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Observation

Bases: Base

Represents an observation.

This ORM class represents an observation. For the time being, apart from value (in string format) and timestamp, we store Foreign Keys pointing to the other dimension of the observations. These include, the abstract observable, sensor, unit of measurement and station.

Attributes:

Name Type Description
value

The measurement as string
timestamp

When the measurement was taken
junction_id

FK to the corresponding junction table. This tables holds further info about the corresponding unit of measurement, station and sensor
Source code in edam/reader/models/observation.py 
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class Observation(Base):
    """
    Represents an observation.

    This ORM class represents an observation. For the time being,
    apart from `value` (in string format) and `timestamp`, we store Foreign
    Keys pointing to the other dimension of the observations. These include,
    the abstract observable, sensor, unit of measurement and station.

    Attributes:
        value: The measurement as string
        timestamp: When the measurement was taken
        junction_id: FK to the corresponding junction table. This tables
            holds further info about the corresponding unit of measurement,
            station and sensor
    """
    __tablename__ = "Observation"
    id = Column(Integer, primary_key=True)
    timestamp = Column(DateTime)
    value = Column(String(60))
    junction_id = Column(Integer, ForeignKey('Junction.id'))

    def __init__(self, timestamp=None, value=None, junction_id=None):
        self.timestamp = timestamp
        self.value = value
        self.junction_id = junction_id

    def __repr__(self):
        return f'<{self.__class__.__name__} with id {self.id!r}>'