PyScada/PyScada-Influxdb
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fixed last_value

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Martin Schroeder 2026-01-28 21:23:27 +00:00
parent 327fd9c5f1
commit e67559e136
1 changed files with 5 additions and 4 deletions
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pyscada/influxdb/models.py
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@ -107,13 +107,14 @@ class InfluxDatabase(models.Model):
use_date_saved = ( use_date_saved = (
kwargs.pop("use_date_saved") if "use_date_saved" in kwargs else False kwargs.pop("use_date_saved") if "use_date_saved" in kwargs else False
) )
query = f'from(bucket: "{self.bucket}") |> range(start: {self.to_flux_time(time_min)}) |> filter(fn:(r) => r._measurement == "{self.measurement_name}" ) |> filter(fn:(r) => r.variable_id == "{variable_id}") |> filter(fn:(r) => r._field == "value") |> keep(columns: ["_time","_value"]) |> last()' start_time = "-24h"
r = query_api.query(query) query = f'from(bucket: "{self.bucket}") |> range(start: {start_time}) |> filter(fn:(r) => r._measurement == "{self.measurement_name}" ) |> filter(fn:(r) => r.variable_id == "{variable.pk}") |> filter(fn:(r) => r._field == "value") |> keep(columns: ["_time","_value"]) |> last()'
r = r.to_values(columns=['_time','_value'])[0] r = self.get_query_api().query(query)
r = r.to_values(columns=['_time','_value'])
if len(r) == 0: if len(r) == 0:
return None return None
return [r[-1][0].timestamp(), r[-1][1]] return [r[0][0].timestamp(), r[0][1]]
def read_multiple(self, **kwargs): def read_multiple(self, **kwargs):