def as_declarative(**kw):
"""
Class decorator for :func:`.declarative_base`.
Provides a syntactical shortcut to the ``cls`` argument
sent to :func:`.declarative_base`, allowing the base class
to be converted in-place to a "declarative" base::
from sqlalchemy.ext.declarative import as_declarative
@as_declarative()
class Base(object):
@declared_attr
def __tablename__(cls):
return cls.__name__.lower()
id = Column(Integer, primary_key=True)
class MyMappedClass(Base):
# ...
All keyword arguments passed to :func:`.as_declarative` are passed
along to :func:`.declarative_base`.
.. versionadded:: 0.8.3
.. seealso::
:func:`.declarative_base`
"""
def decorate(cls):
kw['cls'] = cls
kw['name'] = cls.__name__
return declarative_base(**kw)
return decorate
python类as_declarative()的实例源码
def as_declarative(**kw):
"""
Class decorator for :func:`.declarative_base`.
Provides a syntactical shortcut to the ``cls`` argument
sent to :func:`.declarative_base`, allowing the base class
to be converted in-place to a "declarative" base::
from sqlalchemy.ext.declarative import as_declarative
@as_declarative()
class Base(object):
@declared_attr
def __tablename__(cls):
return cls.__name__.lower()
id = Column(Integer, primary_key=True)
class MyMappedClass(Base):
# ...
All keyword arguments passed to :func:`.as_declarative` are passed
along to :func:`.declarative_base`.
.. versionadded:: 0.8.3
.. seealso::
:func:`.declarative_base`
"""
def decorate(cls):
kw['cls'] = cls
kw['name'] = cls.__name__
return declarative_base(**kw)
return decorate
def as_declarative(**kw):
"""
Class decorator for :func:`.declarative_base`.
Provides a syntactical shortcut to the ``cls`` argument
sent to :func:`.declarative_base`, allowing the base class
to be converted in-place to a "declarative" base::
from sqlalchemy.ext.declarative import as_declarative
@as_declarative()
class Base(object):
@declared_attr
def __tablename__(cls):
return cls.__name__.lower()
id = Column(Integer, primary_key=True)
class MyMappedClass(Base):
# ...
All keyword arguments passed to :func:`.as_declarative` are passed
along to :func:`.declarative_base`.
.. versionadded:: 0.8.3
.. seealso::
:func:`.declarative_base`
"""
def decorate(cls):
kw['cls'] = cls
kw['name'] = cls.__name__
return declarative_base(**kw)
return decorate
def as_declarative(**kw):
"""
Class decorator for :func:`.declarative_base`.
Provides a syntactical shortcut to the ``cls`` argument
sent to :func:`.declarative_base`, allowing the base class
to be converted in-place to a "declarative" base::
from sqlalchemy.ext.declarative import as_declarative
@as_declarative()
class Base(object):
@declared_attr
def __tablename__(cls):
return cls.__name__.lower()
id = Column(Integer, primary_key=True)
class MyMappedClass(Base):
# ...
All keyword arguments passed to :func:`.as_declarative` are passed
along to :func:`.declarative_base`.
.. versionadded:: 0.8.3
.. seealso::
:func:`.declarative_base`
"""
def decorate(cls):
kw['cls'] = cls
kw['name'] = cls.__name__
return declarative_base(**kw)
return decorate
def as_declarative(**kw):
"""
Class decorator for :func:`.declarative_base`.
Provides a syntactical shortcut to the ``cls`` argument
sent to :func:`.declarative_base`, allowing the base class
to be converted in-place to a "declarative" base::
from sqlalchemy.ext.declarative import as_declarative
@as_declarative()
class Base(object):
@declared_attr
def __tablename__(cls):
return cls.__name__.lower()
id = Column(Integer, primary_key=True)
class MyMappedClass(Base):
# ...
All keyword arguments passed to :func:`.as_declarative` are passed
along to :func:`.declarative_base`.
.. versionadded:: 0.8.3
.. seealso::
:func:`.declarative_base`
"""
def decorate(cls):
kw['cls'] = cls
kw['name'] = cls.__name__
return declarative_base(**kw)
return decorate
def as_declarative(**kw):
"""
Class decorator for :func:`.declarative_base`.
Provides a syntactical shortcut to the ``cls`` argument
sent to :func:`.declarative_base`, allowing the base class
to be converted in-place to a "declarative" base::
from sqlalchemy.ext.declarative import as_declarative
@as_declarative()
class Base(object):
@declared_attr
def __tablename__(cls):
return cls.__name__.lower()
id = Column(Integer, primary_key=True)
class MyMappedClass(Base):
# ...
All keyword arguments passed to :func:`.as_declarative` are passed
along to :func:`.declarative_base`.
.. versionadded:: 0.8.3
.. seealso::
:func:`.declarative_base`
"""
def decorate(cls):
kw['cls'] = cls
kw['name'] = cls.__name__
return declarative_base(**kw)
return decorate
def as_declarative(**kw):
"""
Class decorator for :func:`.declarative_base`.
Provides a syntactical shortcut to the ``cls`` argument
sent to :func:`.declarative_base`, allowing the base class
to be converted in-place to a "declarative" base::
from sqlalchemy.ext.declarative import as_declarative
@as_declarative()
class Base(object):
@declared_attr
def __tablename__(cls):
return cls.__name__.lower()
id = Column(Integer, primary_key=True)
class MyMappedClass(Base):
# ...
All keyword arguments passed to :func:`.as_declarative` are passed
along to :func:`.declarative_base`.
.. versionadded:: 0.8.3
.. seealso::
:func:`.declarative_base`
"""
def decorate(cls):
kw['cls'] = cls
kw['name'] = cls.__name__
return declarative_base(**kw)
return decorate
def as_declarative(**kw):
"""
Class decorator for :func:`.declarative_base`.
Provides a syntactical shortcut to the ``cls`` argument
sent to :func:`.declarative_base`, allowing the base class
to be converted in-place to a "declarative" base::
from sqlalchemy.ext.declarative import as_declarative
@as_declarative()
class Base(object):
@declared_attr
def __tablename__(cls):
return cls.__name__.lower()
id = Column(Integer, primary_key=True)
class MyMappedClass(Base):
# ...
All keyword arguments passed to :func:`.as_declarative` are passed
along to :func:`.declarative_base`.
.. versionadded:: 0.8.3
.. seealso::
:func:`.declarative_base`
"""
def decorate(cls):
kw['cls'] = cls
kw['name'] = cls.__name__
return declarative_base(**kw)
return decorate
def as_declarative(**kw):
"""
Class decorator for :func:`.declarative_base`.
Provides a syntactical shortcut to the ``cls`` argument
sent to :func:`.declarative_base`, allowing the base class
to be converted in-place to a "declarative" base::
from sqlalchemy.ext.declarative import as_declarative
@as_declarative()
class Base(object):
@declared_attr
def __tablename__(cls):
return cls.__name__.lower()
id = Column(Integer, primary_key=True)
class MyMappedClass(Base):
# ...
All keyword arguments passed to :func:`.as_declarative` are passed
along to :func:`.declarative_base`.
.. versionadded:: 0.8.3
.. seealso::
:func:`.declarative_base`
"""
def decorate(cls):
kw['cls'] = cls
kw['name'] = cls.__name__
return declarative_base(**kw)
return decorate
def as_declarative(**kw):
"""
Class decorator for :func:`.declarative_base`.
Provides a syntactical shortcut to the ``cls`` argument
sent to :func:`.declarative_base`, allowing the base class
to be converted in-place to a "declarative" base::
from sqlalchemy.ext.declarative import as_declarative
@as_declarative()
class Base(object):
@declared_attr
def __tablename__(cls):
return cls.__name__.lower()
id = Column(Integer, primary_key=True)
class MyMappedClass(Base):
# ...
All keyword arguments passed to :func:`.as_declarative` are passed
along to :func:`.declarative_base`.
.. versionadded:: 0.8.3
.. seealso::
:func:`.declarative_base`
"""
def decorate(cls):
kw['cls'] = cls
kw['name'] = cls.__name__
return declarative_base(**kw)
return decorate
def as_declarative(**kw):
"""
Class decorator for :func:`.declarative_base`.
Provides a syntactical shortcut to the ``cls`` argument
sent to :func:`.declarative_base`, allowing the base class
to be converted in-place to a "declarative" base::
from sqlalchemy.ext.declarative import as_declarative
@as_declarative()
class Base(object):
@declared_attr
def __tablename__(cls):
return cls.__name__.lower()
id = Column(Integer, primary_key=True)
class MyMappedClass(Base):
# ...
All keyword arguments passed to :func:`.as_declarative` are passed
along to :func:`.declarative_base`.
.. versionadded:: 0.8.3
.. seealso::
:func:`.declarative_base`
"""
def decorate(cls):
kw['cls'] = cls
kw['name'] = cls.__name__
return declarative_base(**kw)
return decorate
def as_declarative(**kw):
"""
Class decorator for :func:`.declarative_base`.
Provides a syntactical shortcut to the ``cls`` argument
sent to :func:`.declarative_base`, allowing the base class
to be converted in-place to a "declarative" base::
from sqlalchemy.ext.declarative import as_declarative
@as_declarative()
class Base(object):
@declared_attr
def __tablename__(cls):
return cls.__name__.lower()
id = Column(Integer, primary_key=True)
class MyMappedClass(Base):
# ...
All keyword arguments passed to :func:`.as_declarative` are passed
along to :func:`.declarative_base`.
.. versionadded:: 0.8.3
.. seealso::
:func:`.declarative_base`
"""
def decorate(cls):
kw['cls'] = cls
kw['name'] = cls.__name__
return declarative_base(**kw)
return decorate
def as_declarative(**kw):
"""
Class decorator for :func:`.declarative_base`.
Provides a syntactical shortcut to the ``cls`` argument
sent to :func:`.declarative_base`, allowing the base class
to be converted in-place to a "declarative" base::
from sqlalchemy.ext.declarative import as_declarative
@as_declarative()
class Base(object):
@declared_attr
def __tablename__(cls):
return cls.__name__.lower()
id = Column(Integer, primary_key=True)
class MyMappedClass(Base):
# ...
All keyword arguments passed to :func:`.as_declarative` are passed
along to :func:`.declarative_base`.
.. versionadded:: 0.8.3
.. seealso::
:func:`.declarative_base`
"""
def decorate(cls):
kw['cls'] = cls
kw['name'] = cls.__name__
return declarative_base(**kw)
return decorate
def as_declarative(**kw):
"""
Class decorator for :func:`.declarative_base`.
Provides a syntactical shortcut to the ``cls`` argument
sent to :func:`.declarative_base`, allowing the base class
to be converted in-place to a "declarative" base::
from sqlalchemy.ext.declarative import as_declarative
@as_declarative()
class Base(object):
@declared_attr
def __tablename__(cls):
return cls.__name__.lower()
id = Column(Integer, primary_key=True)
class MyMappedClass(Base):
# ...
All keyword arguments passed to :func:`.as_declarative` are passed
along to :func:`.declarative_base`.
.. versionadded:: 0.8.3
.. seealso::
:func:`.declarative_base`
"""
def decorate(cls):
kw['cls'] = cls
kw['name'] = cls.__name__
return declarative_base(**kw)
return decorate
def as_declarative(**kw):
"""
Class decorator for :func:`.declarative_base`.
Provides a syntactical shortcut to the ``cls`` argument
sent to :func:`.declarative_base`, allowing the base class
to be converted in-place to a "declarative" base::
from sqlalchemy.ext.declarative import as_declarative
@as_declarative()
class Base(object):
@declared_attr
def __tablename__(cls):
return cls.__name__.lower()
id = Column(Integer, primary_key=True)
class MyMappedClass(Base):
# ...
All keyword arguments passed to :func:`.as_declarative` are passed
along to :func:`.declarative_base`.
.. versionadded:: 0.8.3
.. seealso::
:func:`.declarative_base`
"""
def decorate(cls):
kw['cls'] = cls
kw['name'] = cls.__name__
return declarative_base(**kw)
return decorate
def as_declarative(**kw):
"""
Class decorator for :func:`.declarative_base`.
Provides a syntactical shortcut to the ``cls`` argument
sent to :func:`.declarative_base`, allowing the base class
to be converted in-place to a "declarative" base::
from sqlalchemy.ext.declarative import as_declarative
@as_declarative()
class Base(object):
@declared_attr
def __tablename__(cls):
return cls.__name__.lower()
id = Column(Integer, primary_key=True)
class MyMappedClass(Base):
# ...
All keyword arguments passed to :func:`.as_declarative` are passed
along to :func:`.declarative_base`.
.. versionadded:: 0.8.3
.. seealso::
:func:`.declarative_base`
"""
def decorate(cls):
kw['cls'] = cls
kw['name'] = cls.__name__
return declarative_base(**kw)
return decorate
def as_declarative(**kw):
"""
Class decorator for :func:`.declarative_base`.
Provides a syntactical shortcut to the ``cls`` argument
sent to :func:`.declarative_base`, allowing the base class
to be converted in-place to a "declarative" base::
from sqlalchemy.ext.declarative import as_declarative
@as_declarative()
class Base(object):
@declared_attr
def __tablename__(cls):
return cls.__name__.lower()
id = Column(Integer, primary_key=True)
class MyMappedClass(Base):
# ...
All keyword arguments passed to :func:`.as_declarative` are passed
along to :func:`.declarative_base`.
.. versionadded:: 0.8.3
.. seealso::
:func:`.declarative_base`
"""
def decorate(cls):
kw['cls'] = cls
kw['name'] = cls.__name__
return declarative_base(**kw)
return decorate
def as_declarative(**kw):
"""
Class decorator for :func:`.declarative_base`.
Provides a syntactical shortcut to the ``cls`` argument
sent to :func:`.declarative_base`, allowing the base class
to be converted in-place to a "declarative" base::
from sqlalchemy.ext.declarative import as_declarative
@as_declarative()
class Base(object):
@declared_attr
def __tablename__(cls):
return cls.__name__.lower()
id = Column(Integer, primary_key=True)
class MyMappedClass(Base):
# ...
All keyword arguments passed to :func:`.as_declarative` are passed
along to :func:`.declarative_base`.
.. versionadded:: 0.8.3
.. seealso::
:func:`.declarative_base`
"""
def decorate(cls):
kw['cls'] = cls
kw['name'] = cls.__name__
return declarative_base(**kw)
return decorate
def as_declarative(**kw):
"""
Class decorator for :func:`.declarative_base`.
Provides a syntactical shortcut to the ``cls`` argument
sent to :func:`.declarative_base`, allowing the base class
to be converted in-place to a "declarative" base::
from sqlalchemy.ext.declarative import as_declarative
@as_declarative()
class Base(object):
@declared_attr
def __tablename__(cls):
return cls.__name__.lower()
id = Column(Integer, primary_key=True)
class MyMappedClass(Base):
# ...
All keyword arguments passed to :func:`.as_declarative` are passed
along to :func:`.declarative_base`.
.. versionadded:: 0.8.3
.. seealso::
:func:`.declarative_base`
"""
def decorate(cls):
kw['cls'] = cls
kw['name'] = cls.__name__
return declarative_base(**kw)
return decorate
def as_declarative(**kw):
"""
Class decorator for :func:`.declarative_base`.
Provides a syntactical shortcut to the ``cls`` argument
sent to :func:`.declarative_base`, allowing the base class
to be converted in-place to a "declarative" base::
from sqlalchemy.ext.declarative import as_declarative
@as_declarative()
class Base(object):
@declared_attr
def __tablename__(cls):
return cls.__name__.lower()
id = Column(Integer, primary_key=True)
class MyMappedClass(Base):
# ...
All keyword arguments passed to :func:`.as_declarative` are passed
along to :func:`.declarative_base`.
.. versionadded:: 0.8.3
.. seealso::
:func:`.declarative_base`
"""
def decorate(cls):
kw['cls'] = cls
kw['name'] = cls.__name__
return declarative_base(**kw)
return decorate
def as_declarative(**kw):
"""
Class decorator for :func:`.declarative_base`.
Provides a syntactical shortcut to the ``cls`` argument
sent to :func:`.declarative_base`, allowing the base class
to be converted in-place to a "declarative" base::
from sqlalchemy.ext.declarative import as_declarative
@as_declarative()
class Base(object):
@declared_attr
def __tablename__(cls):
return cls.__name__.lower()
id = Column(Integer, primary_key=True)
class MyMappedClass(Base):
# ...
All keyword arguments passed to :func:`.as_declarative` are passed
along to :func:`.declarative_base`.
.. versionadded:: 0.8.3
.. seealso::
:func:`.declarative_base`
"""
def decorate(cls):
kw['cls'] = cls
kw['name'] = cls.__name__
return declarative_base(**kw)
return decorate
def as_declarative(**kw):
"""
Class decorator for :func:`.declarative_base`.
Provides a syntactical shortcut to the ``cls`` argument
sent to :func:`.declarative_base`, allowing the base class
to be converted in-place to a "declarative" base::
from sqlalchemy.ext.declarative import as_declarative
@as_declarative()
class Base(object):
@declared_attr
def __tablename__(cls):
return cls.__name__.lower()
id = Column(Integer, primary_key=True)
class MyMappedClass(Base):
# ...
All keyword arguments passed to :func:`.as_declarative` are passed
along to :func:`.declarative_base`.
.. versionadded:: 0.8.3
.. seealso::
:func:`.declarative_base`
"""
def decorate(cls):
kw['cls'] = cls
kw['name'] = cls.__name__
return declarative_base(**kw)
return decorate
def as_declarative(**kw):
"""
Class decorator for :func:`.declarative_base`.
Provides a syntactical shortcut to the ``cls`` argument
sent to :func:`.declarative_base`, allowing the base class
to be converted in-place to a "declarative" base::
from sqlalchemy.ext.declarative import as_declarative
@as_declarative()
class Base(object):
@declared_attr
def __tablename__(cls):
return cls.__name__.lower()
id = Column(Integer, primary_key=True)
class MyMappedClass(Base):
# ...
All keyword arguments passed to :func:`.as_declarative` are passed
along to :func:`.declarative_base`.
.. versionadded:: 0.8.3
.. seealso::
:func:`.declarative_base`
"""
def decorate(cls):
kw['cls'] = cls
kw['name'] = cls.__name__
return declarative_base(**kw)
return decorate
def as_declarative(**kw):
"""
Class decorator for :func:`.declarative_base`.
Provides a syntactical shortcut to the ``cls`` argument
sent to :func:`.declarative_base`, allowing the base class
to be converted in-place to a "declarative" base::
from sqlalchemy.ext.declarative import as_declarative
@as_declarative()
class Base(object):
@declared_attr
def __tablename__(cls):
return cls.__name__.lower()
id = Column(Integer, primary_key=True)
class MyMappedClass(Base):
# ...
All keyword arguments passed to :func:`.as_declarative` are passed
along to :func:`.declarative_base`.
.. versionadded:: 0.8.3
.. seealso::
:func:`.declarative_base`
"""
def decorate(cls):
kw['cls'] = cls
kw['name'] = cls.__name__
return declarative_base(**kw)
return decorate
def as_declarative(**kw):
"""
Class decorator for :func:`.declarative_base`.
Provides a syntactical shortcut to the ``cls`` argument
sent to :func:`.declarative_base`, allowing the base class
to be converted in-place to a "declarative" base::
from sqlalchemy.ext.declarative import as_declarative
@as_declarative()
class Base(object):
@declared_attr
def __tablename__(cls):
return cls.__name__.lower()
id = Column(Integer, primary_key=True)
class MyMappedClass(Base):
# ...
All keyword arguments passed to :func:`.as_declarative` are passed
along to :func:`.declarative_base`.
.. versionadded:: 0.8.3
.. seealso::
:func:`.declarative_base`
"""
def decorate(cls):
kw['cls'] = cls
kw['name'] = cls.__name__
return declarative_base(**kw)
return decorate
def as_declarative(**kw):
"""
Class decorator for :func:`.declarative_base`.
Provides a syntactical shortcut to the ``cls`` argument
sent to :func:`.declarative_base`, allowing the base class
to be converted in-place to a "declarative" base::
from sqlalchemy.ext.declarative import as_declarative
@as_declarative()
class Base(object):
@declared_attr
def __tablename__(cls):
return cls.__name__.lower()
id = Column(Integer, primary_key=True)
class MyMappedClass(Base):
# ...
All keyword arguments passed to :func:`.as_declarative` are passed
along to :func:`.declarative_base`.
.. versionadded:: 0.8.3
.. seealso::
:func:`.declarative_base`
"""
def decorate(cls):
kw['cls'] = cls
kw['name'] = cls.__name__
return declarative_base(**kw)
return decorate
def repr_entity(entity: object) -> str:
"""Make a representation string for the given ``entity`` object.
If the class specified ``__repr_columns__`` it prints
these attributes instead of its primary keys.
.. code-block::
from sqlalchemy.ext.declarative import as_declarative
from ormeasy.sqlalchemy import repr_entity
@as_declarative()
class Base:
def __repr__(self):
return repr_entity(self)
class Song(Base):
__tablename__ = 'song'
__repr_columns__ = 'name', 'genre'
id = Column(Integer, primary_key=True)
name = Column(Unicode)
genre = Column(Unicode)
print(repr(Song(name='hello', genre='brit-pop'))) # it prints `<Song name=hello, genre=brit-pop>`
.. seealso::
``as_declarative``
http://docs.sqlalchemy.org/en/latest/orm/extensions/declarative/api.html#sqlalchemy.ext.declarative.as_declarative
:param entity: an object to make a representation string
:return: a representation string
:rtype: :class:`str`
""" # noqa
cls = type(entity)
mod = cls.__module__
name = ('' if mod == '__main__ ' else mod + '.') + cls.__qualname__
try:
columns = entity.__repr_columns__
except AttributeError:
columns = cls.__mapper__.primary_key
names = (column if isinstance(column, str) else column.name
for column in columns)
pairs = ((name, getattr(entity, name))
for name in names
if hasattr(entity, name))
args = ' '.join(k + '=' + repr(v) for k, v in pairs)
return '<{0} {1}>'.format(name, args)
