Python types.UserDefinedType方法代碼示例

# 需要導入模塊: from sqlalchemy import types [as 別名]
# 或者: from sqlalchemy.types import UserDefinedType [as 別名]
def coerce_compared_value(self, op, value):
        """Suggest a type for a 'coerced' Python value in an expression.

        Default behavior for :class:`.UserDefinedType` is the
        same as that of :class:`.TypeDecorator`; by default it returns
        ``self``, assuming the compared value should be coerced into
        the same type as this one.  See
        :meth:`.TypeDecorator.coerce_compared_value` for more detail.

        .. versionchanged:: 0.8 :meth:`.UserDefinedType.coerce_compared_value`
           now returns ``self`` by default, rather than falling onto the
           more fundamental behavior of
           :meth:`.TypeEngine.coerce_compared_value`.

        """

        return self 

# 需要導入模塊: from sqlalchemy import types [as 別名]
# 或者: from sqlalchemy.types import UserDefinedType [as 別名]
def _type_affinity(self):
        """Return a rudimental 'affinity' value expressing the general class
        of type."""

        typ = None
        for t in self.__class__.__mro__:
            if t in (TypeEngine, UserDefinedType):
                return typ
            elif issubclass(t, (TypeEngine, UserDefinedType)):
                typ = t
        else:
            return self.__class__ 

# 需要導入模塊: from sqlalchemy import types [as 別名]
# 或者: from sqlalchemy.types import UserDefinedType [as 別名]
def _adapt_expression(self, op, other_comparator):
            if hasattr(self.type, 'adapt_operator'):
                util.warn_deprecated(
                    "UserDefinedType.adapt_operator is deprecated.  Create "
                    "a UserDefinedType.Comparator subclass instead which "
                    "generates the desired expression constructs, given a "
                    "particular operator."
                )
                return self.type.adapt_operator(op), self.type
            else:
                return op, self.type 

# 需要導入模塊: from sqlalchemy import types [as 別名]
# 或者: from sqlalchemy.types import UserDefinedType [as 別名]
def test_repr_custom_type_w_sqla_prefix(self):
        self.autogen_context.opts["user_module_prefix"] = None

        class MyType(UserDefinedType):
            pass

        MyType.__module__ = "sqlalchemy_util.types"

        type_ = MyType()

        eq_ignore_whitespace(
            autogenerate.render._repr_type(type_, self.autogen_context),
            "sqlalchemy_util.types.MyType()",
        ) 

# 需要導入模塊: from sqlalchemy import types [as 別名]
# 或者: from sqlalchemy.types import UserDefinedType [as 別名]
def test_repr_user_type_user_prefix_None(self):
        class MyType(UserDefinedType):
            def get_col_spec(self):
                return "MYTYPE"

        type_ = MyType()
        self.autogen_context.opts["user_module_prefix"] = None

        eq_ignore_whitespace(
            autogenerate.render._repr_type(type_, self.autogen_context),
            "tests.test_autogen_render.MyType()",
        ) 

# 需要導入模塊: from sqlalchemy import types [as 別名]
# 或者: from sqlalchemy.types import UserDefinedType [as 別名]
def test_repr_user_type_user_prefix_present(self):
        from sqlalchemy.types import UserDefinedType

        class MyType(UserDefinedType):
            def get_col_spec(self):
                return "MYTYPE"

        type_ = MyType()

        self.autogen_context.opts["user_module_prefix"] = "user."

        eq_ignore_whitespace(
            autogenerate.render._repr_type(type_, self.autogen_context),
            "user.MyType()",
        ) 

# 需要導入模塊: from sqlalchemy import types [as 別名]
# 或者: from sqlalchemy.types import UserDefinedType [as 別名]
def _adapt_expression(self, op, other_comparator):
            if hasattr(self.type, 'adapt_operator'):
                util.warn_deprecated(
                    "UserDefinedType.adapt_operator is deprecated.  Create "
                    "a UserDefinedType.Comparator subclass instead which "
                    "generates the desired expression constructs, given a "
                    "particular operator."
                )
                return self.type.adapt_operator(op), self.type
            else:
                return super(
                    UserDefinedType.Comparator, self
                )._adapt_expression(op, other_comparator) 

# 需要導入模塊: from sqlalchemy import types [as 別名]
# 或者: from sqlalchemy.types import UserDefinedType [as 別名]
def coerce_compared_value(self, op, value):
        """Suggest a type for a 'coerced' Python value in an expression.

        Default behavior for :class:`.UserDefinedType` is the
        same as that of :class:`.TypeDecorator`; by default it returns
        ``self``, assuming the compared value should be coerced into
        the same type as this one.  See
        :meth:`.TypeDecorator.coerce_compared_value` for more detail.

        """

        return self 

# 需要導入模塊: from sqlalchemy import types [as 別名]
# 或者: from sqlalchemy.types import UserDefinedType [as 別名]
def special_types_table(self, metadata):

        # create these types so that we can issue
        # special SQL92 INTERVAL syntax
        class y2m(types.UserDefinedType, postgresql.INTERVAL):
            def get_col_spec(self):
                return "INTERVAL YEAR TO MONTH"

        class d2s(types.UserDefinedType, postgresql.INTERVAL):
            def get_col_spec(self):
                return "INTERVAL DAY TO SECOND"

        table = Table(
            "sometable",
            metadata,
            Column("id", postgresql.UUID, primary_key=True),
            Column("flag", postgresql.BIT),
            Column("bitstring", postgresql.BIT(4)),
            Column("addr", postgresql.INET),
            Column("addr2", postgresql.MACADDR),
            Column("price", postgresql.MONEY),
            Column("addr3", postgresql.CIDR),
            Column("doubleprec", postgresql.DOUBLE_PRECISION),
            Column("plain_interval", postgresql.INTERVAL),
            Column("year_interval", y2m()),
            Column("month_interval", d2s()),
            Column("precision_interval", postgresql.INTERVAL(precision=3)),
            Column("tsvector_document", postgresql.TSVECTOR),
        )

        return table 

# 需要導入模塊: from sqlalchemy import types [as 別名]
# 或者: from sqlalchemy.types import UserDefinedType [as 別名]
def test_ret_type_custom(self):
        class MyType(types.UserDefinedType):
            pass

        col = column("x", HSTORE(text_type=MyType))

        is_(col["foo"].type.__class__, MyType) 

# 需要導入模塊: from sqlalchemy import types [as 別名]
# 或者: from sqlalchemy.types import UserDefinedType [as 別名]
def test_custom_astext_type(self):
        class MyType(types.UserDefinedType):
            pass

        col = column("x", JSON(astext_type=MyType))

        is_(col["q"].astext.type.__class__, MyType)

        is_(col[("q", "p")].astext.type.__class__, MyType)

        is_(col["q"]["p"].astext.type.__class__, MyType) 

# 需要導入模塊: from sqlalchemy import types [as 別名]
# 或者: from sqlalchemy.types import UserDefinedType [as 別名]
def test_user_defined_dialect_specific_args(self):
        class MyType(types.UserDefinedType):
            def __init__(self, foo="foo", **kwargs):
                super(MyType, self).__init__()
                self.foo = foo
                self.dialect_specific_args = kwargs

            def adapt(self, cls):
                return cls(foo=self.foo, **self.dialect_specific_args)

        t = MyType(bar="bar")
        a = t.dialect_impl(testing.db.dialect)
        eq_(a.foo, "foo")
        eq_(a.dialect_specific_args["bar"], "bar") 

# 需要導入模塊: from sqlalchemy import types [as 別名]
# 或者: from sqlalchemy.types import UserDefinedType [as 別名]
def setup(self):
        class UTypeOne(types.UserDefinedType):
            def get_col_spec(self):
                return "UTYPEONE"

            def bind_processor(self, dialect):
                def process(value):
                    return value + "UONE"

                return process

        class UTypeTwo(types.UserDefinedType):
            def get_col_spec(self):
                return "UTYPETWO"

            def bind_processor(self, dialect):
                def process(value):
                    return value + "UTWO"

                return process

        class UTypeThree(types.UserDefinedType):
            def get_col_spec(self):
                return "UTYPETHREE"

        self.UTypeOne = UTypeOne
        self.UTypeTwo = UTypeTwo
        self.UTypeThree = UTypeThree
        self.variant = self.UTypeOne().with_variant(
            self.UTypeTwo(), "postgresql"
        )
        self.composite = self.variant.with_variant(self.UTypeThree(), "mysql") 

# 需要導入模塊: from sqlalchemy import types [as 別名]
# 或者: from sqlalchemy.types import UserDefinedType [as 別名]
def test_bind_typing(self):
        from sqlalchemy.sql import column

        class MyFoobarType(types.UserDefinedType):
            pass

        class Foo(object):
            pass

        # unknown type + integer, right hand bind
        # coerces to given type
        expr = column("foo", MyFoobarType) + 5
        assert expr.right.type._type_affinity is MyFoobarType

        # untyped bind - it gets assigned MyFoobarType
        bp = bindparam("foo")
        expr = column("foo", MyFoobarType) + bp
        assert bp.type._type_affinity is types.NullType  # noqa
        assert expr.right.type._type_affinity is MyFoobarType

        expr = column("foo", MyFoobarType) + bindparam("foo", type_=Integer)
        assert expr.right.type._type_affinity is types.Integer

        # unknown type + unknown, right hand bind
        # coerces to the left
        expr = column("foo", MyFoobarType) + Foo()
        assert expr.right.type._type_affinity is MyFoobarType

        # including for non-commutative ops
        expr = column("foo", MyFoobarType) - Foo()
        assert expr.right.type._type_affinity is MyFoobarType

        expr = column("foo", MyFoobarType) - datetime.date(2010, 8, 25)
        assert expr.right.type._type_affinity is MyFoobarType 

# 需要導入模塊: from sqlalchemy import types [as 別名]
# 或者: from sqlalchemy.types import UserDefinedType [as 別名]
def test_user_defined(self):
        """test that dialects pass the column through on DDL."""

        class MyType(types.UserDefinedType):
            def get_col_spec(self, **kw):
                return "FOOB %s" % kw["type_expression"].name

        m = MetaData()
        t = Table("t", m, Column("bar", MyType, nullable=False))
        self.assert_compile(ddl.CreateColumn(t.c.bar), "bar FOOB bar NOT NULL")