kopia lustrzana https://github.com/glidernet/ogn-python
57 wiersze
2.1 KiB
Python
57 wiersze
2.1 KiB
Python
from geoalchemy2.shape import to_shape
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from geoalchemy2.types import Geometry
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from .geo import Location
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from app import db
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from .airport import Airport
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class Receiver(db.Model):
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__tablename__ = "receivers"
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id = db.Column(db.Integer, primary_key=True)
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name = db.Column(db.String(9))
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location_wkt = db.Column("location", Geometry("POINT", srid=4326))
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altitude = db.Column(db.Float(precision=2))
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firstseen = db.Column(db.DateTime, index=True)
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lastseen = db.Column(db.DateTime, index=True)
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timestamp = db.Column(db.DateTime, index=True)
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version = db.Column(db.String)
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platform = db.Column(db.String)
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cpu_temp = db.Column(db.Float(precision=2))
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rec_input_noise = db.Column(db.Float(precision=2))
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agl = db.Column(db.Float(precision=2))
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# Relations
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country_id = db.Column(db.Integer, db.ForeignKey("countries.gid", ondelete="SET NULL"), index=True)
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country = db.relationship("Country", foreign_keys=[country_id], backref=db.backref("receivers", order_by="Receiver.name.asc()"))
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airport_id = db.Column(db.Integer, db.ForeignKey("airports.id", ondelete="CASCADE"), index=True)
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airport = db.relationship("Airport", foreign_keys=[airport_id], backref=db.backref("receivers", order_by="Receiver.name.asc()"))
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__table_args__ = (db.Index('idx_receivers_name_uc', 'name', unique=True), )
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@property
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def location(self):
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if self.location_wkt is None:
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return None
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coords = to_shape(self.location_wkt)
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return Location(lat=coords.y, lon=coords.x)
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def airports_nearby(self):
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query = (
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db.session.query(Airport, db.func.st_distance_sphere(self.location_wkt, Airport.location_wkt), db.func.st_azimuth(self.location_wkt, Airport.location_wkt))
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.filter(db.func.st_contains(db.func.st_buffer(Airport.location_wkt, 1), self.location_wkt))
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.filter(Airport.style.in_((2, 4, 5)))
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.order_by(db.func.st_distance_sphere(self.location_wkt, Airport.location_wkt).asc())
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.limit(5)
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)
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airports = [(airport, distance, azimuth) for airport, distance, azimuth in query]
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return airports
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