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Removed ProseColumn and TextColumn. Huzzah.

This commit is contained in:
Eevee 2011-03-23 22:17:02 -07:00
parent 68e14e663e
commit 8ad84e4032
4 changed files with 298 additions and 298 deletions
pokedex/db

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@ -1,11 +1,11 @@
from functools import partial
from sqlalchemy.ext.associationproxy import association_proxy
from sqlalchemy.orm import compile_mappers, mapper, relationship, synonym
from sqlalchemy.orm import aliased, compile_mappers, mapper, relationship, synonym
from sqlalchemy.orm.collections import attribute_mapped_collection
from sqlalchemy.orm.session import Session, object_session
from sqlalchemy.schema import Column, ForeignKey, Table
from sqlalchemy.sql.expression import and_, bindparam
from sqlalchemy.sql.expression import and_, bindparam, select
from sqlalchemy.types import Integer
def create_translation_table(_table_name, foreign_class, relation_name,
@ -48,6 +48,7 @@ TODO remove this requirement
are rows in the created tables.
- `(relation_name)_local`, a relation to the row in the new table that
matches the current default language.
- `(relation_name)_class`, the class created by this function.
Note that these are distinct relations. Even though the former necessarily
includes the latter, SQLAlchemy doesn't treat them as linked; loading one
@ -77,7 +78,7 @@ TODO remove this requirement
Translations = type(_table_name, (object,), {
'_language_identifier': association_proxy('language', 'identifier'),
})
# Create the table object
table = Table(_table_name, foreign_class.__table__.metadata,
Column(foreign_key_name, Integer, ForeignKey(foreign_class.id),
@ -109,6 +110,8 @@ TODO remove this requirement
})
# Add full-table relations to the original class
# Foo.bars_table
setattr(foreign_class, relation_name + '_table', Translations)
# Foo.bars
setattr(foreign_class, relation_name, relationship(Translations,
primaryjoin=foreign_class.id == Translations.object_id,
@ -119,13 +122,19 @@ TODO remove this requirement
# Foo.bars_local
# This is a bit clever; it uses bindparam() to make the join clause
# modifiable on the fly. db sessions know the current language identifier
# populates the bindparam.
# populates the bindparam. The manual alias and join are (a) to make the
# condition nice (sqla prefers an EXISTS) and to make the columns play nice
# when foreign_class == language_class.
local_relation_name = relation_name + '_local'
language_class_a = aliased(language_class)
setattr(foreign_class, local_relation_name, relationship(Translations,
primaryjoin=and_(
foreign_class.id == Translations.object_id,
Translations._language_identifier ==
bindparam('_default_language', required=True),
Translations.language_id == select(
[language_class_a.id],
language_class_a.identifier ==
bindparam('_default_language', required=True),
),
),
uselist=False,
# TODO MORESO HERE
@ -153,11 +162,7 @@ TODO remove this requirement
return Translations
class MultilangSession(Session):
"""A tiny Session subclass that adds support for a default language.
Change the default_language attribute to whatever language's IDENTIFIER you
would like to be the default.
"""
"""A tiny Session subclass that adds support for a default language."""
default_language = 'en'
def execute(self, clause, params=None, *args, **kwargs):