def _render_server_default_for_compare(metadata_default,
metadata_col, autogen_context):
rendered = _user_defined_render(
"server_default", metadata_default, autogen_context)
if rendered is not False:
return rendered
if isinstance(metadata_default, sa_schema.DefaultClause):
if isinstance(metadata_default.arg, compat.string_types):
metadata_default = metadata_default.arg
else:
metadata_default = str(metadata_default.arg.compile(
dialect=autogen_context.dialect))
if isinstance(metadata_default, compat.string_types):
if metadata_col.type._type_affinity is sqltypes.String:
metadata_default = re.sub(r"^'|'$", "", metadata_default)
return repr(metadata_default)
else:
return metadata_default
else:
return None
python类DefaultClause()的实例源码
def _render_server_default(default, autogen_context):
rendered = _user_defined_render("server_default", default, autogen_context)
if rendered is not False:
return rendered
if isinstance(default, sa_schema.DefaultClause):
if isinstance(default.arg, string_types):
default = default.arg
else:
default = str(default.arg.compile(
dialect=autogen_context['dialect']))
if isinstance(default, string_types):
# TODO: this is just a hack to get
# tests to pass until we figure out
# WTF sqlite is doing
default = re.sub(r"^'|'$", "", default)
return repr(default)
else:
return None
def _render_server_default_for_compare(metadata_default,
metadata_col, autogen_context):
rendered = _user_defined_render(
"server_default", metadata_default, autogen_context)
if rendered is not False:
return rendered
if isinstance(metadata_default, sa_schema.DefaultClause):
if isinstance(metadata_default.arg, compat.string_types):
metadata_default = metadata_default.arg
else:
metadata_default = str(metadata_default.arg.compile(
dialect=autogen_context.dialect))
if isinstance(metadata_default, compat.string_types):
if metadata_col.type._type_affinity is sqltypes.String:
metadata_default = re.sub(r"^'|'$", "", metadata_default)
return repr(metadata_default)
else:
return metadata_default
else:
return None
def _render_server_default_for_compare(metadata_default,
metadata_col, autogen_context):
rendered = _user_defined_render(
"server_default", metadata_default, autogen_context)
if rendered is not False:
return rendered
if isinstance(metadata_default, sa_schema.DefaultClause):
if isinstance(metadata_default.arg, compat.string_types):
metadata_default = metadata_default.arg
else:
metadata_default = str(metadata_default.arg.compile(
dialect=autogen_context.dialect))
if isinstance(metadata_default, compat.string_types):
if metadata_col.type._type_affinity is sqltypes.String:
metadata_default = re.sub(r"^'|'$", "", metadata_default)
return repr(metadata_default)
else:
return metadata_default
else:
return None
def _render_server_default(default, autogen_context):
rendered = _user_defined_render("server_default", default, autogen_context)
if rendered is not False:
return rendered
if isinstance(default, sa_schema.DefaultClause):
if isinstance(default.arg, string_types):
default = default.arg
else:
default = str(default.arg.compile(
dialect=autogen_context['dialect']))
if isinstance(default, string_types):
# TODO: this is just a hack to get
# tests to pass until we figure out
# WTF sqlite is doing
default = re.sub(r"^'|'$", "", default)
return repr(default)
else:
return None
def _render_server_default_for_compare(metadata_default,
metadata_col, autogen_context):
rendered = _user_defined_render(
"server_default", metadata_default, autogen_context)
if rendered is not False:
return rendered
if isinstance(metadata_default, sa_schema.DefaultClause):
if isinstance(metadata_default.arg, compat.string_types):
metadata_default = metadata_default.arg
else:
metadata_default = str(metadata_default.arg.compile(
dialect=autogen_context.dialect))
if isinstance(metadata_default, compat.string_types):
if metadata_col.type._type_affinity is sqltypes.String:
metadata_default = re.sub(r"^'|'$", "", metadata_default)
return repr(metadata_default)
else:
return metadata_default
else:
return None
def _render_server_default_for_compare(metadata_default,
metadata_col, autogen_context):
rendered = _user_defined_render(
"server_default", metadata_default, autogen_context)
if rendered is not False:
return rendered
if isinstance(metadata_default, sa_schema.DefaultClause):
if isinstance(metadata_default.arg, compat.string_types):
metadata_default = metadata_default.arg
else:
metadata_default = str(metadata_default.arg.compile(
dialect=autogen_context['dialect']))
if isinstance(metadata_default, compat.string_types):
if metadata_col.type._type_affinity is sqltypes.String:
metadata_default = re.sub(r"^'|'$", "", metadata_default)
return repr(metadata_default)
else:
return metadata_default
else:
return None
def _render_server_default_for_compare(metadata_default,
metadata_col, autogen_context):
rendered = _user_defined_render(
"server_default", metadata_default, autogen_context)
if rendered is not False:
return rendered
if isinstance(metadata_default, sa_schema.DefaultClause):
if isinstance(metadata_default.arg, compat.string_types):
metadata_default = metadata_default.arg
else:
metadata_default = str(metadata_default.arg.compile(
dialect=autogen_context.dialect))
if isinstance(metadata_default, compat.string_types):
if metadata_col.type._type_affinity is sqltypes.String:
metadata_default = re.sub(r"^'|'$", "", metadata_default)
return repr(metadata_default)
else:
return metadata_default
else:
return None
def _render_server_default_for_compare(metadata_default,
metadata_col, autogen_context):
rendered = _user_defined_render(
"server_default", metadata_default, autogen_context)
if rendered is not False:
return rendered
if isinstance(metadata_default, sa_schema.DefaultClause):
if isinstance(metadata_default.arg, compat.string_types):
metadata_default = metadata_default.arg
else:
metadata_default = str(metadata_default.arg.compile(
dialect=autogen_context.dialect))
if isinstance(metadata_default, compat.string_types):
if metadata_col.type._type_affinity is sqltypes.String:
metadata_default = re.sub(r"^'|'$", "", metadata_default)
return repr(metadata_default)
else:
return metadata_default
else:
return None
def _render_server_default_for_compare(metadata_default,
metadata_col, autogen_context):
rendered = _user_defined_render(
"server_default", metadata_default, autogen_context)
if rendered is not False:
return rendered
if isinstance(metadata_default, sa_schema.DefaultClause):
if isinstance(metadata_default.arg, compat.string_types):
metadata_default = metadata_default.arg
else:
metadata_default = str(metadata_default.arg.compile(
dialect=autogen_context.dialect))
if isinstance(metadata_default, compat.string_types):
if metadata_col.type._type_affinity is sqltypes.String:
metadata_default = re.sub(r"^'|'$", "", metadata_default)
return repr(metadata_default)
else:
return metadata_default
else:
return None
def _render_server_default_for_compare(metadata_default,
metadata_col, autogen_context):
rendered = _user_defined_render(
"server_default", metadata_default, autogen_context)
if rendered is not False:
return rendered
if isinstance(metadata_default, sa_schema.DefaultClause):
if isinstance(metadata_default.arg, compat.string_types):
metadata_default = metadata_default.arg
else:
metadata_default = str(metadata_default.arg.compile(
dialect=autogen_context.dialect))
if isinstance(metadata_default, compat.string_types):
if metadata_col.type._type_affinity is sqltypes.String:
metadata_default = re.sub(r"^'|'$", "", metadata_default)
return repr(metadata_default)
else:
return metadata_default
else:
return None
def _render_server_default_for_compare(metadata_default,
metadata_col, autogen_context):
rendered = _user_defined_render(
"server_default", metadata_default, autogen_context)
if rendered is not False:
return rendered
if isinstance(metadata_default, sa_schema.DefaultClause):
if isinstance(metadata_default.arg, compat.string_types):
metadata_default = metadata_default.arg
else:
metadata_default = str(metadata_default.arg.compile(
dialect=autogen_context.dialect))
if isinstance(metadata_default, compat.string_types):
if metadata_col.type._type_affinity is sqltypes.String:
metadata_default = re.sub(r"^'|'$", "", metadata_default)
return repr(metadata_default)
else:
return metadata_default
else:
return None
def _render_server_default(default, autogen_context, repr_=True):
rendered = _user_defined_render("server_default", default, autogen_context)
if rendered is not False:
return rendered
if isinstance(default, sa_schema.DefaultClause):
if isinstance(default.arg, compat.string_types):
default = default.arg
else:
return _render_potential_expr(default.arg, autogen_context)
if isinstance(default, string_types) and repr_:
default = repr(re.sub(r"^'|'$", "", default))
return default
def alter_column(self, table_name, column_name,
nullable=None,
server_default=False,
name=None,
type_=None,
autoincrement=None,
**kw
):
existing = self.columns[column_name]
existing_transfer = self.column_transfers[column_name]
if name is not None and name != column_name:
# note that we don't change '.key' - we keep referring
# to the renamed column by its old key in _create(). neat!
existing.name = name
existing_transfer["name"] = name
if type_ is not None:
type_ = sqltypes.to_instance(type_)
# old type is being discarded so turn off eventing
# rules. Alternatively we can
# erase the events set up by this type, but this is simpler.
# we also ignore the drop_constraint that will come here from
# Operations.implementation_for(alter_column)
if isinstance(existing.type, SchemaEventTarget):
existing.type._create_events = \
existing.type.create_constraint = False
existing.type = type_
# we *dont* however set events for the new type, because
# alter_column is invoked from
# Operations.implementation_for(alter_column) which already
# will emit an add_constraint()
existing_transfer["expr"] = cast(existing_transfer["expr"], type_)
if nullable is not None:
existing.nullable = nullable
if server_default is not False:
sql_schema.DefaultClause(server_default)._set_parent(existing)
if autoincrement is not None:
existing.autoincrement = bool(autoincrement)
def _render_server_default(default, autogen_context, repr_=True):
rendered = _user_defined_render("server_default", default, autogen_context)
if rendered is not False:
return rendered
if isinstance(default, sa_schema.DefaultClause):
if isinstance(default.arg, compat.string_types):
default = default.arg
else:
return _render_potential_expr(default.arg, autogen_context)
if isinstance(default, string_types) and repr_:
default = repr(re.sub(r"^'|'$", "", default))
return default
def _render_server_default(default, autogen_context, repr_=True):
rendered = _user_defined_render("server_default", default, autogen_context)
if rendered is not False:
return rendered
if isinstance(default, sa_schema.DefaultClause):
if isinstance(default.arg, compat.string_types):
default = default.arg
else:
return _render_potential_expr(default.arg, autogen_context)
if isinstance(default, string_types) and repr_:
default = repr(re.sub(r"^'|'$", "", default))
return default
def get_column_default_string(self, column):
if (isinstance(column.server_default, schema.DefaultClause) and
isinstance(column.server_default.arg, basestring)):
if isinstance(column.type, (sqltypes.Integer, sqltypes.Numeric)):
return self.sql_compiler.process(text(column.server_default.arg))
return super(InfoDDLCompiler, self).get_column_default_string(column)
### Informix wants the constraint name at the end, hence this ist c&p from sql/compiler.py
def _render_server_default(default, autogen_context, repr_=True):
rendered = _user_defined_render("server_default", default, autogen_context)
if rendered is not False:
return rendered
if isinstance(default, sa_schema.DefaultClause):
if isinstance(default.arg, compat.string_types):
default = default.arg
else:
return _render_potential_expr(default.arg, autogen_context)
if isinstance(default, string_types) and repr_:
default = repr(re.sub(r"^'|'$", "", default))
return default
def _render_server_default(default, autogen_context, repr_=True):
rendered = _user_defined_render("server_default", default, autogen_context)
if rendered is not False:
return rendered
if isinstance(default, sa_schema.DefaultClause):
if isinstance(default.arg, compat.string_types):
default = default.arg
else:
return _render_potential_expr(default.arg, autogen_context)
if isinstance(default, string_types) and repr_:
default = repr(re.sub(r"^'|'$", "", default))
return default
def _render_server_default(default, autogen_context, repr_=True):
rendered = _user_defined_render("server_default", default, autogen_context)
if rendered is not False:
return rendered
if isinstance(default, sa_schema.DefaultClause):
if isinstance(default.arg, compat.string_types):
default = default.arg
else:
return _render_potential_expr(default.arg, autogen_context)
if isinstance(default, string_types) and repr_:
default = repr(re.sub(r"^'|'$", "", default))
return default
def _render_server_default(default, autogen_context, repr_=True):
rendered = _user_defined_render("server_default", default, autogen_context)
if rendered is not False:
return rendered
if isinstance(default, sa_schema.DefaultClause):
if isinstance(default.arg, compat.string_types):
default = default.arg
else:
return _render_potential_expr(default.arg, autogen_context)
if isinstance(default, string_types) and repr_:
default = repr(re.sub(r"^'|'$", "", default))
return default
def _render_server_default(default, autogen_context, repr_=True):
rendered = _user_defined_render("server_default", default, autogen_context)
if rendered is not False:
return rendered
if isinstance(default, sa_schema.DefaultClause):
if isinstance(default.arg, compat.string_types):
default = default.arg
else:
return _render_potential_expr(default.arg, autogen_context)
if isinstance(default, string_types) and repr_:
default = repr(re.sub(r"^'|'$", "", default))
return default
def _render_server_default(default, autogen_context, repr_=True):
rendered = _user_defined_render("server_default", default, autogen_context)
if rendered is not False:
return rendered
if isinstance(default, sa_schema.DefaultClause):
if isinstance(default.arg, compat.string_types):
default = default.arg
else:
return _render_potential_expr(default.arg, autogen_context)
if isinstance(default, string_types) and repr_:
default = repr(re.sub(r"^'|'$", "", default))
return default
def _render_server_default(default, autogen_context, repr_=True):
rendered = _user_defined_render("server_default", default, autogen_context)
if rendered is not False:
return rendered
if isinstance(default, sa_schema.DefaultClause):
if isinstance(default.arg, compat.string_types):
default = default.arg
else:
return _render_potential_expr(default.arg, autogen_context)
if isinstance(default, string_types) and repr_:
default = repr(re.sub(r"^'|'$", "", default))
return default
def alter_column(self, table_name, column_name,
nullable=None,
server_default=False,
name=None,
type_=None,
autoincrement=None,
**kw
):
existing = self.columns[column_name]
existing_transfer = self.column_transfers[column_name]
if name is not None and name != column_name:
# note that we don't change '.key' - we keep referring
# to the renamed column by its old key in _create(). neat!
existing.name = name
existing_transfer["name"] = name
if type_ is not None:
type_ = sqltypes.to_instance(type_)
# old type is being discarded so turn off eventing
# rules. Alternatively we can
# erase the events set up by this type, but this is simpler.
# we also ignore the drop_constraint that will come here from
# Operations.implementation_for(alter_column)
if isinstance(existing.type, SchemaEventTarget):
existing.type._create_events = \
existing.type.create_constraint = False
existing.type = type_
# we *dont* however set events for the new type, because
# alter_column is invoked from
# Operations.implementation_for(alter_column) which already
# will emit an add_constraint()
existing_transfer["expr"] = cast(existing_transfer["expr"], type_)
if nullable is not None:
existing.nullable = nullable
if server_default is not False:
if server_default is None:
existing.server_default = None
else:
sql_schema.DefaultClause(server_default)._set_parent(existing)
if autoincrement is not None:
existing.autoincrement = bool(autoincrement)
def alter_column(self, table_name, column_name,
nullable=None,
server_default=False,
name=None,
type_=None,
autoincrement=None,
**kw
):
existing = self.columns[column_name]
existing_transfer = self.column_transfers[column_name]
if name is not None and name != column_name:
# note that we don't change '.key' - we keep referring
# to the renamed column by its old key in _create(). neat!
existing.name = name
existing_transfer["name"] = name
if type_ is not None:
type_ = sqltypes.to_instance(type_)
# old type is being discarded so turn off eventing
# rules. Alternatively we can
# erase the events set up by this type, but this is simpler.
# we also ignore the drop_constraint that will come here from
# Operations.implementation_for(alter_column)
if isinstance(existing.type, SchemaEventTarget):
existing.type._create_events = \
existing.type.create_constraint = False
if existing.type._type_affinity is not type_._type_affinity:
existing_transfer["expr"] = cast(
existing_transfer["expr"], type_)
existing.type = type_
# we *dont* however set events for the new type, because
# alter_column is invoked from
# Operations.implementation_for(alter_column) which already
# will emit an add_constraint()
if nullable is not None:
existing.nullable = nullable
if server_default is not False:
if server_default is None:
existing.server_default = None
else:
sql_schema.DefaultClause(server_default)._set_parent(existing)
if autoincrement is not None:
existing.autoincrement = bool(autoincrement)
def alter_column(self, table_name, column_name,
nullable=None,
server_default=False,
name=None,
type_=None,
autoincrement=None,
**kw
):
existing = self.columns[column_name]
existing_transfer = self.column_transfers[column_name]
if name is not None and name != column_name:
# note that we don't change '.key' - we keep referring
# to the renamed column by its old key in _create(). neat!
existing.name = name
existing_transfer["name"] = name
if type_ is not None:
type_ = sqltypes.to_instance(type_)
# old type is being discarded so turn off eventing
# rules. Alternatively we can
# erase the events set up by this type, but this is simpler.
# we also ignore the drop_constraint that will come here from
# Operations.implementation_for(alter_column)
if isinstance(existing.type, SchemaEventTarget):
existing.type._create_events = \
existing.type.create_constraint = False
existing.type = type_
# we *dont* however set events for the new type, because
# alter_column is invoked from
# Operations.implementation_for(alter_column) which already
# will emit an add_constraint()
existing_transfer["expr"] = cast(existing_transfer["expr"], type_)
if nullable is not None:
existing.nullable = nullable
if server_default is not False:
if server_default is None:
existing.server_default = None
else:
sql_schema.DefaultClause(server_default)._set_parent(existing)
if autoincrement is not None:
existing.autoincrement = bool(autoincrement)
def alter_column(self, table_name, column_name,
nullable=None,
server_default=False,
name=None,
type_=None,
autoincrement=None,
**kw
):
existing = self.columns[column_name]
existing_transfer = self.column_transfers[column_name]
if name is not None and name != column_name:
# note that we don't change '.key' - we keep referring
# to the renamed column by its old key in _create(). neat!
existing.name = name
existing_transfer["name"] = name
if type_ is not None:
type_ = sqltypes.to_instance(type_)
# old type is being discarded so turn off eventing
# rules. Alternatively we can
# erase the events set up by this type, but this is simpler.
# we also ignore the drop_constraint that will come here from
# Operations.implementation_for(alter_column)
if isinstance(existing.type, SchemaEventTarget):
existing.type._create_events = \
existing.type.create_constraint = False
if existing.type._type_affinity is not type_._type_affinity:
existing_transfer["expr"] = cast(
existing_transfer["expr"], type_)
existing.type = type_
# we *dont* however set events for the new type, because
# alter_column is invoked from
# Operations.implementation_for(alter_column) which already
# will emit an add_constraint()
if nullable is not None:
existing.nullable = nullable
if server_default is not False:
if server_default is None:
existing.server_default = None
else:
sql_schema.DefaultClause(server_default)._set_parent(existing)
if autoincrement is not None:
existing.autoincrement = bool(autoincrement)
def alter_column(self, table_name, column_name,
nullable=None,
server_default=False,
name=None,
type_=None,
autoincrement=None,
**kw
):
existing = self.columns[column_name]
existing_transfer = self.column_transfers[column_name]
if name is not None and name != column_name:
# note that we don't change '.key' - we keep referring
# to the renamed column by its old key in _create(). neat!
existing.name = name
existing_transfer["name"] = name
if type_ is not None:
type_ = sqltypes.to_instance(type_)
# old type is being discarded so turn off eventing
# rules. Alternatively we can
# erase the events set up by this type, but this is simpler.
# we also ignore the drop_constraint that will come here from
# Operations.implementation_for(alter_column)
if isinstance(existing.type, SchemaEventTarget):
existing.type._create_events = \
existing.type.create_constraint = False
if existing.type._type_affinity is not type_._type_affinity:
existing_transfer["expr"] = cast(
existing_transfer["expr"], type_)
existing.type = type_
# we *dont* however set events for the new type, because
# alter_column is invoked from
# Operations.implementation_for(alter_column) which already
# will emit an add_constraint()
if nullable is not None:
existing.nullable = nullable
if server_default is not False:
if server_default is None:
existing.server_default = None
else:
sql_schema.DefaultClause(server_default)._set_parent(existing)
if autoincrement is not None:
existing.autoincrement = bool(autoincrement)
def alter_column(self, table_name, column_name,
nullable=None,
server_default=False,
name=None,
type_=None,
autoincrement=None,
**kw
):
existing = self.columns[column_name]
existing_transfer = self.column_transfers[column_name]
if name is not None and name != column_name:
# note that we don't change '.key' - we keep referring
# to the renamed column by its old key in _create(). neat!
existing.name = name
existing_transfer["name"] = name
if type_ is not None:
type_ = sqltypes.to_instance(type_)
# old type is being discarded so turn off eventing
# rules. Alternatively we can
# erase the events set up by this type, but this is simpler.
# we also ignore the drop_constraint that will come here from
# Operations.implementation_for(alter_column)
if isinstance(existing.type, SchemaEventTarget):
existing.type._create_events = \
existing.type.create_constraint = False
if existing.type._type_affinity is not type_._type_affinity:
existing_transfer["expr"] = cast(
existing_transfer["expr"], type_)
existing.type = type_
# we *dont* however set events for the new type, because
# alter_column is invoked from
# Operations.implementation_for(alter_column) which already
# will emit an add_constraint()
if nullable is not None:
existing.nullable = nullable
if server_default is not False:
if server_default is None:
existing.server_default = None
else:
sql_schema.DefaultClause(server_default)._set_parent(existing)
if autoincrement is not None:
existing.autoincrement = bool(autoincrement)
