def _build_repeat_iteration_indicator(spec, context):
return RawIndicator("base document iteration",
Column(
id="repeat_iteration",
datatype="integer",
is_nullable=False,
is_primary_key=True,
),
getter=lambda doc, ctx: ctx.iteration)
def _build_inserted_at(spec, context):
return RawIndicator("inserted at",
Column(
id="inserted_at",
datatype="datetime",
is_nullable=False,
is_primary_key=False,
),
getter=lambda doc, ctx: ctx.inserted_timestamp)
def _build_raw_indicator(spec, context):
wrapped = RawIndicatorSpec.wrap(spec)
column = Column(
id=wrapped.column_id,
datatype=wrapped.datatype,
is_nullable=wrapped.is_nullable,
is_primary_key=wrapped.is_primary_key,
)
return RawIndicator(wrapped.display_name, column, getter=wrapped.getter)
def to_ucr_column_spec(self):
"""
:return: a UCR-compatible `Column` object that can be used to be converted to sqlalchemy tables
"""
return Column(
id=self.column_id,
datatype=self.get_datatype(),
is_nullable=self.is_nullable(),
is_primary_key=self.is_primary_key(),
create_index=self.create_index(),
)
def _build_expression_indicator(spec, context):
wrapped = ExpressionIndicatorSpec.wrap(spec)
column = Column(
id=wrapped.column_id,
datatype=wrapped.datatype,
is_nullable=wrapped.is_nullable,
is_primary_key=wrapped.is_primary_key,
)
return RawIndicator(
wrapped.display_name,
column,
getter=wrapped.parsed_expression(context),
)