You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
96 lines
3.1 KiB
Python
96 lines
3.1 KiB
Python
10 years ago
|
|
||
|
|
from . import exclusions
|
||
|
|
from .. import schema, event
|
||
|
|
from . import config
|
||
|
|
|
||
|
|
__all__ = 'Table', 'Column',
|
||
|
|
|
||
|
|
table_options = {}
|
||
|
|
|
||
|
|
|
||
|
|
def Table(*args, **kw):
|
||
|
|
"""A schema.Table wrapper/hook for dialect-specific tweaks."""
|
||
|
|
|
||
|
|
test_opts = dict([(k, kw.pop(k)) for k in kw.keys()
|
||
|
|
if k.startswith('test_')])
|
||
|
|
|
||
|
|
kw.update(table_options)
|
||
|
|
|
||
|
|
if exclusions.against('mysql'):
|
||
|
|
if 'mysql_engine' not in kw and 'mysql_type' not in kw:
|
||
|
|
if 'test_needs_fk' in test_opts or 'test_needs_acid' in test_opts:
|
||
|
|
kw['mysql_engine'] = 'InnoDB'
|
||
|
|
else:
|
||
|
|
kw['mysql_engine'] = 'MyISAM'
|
||
|
|
|
||
|
|
# Apply some default cascading rules for self-referential foreign keys.
|
||
|
|
# MySQL InnoDB has some issues around seleting self-refs too.
|
||
|
|
if exclusions.against('firebird'):
|
||
|
|
table_name = args[0]
|
||
|
|
unpack = (config.db.dialect.
|
||
|
|
identifier_preparer.unformat_identifiers)
|
||
|
|
|
||
|
|
# Only going after ForeignKeys in Columns. May need to
|
||
|
|
# expand to ForeignKeyConstraint too.
|
||
|
|
fks = [fk
|
||
|
|
for col in args if isinstance(col, schema.Column)
|
||
|
|
for fk in col.foreign_keys]
|
||
|
|
|
||
|
|
for fk in fks:
|
||
|
|
# root around in raw spec
|
||
|
|
ref = fk._colspec
|
||
|
|
if isinstance(ref, schema.Column):
|
||
|
|
name = ref.table.name
|
||
|
|
else:
|
||
|
|
# take just the table name: on FB there cannot be
|
||
|
|
# a schema, so the first element is always the
|
||
|
|
# table name, possibly followed by the field name
|
||
|
|
name = unpack(ref)[0]
|
||
|
|
if name == table_name:
|
||
|
|
if fk.ondelete is None:
|
||
|
|
fk.ondelete = 'CASCADE'
|
||
|
|
if fk.onupdate is None:
|
||
|
|
fk.onupdate = 'CASCADE'
|
||
|
|
|
||
|
|
return schema.Table(*args, **kw)
|
||
|
|
|
||
|
|
|
||
|
|
def Column(*args, **kw):
|
||
|
|
"""A schema.Column wrapper/hook for dialect-specific tweaks."""
|
||
|
|
|
||
|
|
test_opts = dict([(k, kw.pop(k)) for k in kw.keys()
|
||
|
|
if k.startswith('test_')])
|
||
|
|
|
||
|
|
if not config.requirements.foreign_key_ddl.enabled:
|
||
|
|
args = [arg for arg in args if not isinstance(arg, schema.ForeignKey)]
|
||
|
|
|
||
|
|
col = schema.Column(*args, **kw)
|
||
|
|
if 'test_needs_autoincrement' in test_opts and \
|
||
|
|
kw.get('primary_key', False):
|
||
|
|
|
||
|
|
# allow any test suite to pick up on this
|
||
|
|
col.info['test_needs_autoincrement'] = True
|
||
|
|
|
||
|
|
# hardcoded rule for firebird, oracle; this should
|
||
|
|
# be moved out
|
||
|
|
if exclusions.against('firebird', 'oracle'):
|
||
|
|
def add_seq(c, tbl):
|
||
|
|
c._init_items(
|
||
|
|
schema.Sequence(_truncate_name(
|
||
|
|
config.db.dialect, tbl.name + '_' + c.name + '_seq'),
|
||
|
|
optional=True)
|
||
|
|
)
|
||
|
|
event.listen(col, 'after_parent_attach', add_seq, propagate=True)
|
||
|
|
return col
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
def _truncate_name(dialect, name):
|
||
|
|
if len(name) > dialect.max_identifier_length:
|
||
|
|
return name[0:max(dialect.max_identifier_length - 6, 0)] + \
|
||
|
|
"_" + hex(hash(name) % 64)[2:]
|
||
|
|
else:
|
||
|
|
return name
|