fix: async write prec where DEFAULT_PRECISION should not be used (#675)

* fix: (WIP) issue 669 write precision to default in async API

* chore: fix lint issues

* docs: update CHANGELOG.md

* chore: improve indexing of range

Author: karel-rehor

CHANGELOG.md

@@ -1,8 +1,10 @@
 ## 1.47.0 [unreleased]
 
 ### Bug Fixes
-1. [#672](https://github.com/influxdata/influxdb-client-python/pull/672): Add type validation to url attribute in client object
-1. [#674](https://github.com/influxdata/influxdb-client-python/pull/674): Add type linting to client.flux_table.FluxTable, remove duplicated `from pathlib import Path` at setup.py
+
+1. [#672](https://github.com/influxdata/influxdb-client-python/pull/672): Adding type validation to url attribute in client object
+2. [#674](https://github.com/influxdata/influxdb-client-python/pull/674): Add type linting to client.flux_table.FluxTable, remove duplicated `from pathlib import Path` at setup.py
+3. [#675](https://github.com/influxdata/influxdb-client-python/pull/675): Ensures WritePrecision in Point is preferred to `DEFAULT_PRECISION`
 
 ## 1.46.0 [2024-09-13]
 

influxdb_client/client/write_api_async.py

@@ -1,5 +1,6 @@
 """Collect and async write time series data to InfluxDB Cloud or InfluxDB OSS."""
 import logging
+from asyncio import ensure_future, gather
 from collections import defaultdict
 from typing import Union, Iterable, NamedTuple
 
@@ -114,12 +115,20 @@ async def write(self, bucket: str, org: str = None,
         self._append_default_tags(record)
 
         payloads = defaultdict(list)
-        self._serialize(record, write_precision, payloads, precision_from_point=False, **kwargs)
-
-        # joint list by \n
-        body = b'\n'.join(payloads[write_precision])
-        response = await self._write_service.post_write_async(org=org, bucket=bucket, body=body,
-                                                              precision=write_precision, async_req=False,
-                                                              _return_http_data_only=False,
-                                                              content_type="text/plain; charset=utf-8")
-        return response[1] in (201, 204)
+        self._serialize(record, write_precision, payloads, precision_from_point=True, **kwargs)
+
+        futures = []
+        for payload_precision, payload_line in payloads.items():
+            futures.append(ensure_future
+                           (self._write_service.post_write_async(org=org, bucket=bucket,
+                                                                 body=b'\n'.join(payload_line),
+                                                                 precision=payload_precision, async_req=False,
+                                                                 _return_http_data_only=False,
+                                                                 content_type="text/plain; charset=utf-8")))
+
+        results = await gather(*futures, return_exceptions=True)
+        for result in results:
+            if isinstance(result, Exception):
+                raise result
+
+        return False not in [re[1] in (201, 204) for re in results]

tests/test_InfluxDBClientAsync.py

@@ -1,11 +1,15 @@
 import asyncio
+import dateutil.parser
 import logging
+import math
 import re
+import time
 import unittest
 import os
 from datetime import datetime, timezone
 from io import StringIO
 
+import pandas
 import pytest
 import warnings
 from aioresponses import aioresponses
@@ -199,30 +203,151 @@ async def test_write_empty_data(self):
 
         self.assertEqual(True, response)
 
+    def gen_fractional_utc(self, nano, precision) -> str:
+        raw_sec = nano / 1_000_000_000
+        if precision == WritePrecision.NS:
+            rem = f"{nano % 1_000_000_000}".rjust(9,"0").rstrip("0")
+            return (datetime.fromtimestamp(math.floor(raw_sec), tz=timezone.utc)
+                    .isoformat()
+                    .replace("+00:00", "") + f".{rem}Z")
+                    #f".{rem}Z"))
+        elif precision == WritePrecision.US:
+            # rem = f"{round(nano / 1_000) % 1_000_000}"#.ljust(6,"0")
+            return (datetime.fromtimestamp(round(raw_sec,6), tz=timezone.utc)
+                    .isoformat()
+                    .replace("+00:00","")
+                    .strip("0") + "Z"
+                    )
+        elif precision == WritePrecision.MS:
+            #rem = f"{round(nano / 1_000_000) % 1_000}".rjust(3, "0")
+            return (datetime.fromtimestamp(round(raw_sec,3), tz=timezone.utc)
+                    .isoformat()
+                    .replace("+00:00","")
+                    .strip("0") + "Z"
+                    )
+        elif precision == WritePrecision.S:
+            return (datetime.fromtimestamp(round(raw_sec), tz=timezone.utc)
+                    .isoformat()
+                    .replace("+00:00","Z"))
+        else:
+            raise ValueError(f"Unknown precision: {precision}")
+
+
     @async_test
     async def test_write_points_different_precision(self):
+        now_ns = time.time_ns()
+        now_us = now_ns / 1_000
+        now_ms = now_us / 1_000
+        now_s = now_ms / 1_000
+
+        now_date_s = self.gen_fractional_utc(now_ns, WritePrecision.S)
+        now_date_ms = self.gen_fractional_utc(now_ns, WritePrecision.MS)
+        now_date_us = self.gen_fractional_utc(now_ns, WritePrecision.US)
+        now_date_ns = self.gen_fractional_utc(now_ns, WritePrecision.NS)
+
+        points = {
+            WritePrecision.S: [],
+            WritePrecision.MS: [],
+            WritePrecision.US: [],
+            WritePrecision.NS: []
+        }
+
+        expected = {}
+
         measurement = generate_name("measurement")
-        _point1 = Point(measurement).tag("location", "Prague").field("temperature", 25.3) \
-            .time(datetime.fromtimestamp(0, tz=timezone.utc), write_precision=WritePrecision.S)
-        _point2 = Point(measurement).tag("location", "New York").field("temperature", 24.3) \
-            .time(datetime.fromtimestamp(1, tz=timezone.utc), write_precision=WritePrecision.MS)
-        _point3 = Point(measurement).tag("location", "Berlin").field("temperature", 24.3) \
-            .time(datetime.fromtimestamp(2, tz=timezone.utc), write_precision=WritePrecision.NS)
-        await self.client.write_api().write(bucket="my-bucket", record=[_point1, _point2, _point3],
+        # basic date-time value
+        points[WritePrecision.S].append(Point(measurement).tag("method", "SecDateTime").field("temperature", 25.3) \
+            .time(datetime.fromtimestamp(round(now_s), tz=timezone.utc), write_precision=WritePrecision.S))
+        expected['SecDateTime'] = now_date_s
+        points[WritePrecision.MS].append(Point(measurement).tag("method", "MilDateTime").field("temperature", 24.3) \
+            .time(datetime.fromtimestamp(round(now_s,3), tz=timezone.utc), write_precision=WritePrecision.MS))
+        expected['MilDateTime'] = now_date_ms
+        points[WritePrecision.US].append(Point(measurement).tag("method", "MicDateTime").field("temperature", 24.3) \
+            .time(datetime.fromtimestamp(round(now_s,6), tz=timezone.utc), write_precision=WritePrecision.US))
+        expected['MicDateTime'] = now_date_us
+        # N.B. datetime does not handle nanoseconds
+#        points[WritePrecision.NS].append(Point(measurement).tag("method", "NanDateTime").field("temperature", 24.3) \
+#            .time(datetime.fromtimestamp(now_s, tz=timezone.utc), write_precision=WritePrecision.NS))
+
+        # long timestamps based on POSIX time
+        points[WritePrecision.S].append(Point(measurement).tag("method", "SecPosix").field("temperature", 24.3) \
+            .time(round(now_s), write_precision=WritePrecision.S))
+        expected['SecPosix'] = now_date_s
+        points[WritePrecision.MS].append(Point(measurement).tag("method", "MilPosix").field("temperature", 24.3) \
+            .time(round(now_ms), write_precision=WritePrecision.MS))
+        expected['MilPosix'] = now_date_ms
+        points[WritePrecision.US].append(Point(measurement).tag("method", "MicPosix").field("temperature", 24.3) \
+            .time(round(now_us), write_precision=WritePrecision.US))
+        expected['MicPosix'] = now_date_us
+        points[WritePrecision.NS].append(Point(measurement).tag("method", "NanPosix").field("temperature", 24.3) \
+            .time(now_ns, write_precision=WritePrecision.NS))
+        expected['NanPosix'] = now_date_ns
+
+        # ISO Zulu datetime with ms, us and ns e.g. "2024-09-27T13:17:16.412399728Z"
+        points[WritePrecision.S].append(Point(measurement).tag("method", "SecDTZulu").field("temperature", 24.3) \
+            .time(now_date_s, write_precision=WritePrecision.S))
+        expected['SecDTZulu'] = now_date_s
+        points[WritePrecision.MS].append(Point(measurement).tag("method", "MilDTZulu").field("temperature", 24.3) \
+            .time(now_date_ms, write_precision=WritePrecision.MS))
+        expected['MilDTZulu'] = now_date_ms
+        points[WritePrecision.US].append(Point(measurement).tag("method", "MicDTZulu").field("temperature", 24.3) \
+            .time(now_date_us, write_precision=WritePrecision.US))
+        expected['MicDTZulu'] = now_date_us
+        # This keeps resulting in micro second resolution in response
+#        points[WritePrecision.NS].append(Point(measurement).tag("method", "NanDTZulu").field("temperature", 24.3) \
+#            .time(now_date_ns, write_precision=WritePrecision.NS))
+
+        recs = [x for x in [v for v in points.values()]]
+
+        await self.client.write_api().write(bucket="my-bucket", record=recs,
                                             write_precision=WritePrecision.NS)
         query = f'''
                     from(bucket:"my-bucket") 
                         |> range(start: 0)
                         |> filter(fn: (r) => r["_measurement"] == "{measurement}") 
-                        |> keep(columns: ["_time"])
+                        |> keep(columns: ["method","_time"])
                 '''
         query_api = self.client.query_api()
 
+        # ensure calls fully processed on server
+        await asyncio.sleep(1)
+
         raw = await query_api.query_raw(query)
-        self.assertEqual(8, len(raw.splitlines()))
-        self.assertEqual(',,0,1970-01-01T00:00:02Z', raw.splitlines()[4])
-        self.assertEqual(',,0,1970-01-01T00:00:01Z', raw.splitlines()[5])
-        self.assertEqual(',,0,1970-01-01T00:00:00Z', raw.splitlines()[6])
+        linesRaw = raw.splitlines()[4:]
+
+        lines = []
+        for lnr in linesRaw:
+            lines.append(lnr[2:].split(","))
+
+        def get_time_for_method(lines, method):
+            for l in lines:
+                if l[2] == method:
+                    return l[1]
+            return ""
+
+        self.assertEqual(15, len(raw.splitlines()))
+
+        for key in expected:
+            t = get_time_for_method(lines,key)
+            comp_time = dateutil.parser.isoparse(get_time_for_method(lines,key))
+            target_time = dateutil.parser.isoparse(expected[key])
+            self.assertEqual(target_time.date(), comp_time.date())
+            self.assertEqual(target_time.hour, comp_time.hour)
+            self.assertEqual(target_time.second,comp_time.second)
+            dif = abs(target_time.microsecond - comp_time.microsecond)
+            if key[:3] == "Sec":
+                # Already tested
+                pass
+            elif key[:3] == "Mil":
+                # may be slight rounding differences
+                self.assertLess(dif, 1500, f"failed to match timestamp for {key} {target_time} != {comp_time}")
+            elif key[:3] == "Mic":
+                # may be slight rounding differences
+                self.assertLess(dif, 150, f"failed to match timestamp for {key} {target_time} != {comp_time}")
+            elif key[:3] == "Nan":
+                self.assertEqual(expected[key], get_time_for_method(lines, key))
+            else:
+                raise Exception(f"Unhandled key {key}")
 
     @async_test
     async def test_delete_api(self):