE INITIALLY DEFERRED"
def get_fulltext_search_sql(field_name):
raise NotImplementedError

3
django/db/backends/sqlite3/base.py
View File

@ -124,9 +124,6 @@ def get_limit_offset_sql(limit, offset=None):
def get_random_function_sql():
return "RANDOM()"
def get_deferrable_sql():
return ""
def get_fulltext_search_sql(field_name):
raise NotImplementedError