114 lines
4.8 KiB
Python
114 lines
4.8 KiB
Python
from django.db import models
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from decimal import Decimal
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class Multiplexor(models.Model):
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"""Устройство-мультиплексор"""
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name = models.CharField(max_length=50, unique=True)
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ip = models.GenericIPAddressField(null=True, blank=True)
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subnet = models.GenericIPAddressField(null=True, blank=True)
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gateway = models.GenericIPAddressField(null=True, blank=True)
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sd_path = models.CharField(max_length=255, null=True, blank=True)
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def __str__(self):
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return self.name
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class Channel(models.Model):
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"""Физический канал мультиплексора"""
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multiplexor = models.ForeignKey(Multiplexor, on_delete=models.CASCADE, related_name="channels")
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number = models.PositiveSmallIntegerField() # CH-1 ... CH-14
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# для "полканалов" можно использовать дробное значение (1, 1.5, 2, ...)
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position = models.DecimalField(max_digits=4, decimal_places=1, default=Decimal("1.0"))
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class Meta:
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unique_together = ("multiplexor", "number", "position")
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def __str__(self):
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return f"{self.multiplexor.name} - CH{self.number} ({self.position})"
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class SensorType(models.Model):
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"""Тип датчика: GA, PE, GLE"""
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code = models.CharField(max_length=10, unique=True) # GA, PE, GLE
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name = models.CharField(max_length=100)
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description = models.TextField(blank=True, null=True)
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# пороговые значения для всех сенсоров этого типа
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min_value = models.DecimalField(max_digits=12, decimal_places=4, null=True, blank=True)
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max_value = models.DecimalField(max_digits=12, decimal_places=4, null=True, blank=True)
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def __str__(self):
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return self.code
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class SignalFormat(models.Model):
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"""Формат сигнала и правило преобразования"""
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sensor_type = models.ForeignKey(SensorType, on_delete=models.CASCADE, related_name="formats")
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code = models.CharField(max_length=50) # например "4-20мА", "VW f<1600Hz", "NTC R>250Ohm"
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unit = models.CharField(max_length=20, blank=True, null=True) # °C, мкм/м, мм и т.п.
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conversion_rule = models.CharField(max_length=255, blank=True, null=True)
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class Meta:
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unique_together = ("sensor_type", "code")
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def __str__(self):
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return f"{self.sensor_type.code} - {self.code}"
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class Sensor(models.Model):
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"""Конкретный датчик, установленный в канале"""
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channel = models.ForeignKey(Channel, on_delete=models.CASCADE, related_name="sensors")
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sensor_type = models.ForeignKey(SensorType, on_delete=models.CASCADE)
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signal_format = models.ForeignKey(SignalFormat, on_delete=models.SET_NULL, null=True, blank=True)
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serial_number = models.CharField(max_length=50, blank=True, null=True) # CL 2106009
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name = models.CharField(max_length=50, blank=True, null=True) # GA-1, HLE-1 и т.п.
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def __str__(self):
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return f"{self.name or self.sensor_type.code} ({self.serial_number})"
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class Metric(models.Model):
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"""Значения, которые приходят из CSV"""
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timestamp = models.DateTimeField()
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sensor = models.ForeignKey(Sensor, on_delete=models.CASCADE, related_name="metrics")
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raw_value = models.CharField(max_length=50) # исходное значение из файла (например "11.964 (A)")
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value = models.FloatField(null=True, blank=True) # преобразованное значение
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status = models.CharField(max_length=20, blank=True, null=True) # No Rx, Error, NotAv и т.д.
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class Meta:
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indexes = [
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models.Index(fields=["timestamp"]),
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models.Index(fields=["sensor"]),
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]
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def __str__(self):
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return f"{self.timestamp} {self.sensor} = {self.value} {self.sensor.signal_format.unit if self.sensor.signal_format else ''}"
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class Alert(models.Model):
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"""Тревоги по метрикам"""
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sensor = models.ForeignKey(Sensor, on_delete=models.CASCADE, related_name="alerts")
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metric = models.ForeignKey(Metric, on_delete=models.CASCADE, related_name="alerts")
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sensor_type = models.ForeignKey(SensorType, on_delete=models.CASCADE, related_name="alerts")
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message = models.CharField(max_length=255)
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severity = models.CharField(
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max_length=20,
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choices=[
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("warning", "Warning"),
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("critical", "Critical"),
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],
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default="warning"
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)
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created_at = models.DateTimeField(auto_now_add=True)
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resolved = models.BooleanField(default=False)
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class Meta:
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indexes = [
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models.Index(fields=["created_at"]),
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models.Index(fields=["sensor"]),
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models.Index(fields=["sensor_type"]),
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]
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def __str__(self):
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return f"ALERT {self.sensor} @ {self.metric.timestamp}: {self.message}" |