fix(prediction): correct dataset mapping

stratoflights_api/serializers.py

@@ -5,6 +5,7 @@ from django.contrib.auth.password_validation import validate_password
 from django.core.validators import validate_email
 from django.core.exceptions import ValidationError as DjangoValidationError
 from django.contrib.auth import get_user_model
+from .services.tawhiri import LATEST_DATASET_KEYWORD
 from .validators import (
     validate_custom_curve, rate_clip,
     _rfc3339_to_timestamp, base64_to_curve
@@ -21,13 +22,23 @@ PROFILE_STANDARD = "standard_profile"
 PROFILE_FLOAT = "float_profile"
 PROFILE_REVERSE = "reverse_profile"
 PROFILE_CUSTOM = "custom_profile"
-LATEST_DATASET_KEYWORD = "latest"
 SUPPORTED_PROFILES = [PROFILE_STANDARD, PROFILE_FLOAT, PROFILE_REVERSE, PROFILE_CUSTOM]
 
 
 class PredictionRequestSerializer(serializers.Serializer):
     launch_latitude = serializers.FloatField(min_value=-90, max_value=90)
-    launch_longitude = serializers.FloatField(min_value=0, max_value=360)
+    # Deliberately unbounded. Longitude is on a circle, so every real number names
+    # a real meridian and any interval here is a policy about typos, not places —
+    # and that policy belongs to the one service that owns the wind grid. The
+    # endpoint this calls, GET /api/v1/prediction, applies no longitude bound: it
+    # normalises and lets the grid refuse what it cannot use.
+    #
+    # This field was min_value=0, narrower than that endpoint, which refused every
+    # launch west of Greenwich — Canada, Greenland, Alaska. Two layers each
+    # guessing at the range is what produced that, so this one no longer guesses.
+    # FloatField still refuses anything that is not a number; NaN and infinity get
+    # through here and are rejected by the predictor's request decoder.
+    launch_longitude = serializers.FloatField()
     launch_datetime = serializers.DateTimeField()
     launch_altitude = serializers.FloatField(required=False)
     format = serializers.CharField(default="json")

stratoflights_api/services/tawhiri.py

@@ -5,6 +5,12 @@ from typing import Any
 from zoneinfo import ZoneInfo
 from collections import OrderedDict
 
+# Request value meaning "let the predictor use whatever run it has loaded".
+# Lives here because this module is the one that decides what reaches the
+# predictor; the serializer imports it as its default.
+LATEST_DATASET_KEYWORD = "latest"
+
+
 class TawhiriClient:
     BASE_URL = "http://127.0.0.1:8080/api/v1/prediction"
     TIMEOUT = 15
@@ -36,7 +42,20 @@ class TawhiriClient:
         query["burst_altitude"] = params.get("burst_altitude")
         query["descent_rate"] = params.get("descent_rate")
         query["interpolate"] = str(params.get("interpolate", False)).lower()
-        #query["dataset"] = cls._convert_value(params.get("dataset"))
+        # Forwarded only when the operator actually named a run.
+        #
+        # The predictor now honours this parameter and refuses a run it does not
+        # hold, so anything that is not a real epoch must not be sent. Two values
+        # reach here that are not: "" from the UI, and LATEST_DATASET_KEYWORD, the
+        # serializer's default, which means "server chooses" — exactly what
+        # omitting the parameter does. The `filtered` comprehension below drops
+        # None but neither of these.
+        #
+        # A malformed epoch is deliberately still forwarded, so the predictor
+        # rejects it instead of the value being quietly ignored.
+        dataset = params.get("dataset")
+        if dataset and dataset != LATEST_DATASET_KEYWORD:
+            query["dataset"] = cls._convert_value(dataset)
         query["format"] = params.get("format", "json")
         query["pred_type"] = "single"  # <-- в конце
 

stratoflights_api/test_launch_bounds.py

@@ -0,0 +1,74 @@
+from django.test import SimpleTestCase
+
+from .serializers import PredictionRequestSerializer
+
+
+class LaunchLongitudeTests(SimpleTestCase):
+    """
+    This API does not bound longitude. The predictor does.
+
+    Longitude lives on a circle: every real number names a real meridian, and
+    5170 is a legitimate way to write 50 E. So any interval is a policy about
+    typos, not about places, and there is exactly one place that policy belongs —
+    the service that owns the wind grid. Two layers each guessing at it is how the
+    original defect happened: this serializer declared min_value=0, narrower than
+    the endpoint it calls, and refused every launch west of Greenwich. Canada,
+    Greenland and Alaska, i.e. most of the Arctic sites this product targets.
+
+    The endpoint actually called is GET /api/v1/prediction, which applies no
+    longitude bound at all — it normalises and lets the grid refuse what it cannot
+    use. Mirroring that exactly is the point: this layer must never be the narrower
+    one.
+
+    Nuuk is -51.7. The same meridian written unsigned is 308.3, and that always
+    worked, which is what showed the constraint was about notation, not place.
+
+    Non-numbers are still refused here, by FloatField. NaN and infinity are not:
+    FloatField parses them, and the predictor's request decoder rejects them with a
+    400 (measured). Deliberately not re-checked here, so this layer keeps a single
+    responsibility.
+    """
+
+    def payload(self, lng):
+        return {
+            "launch_latitude": 64.1,
+            "launch_longitude": lng,
+            "launch_datetime": "2026-08-05T12:00:00Z",
+            "launch_altitude": 0,
+            "ascent_rate": 5,
+            "burst_altitude": 30000,
+            "descent_rate": 5,
+            "profile": "standard_profile",
+        }
+
+    def assert_accepted(self, lng):
+        s = PredictionRequestSerializer(data=self.payload(lng))
+        self.assertTrue(s.is_valid(), f"lng={lng} rejected: {s.errors}")
+
+    def test_accepts_a_western_launch(self):
+        self.assert_accepted(-51.7)
+
+    def test_accepts_the_same_meridian_written_unsigned(self):
+        self.assert_accepted(308.3)
+
+    def test_accepts_every_notation_the_predictor_accepts(self):
+        # Measured against GET /api/v1/prediction: each of these returns 200, and
+        # the pairs below name the same meridian, so each returns the same
+        # trajectory as its twin. -180/180 are one meridian; 0/360 are one
+        # meridian; -90/270 are one meridian.
+        for lng in (-180, 180, 0, 360, -90, 270, -200, -180.0001, 359.999):
+            with self.subTest(lng=lng):
+                self.assert_accepted(lng)
+
+    def test_does_not_bound_the_range(self):
+        # 1e30 is nonsense, and it is the predictor that says so — it answers 400
+        # "lng=1e+30 out of range". Asserting acceptance here is the explicit
+        # statement that range is not this layer's job; a bound added here would
+        # again risk being narrower than the service behind it.
+        self.assert_accepted(1e30)
+
+    def test_still_refuses_things_that_are_not_numbers(self):
+        for lng in ("abc", None, "", []):
+            with self.subTest(lng=lng):
+                s = PredictionRequestSerializer(data=self.payload(lng))
+                self.assertFalse(s.is_valid(), f"lng={lng!r} accepted but is not a number")