Python types.NULLTYPE属性代码示例

# 需要导入模块: from sqlalchemy import types [as 别名]
# 或者: from sqlalchemy.types import NULLTYPE [as 别名]
def test_detect_coercion_of_builtins(self):
        @inspection._self_inspects
        class SomeSQLAThing(object):
            def __repr__(self):
                return "some_sqla_thing()"

        class SomeOtherThing(object):
            pass

        assert_raises_message(
            exc.ArgumentError,
            r"SQL expression element or literal value expected, got "
            r"some_sqla_thing\(\).",
            lambda: column("a", String) == SomeSQLAThing(),
        )

        is_(bindparam("x", SomeOtherThing()).type, types.NULLTYPE) 

# 需要导入模块: from sqlalchemy import types [as 别名]
# 或者: from sqlalchemy.types import NULLTYPE [as 别名]
def to_constraint(self, migration_context=None):
        if not util.sqla_100:
            raise NotImplementedError(
                "ExcludeConstraint not supported until SQLAlchemy 1.0")
        if self._orig_constraint is not None:
            return self._orig_constraint
        schema_obj = schemaobj.SchemaObjects(migration_context)
        t = schema_obj.table(self.table_name, schema=self.schema)
        excl = ExcludeConstraint(
            *self.elements,
            name=self.constraint_name,
            where=self.where,
            **self.kw
        )
        for expr, name, oper in excl._render_exprs:
            t.append_column(Column(name, NULLTYPE))
        t.append_constraint(excl)
        return excl 

# 需要导入模块: from sqlalchemy import types [as 别名]
# 或者: from sqlalchemy.types import NULLTYPE [as 别名]
def _get_column_info(self, name, type_, nullable, autoincrement, default,
                         precision, scale, length):

        coltype = self.ischema_names.get(type_, None)

        kwargs = {}

        if coltype in (NUMERIC, DECIMAL):
            args = (precision, scale)
        elif coltype == FLOAT:
            args = (precision,)
        elif coltype in (CHAR, VARCHAR, UNICHAR, UNIVARCHAR, NCHAR, NVARCHAR):
            args = (length,)
        else:
            args = ()

        if coltype:
            coltype = coltype(*args, **kwargs)
            # is this necessary
            # if is_array:
            #     coltype = ARRAY(coltype)
        else:
            util.warn("Did not recognize type '%s' of column '%s'" %
                      (type_, name))
            coltype = sqltypes.NULLTYPE

        if default:
            default = re.sub("DEFAULT", "", default).strip()
            default = re.sub("^'(.*)'$", lambda m: m.group(1), default)
        else:
            default = None

        column_info = dict(name=name, type=coltype, nullable=nullable,
                           default=default, autoincrement=autoincrement)
        return column_info 

# 需要导入模块: from sqlalchemy import types [as 别名]
# 或者: from sqlalchemy.types import NULLTYPE [as 别名]
def _setup_referent(self, metadata, constraint):
        spec = constraint.elements[0]._get_colspec()
        parts = spec.split(".")
        tname = parts[-2]
        if len(parts) == 3:
            referent_schema = parts[0]
        else:
            referent_schema = None

        if tname != '_alembic_batch_temp':
            key = sql_schema._get_table_key(tname, referent_schema)
            if key in metadata.tables:
                t = metadata.tables[key]
                for elem in constraint.elements:
                    colname = elem._get_colspec().split(".")[-1]
                    if not t.c.contains_column(colname):
                        t.append_column(
                            Column(colname, sqltypes.NULLTYPE)
                        )
            else:
                Table(
                    tname, metadata,
                    *[Column(n, sqltypes.NULLTYPE) for n in
                        [elem._get_colspec().split(".")[-1]
                         for elem in constraint.elements]],
                    schema=referent_schema) 

# 需要导入模块: from sqlalchemy import types [as 别名]
# 或者: from sqlalchemy.types import NULLTYPE [as 别名]
def to_column(self, migration_context=None):
        if self._orig_column is not None:
            return self._orig_column
        schema_obj = schemaobj.SchemaObjects(migration_context)
        return schema_obj.column(self.column_name, NULLTYPE) 

# 需要导入模块: from sqlalchemy import types [as 别名]
# 或者: from sqlalchemy.types import NULLTYPE [as 别名]
def primary_key_constraint(self, name, table_name, cols, schema=None):
        m = self.metadata()
        columns = [sa_schema.Column(n, NULLTYPE) for n in cols]
        t = sa_schema.Table(
            table_name, m,
            *columns,
            schema=schema)
        p = sa_schema.PrimaryKeyConstraint(
            *[t.c[n] for n in cols], name=name)
        t.append_constraint(p)
        return p 

# 需要导入模块: from sqlalchemy import types [as 别名]
# 或者: from sqlalchemy.types import NULLTYPE [as 别名]
def _ensure_table_for_fk(self, metadata, fk):
        """create a placeholder Table object for the referent of a
        ForeignKey.

        """
        if isinstance(fk._colspec, string_types):
            table_key, cname = fk._colspec.rsplit('.', 1)
            sname, tname = self._parse_table_key(table_key)
            if table_key not in metadata.tables:
                rel_t = sa_schema.Table(tname, metadata, schema=sname)
            else:
                rel_t = metadata.tables[table_key]
            if cname not in rel_t.c:
                rel_t.append_column(sa_schema.Column(cname, NULLTYPE)) 

# 需要导入模块: from sqlalchemy import types [as 别名]
# 或者: from sqlalchemy.types import NULLTYPE [as 别名]
def _textual_index_column(table, text_):
    """a workaround for the Index construct's severe lack of flexibility"""
    if isinstance(text_, compat.string_types):
        c = Column(text_, sqltypes.NULLTYPE)
        table.append_column(c)
        return c
    elif isinstance(text_, TextClause):
        return _textual_index_element(table, text_)
    else:
        raise ValueError("String or text() construct expected") 

# 需要导入模块: from sqlalchemy import types [as 别名]
# 或者: from sqlalchemy.types import NULLTYPE [as 别名]
def __init__(self, table, text):
        self.table = table
        self.text = text
        self.key = text.text
        self.fake_column = schema.Column(self.text.text, sqltypes.NULLTYPE)
        table.append_column(self.fake_column) 

# 需要导入模块: from sqlalchemy import types [as 别名]
# 或者: from sqlalchemy.types import NULLTYPE [as 别名]
def _setup_referent(self, metadata, constraint):
        spec = constraint.elements[0]._get_colspec()
        parts = spec.split(".")
        tname = parts[-2]
        if len(parts) == 3:
            referent_schema = parts[0]
        else:
            referent_schema = None

        if tname != self.temp_table_name:
            key = sql_schema._get_table_key(tname, referent_schema)
            if key in metadata.tables:
                t = metadata.tables[key]
                for elem in constraint.elements:
                    colname = elem._get_colspec().split(".")[-1]
                    if not t.c.contains_column(colname):
                        t.append_column(Column(colname, sqltypes.NULLTYPE))
            else:
                Table(
                    tname,
                    metadata,
                    *[
                        Column(n, sqltypes.NULLTYPE)
                        for n in [
                            elem._get_colspec().split(".")[-1]
                            for elem in constraint.elements
                        ]
                    ],
                    schema=referent_schema
                ) 

# 需要导入模块: from sqlalchemy import types [as 别名]
# 或者: from sqlalchemy.types import NULLTYPE [as 别名]
def primary_key_constraint(self, name, table_name, cols, schema=None):
        m = self.metadata()
        columns = [sa_schema.Column(n, NULLTYPE) for n in cols]
        t = sa_schema.Table(table_name, m, *columns, schema=schema)
        p = sa_schema.PrimaryKeyConstraint(*[t.c[n] for n in cols], name=name)
        t.append_constraint(p)
        return p 

# 需要导入模块: from sqlalchemy import types [as 别名]
# 或者: from sqlalchemy.types import NULLTYPE [as 别名]
def unique_constraint(self, name, source, local_cols, schema=None, **kw):
        t = sa_schema.Table(
            source,
            self.metadata(),
            *[sa_schema.Column(n, NULLTYPE) for n in local_cols],
            schema=schema
        )
        kw["name"] = name
        uq = sa_schema.UniqueConstraint(*[t.c[n] for n in local_cols], **kw)
        # TODO: need event tests to ensure the event
        # is fired off here
        t.append_constraint(uq)
        return uq 

# 需要导入模块: from sqlalchemy import types [as 别名]
# 或者: from sqlalchemy.types import NULLTYPE [as 别名]
def to_constraint(self, migration_context=None):
        if self._orig_constraint is not None:
            return self._orig_constraint
        schema_obj = schemaobj.SchemaObjects(migration_context)
        t = schema_obj.table(self.table_name, schema=self.schema)
        excl = ExcludeConstraint(
            *self.elements,
            name=self.constraint_name,
            where=self.where,
            **self.kw
        )
        for expr, name, oper in excl._render_exprs:
            t.append_column(Column(name, NULLTYPE))
        t.append_constraint(excl)
        return excl 

# 需要导入模块: from sqlalchemy import types [as 别名]
# 或者: from sqlalchemy.types import NULLTYPE [as 别名]
def test_skip_null_type_comparison_reflected(self):
        ac = ops.AlterColumnOp("sometable", "somecol")
        autogenerate.compare._compare_type(
            self.autogen_context,
            ac,
            None,
            "sometable",
            "somecol",
            Column("somecol", NULLTYPE),
            Column("somecol", Integer()),
        )
        diff = ac.to_diff_tuple()
        assert not diff 

# 需要导入模块: from sqlalchemy import types [as 别名]
# 或者: from sqlalchemy.types import NULLTYPE [as 别名]
def test_skip_null_type_comparison_local(self):
        ac = ops.AlterColumnOp("sometable", "somecol")
        autogenerate.compare._compare_type(
            self.autogen_context,
            ac,
            None,
            "sometable",
            "somecol",
            Column("somecol", Integer()),
            Column("somecol", NULLTYPE),
        )
        diff = ac.to_diff_tuple()
        assert not diff