fix db schema

requirements.txt

@@ -9,3 +9,4 @@ marshmallow-sqlalchemy
 flask-marshmallow
 paho-mqtt
 flask-mqtt
+psycopg2-binary

src/models.py

@@ -28,7 +28,6 @@ class SensorStatusEnum(enum.Enum):
 class Device(db.Model):
     __tablename__ = 'device'
     id = db.Column(db.Integer, primary_key=True)
-    sensorid = db.Column(db.String, nullable=True)
     status = db.Column(db.Enum(DeviceStatusEnum), nullable=False)
     url = db.Column(db.String, nullable=False)
     lastupdate = db.Column(db.TIMESTAMP, nullable=False, server_default=func.now(), onupdate=func.current_timestamp())
@@ -37,6 +36,7 @@ class Device(db.Model):
 
 class Sensor(db.Model):
     __tablename__ = 'sensor'
-    id = db.Column(db.String, primary_key=True)
+    id = db.Column(db.Integer, primary_key=True)
+    sensorid = db.Column(db.String, nullable=False)
     status = db.Column(db.Enum(SensorStatusEnum), nullable=False)
     device_id = db.Column(db.String, db.ForeignKey('device.id'))