Handle showing partial results in the grid simulation

backend/tests/test_grid_simulations_endpoint.py

@@ -2,6 +2,7 @@
 from fastapi.testclient import TestClient as _BaseTestClient
 from starlette.status import HTTP_422_UNPROCESSABLE_ENTITY
 
+import acidwatch_api.database as db
 from acidwatch_api.app import fastapi_app
 from acidwatch_api.authentication import authenticated_user_claims
 from acidwatch_api.models import base
@@ -31,6 +32,11 @@ def client(monkeypatch):
         yield c
 
 
+@pytest.fixture
+def sql_session(client):
+    return client.app_state["session"]
+
+
 class HalvingAdapter(base.BaseAdapter):
     model_id = "halving"
     display_name = "Halving Model"
@@ -182,6 +188,77 @@ def test_grid_surfaces_per_point_errors_without_failing_whole_request(client):
         assert sim["error"] is not None
 
 
+def test_grid_returns_finished_points_while_others_are_pending(client, sql_session):
+    simulation_ids = []
+    with sql_session() as session:
+        for index, concentration in enumerate((10, 20, 30, 40)):
+            model_input = db.ModelInput(
+                previous_model_input_id=None,
+                model_id="halving",
+                parameters={},
+            )
+            simulation = db.Simulation(
+                owner_id=None,
+                phases=[
+                    {
+                        "kind": "co2-rich",
+                        "fraction": 1.0,
+                        "concentrations": {"H2O": concentration},
+                    }
+                ],
+                conditions={},
+                model_inputs=[model_input],
+            )
+            session.add(simulation)
+            session.flush()
+            simulation_ids.append(str(simulation.id))
+
+            if index < 2:
+                session.add(
+                    db.ModelResult(
+                        model_input=model_input,
+                        phases=[
+                            {
+                                "kind": "co2-rich",
+                                "fraction": 1.0,
+                                "concentrations": {"H2O": concentration / 2},
+                            }
+                        ],
+                        panels=[],
+                        error=None,
+                    )
+                )
+
+        grid = db.GridSimulation(
+            owner_id=None,
+            axes=[
+                {
+                    "substance": "H2O",
+                    "range": {"min": 10, "max": 40, "step": 10},
+                }
+            ],
+            simulation_ids=simulation_ids,
+        )
+        session.add(grid)
+        session.commit()
+        grid_id = grid.id
+
+    result = client.get_json(f"/grid-simulations/{grid_id}/result")
+
+    assert result["status"] == "pending"
+    assert [sim["status"] for sim in result["simulations"]] == [
+        "done",
+        "done",
+        "pending",
+        "pending",
+    ]
+
+    finished, still_running = result["simulations"][0], result["simulations"][2]
+    assert finished["results"][0]["phases"][0]["concentrations"] == {"H2O": 5}
+    assert still_running["results"] == []
+    assert still_running["input"]["concentrations"] == {"H2O": 30}
+
+
 @pytest.mark.usefixtures("dummy_adapters")
 def test_grid_rejects_unknown_model(client):
     response = _create_grid(

frontend/src/api/api.ts

@@ -129,13 +129,7 @@ export const startGridSimulation = async (grid: CreateGridSimulation): Promise<s
 };
 
 export const getGridSimulationResult = async (gridId: string): Promise<GridSimulationResult> => {
-    const data = await apiRequest("GET", `/grid-simulations/${gridId}/result`, { responseModel: GridSimulationResult });
-
-    if (data.status === "pending") {
-        throw new ResultIsPending();
-    }
-
-    return data;
+    return await apiRequest("GET", `/grid-simulations/${gridId}/result`, { responseModel: GridSimulationResult });
 };
 
 export const getModels = async (): Promise<ModelConfig[]> => {

frontend/src/components/GridSimulation/CompareGridSimulations.tsx

@@ -1,7 +1,7 @@
 import React, { useMemo, useState } from "react";
-import { useQueries } from "@tanstack/react-query";
+import { useQueries, type Query } from "@tanstack/react-query";
 import { CircularProgress, NativeSelect, Typography } from "@equinor/eds-core-react";
-import { getGridSimulationResult, ResultIsPending } from "@/api/api";
+import { getGridSimulationResult } from "@/api/api";
 import { MainContainer } from "@/components/styles";
 import { GridSimulationResult } from "@/dto/GridSimulation";
 import LineChart, { LineSeries } from "@/components/LineChart";
@@ -110,8 +110,8 @@ const CompareGridSimulations: React.FC<CompareGridSimulationsProps> = ({ gridIds
         queries: gridIds.map((id) => ({
             queryKey: ["grid-simulation", id],
             queryFn: () => getGridSimulationResult(id),
-            retry: (_count: number, error: Error) => error instanceof ResultIsPending,
-            retryDelay: () => 2000,
+            refetchInterval: (query: Query<GridSimulationResult>) =>
+                query.state.data?.status === "pending" ? 2000 : false,
         })),
     });
 

frontend/src/components/GridSimulation/GridResultStep.tsx

@@ -26,6 +26,9 @@ const GridResultStep: React.FC<GridResultStepProps> = ({ result, isLoading, erro
     if (result === undefined) {
         return <NoResults />;
     }
+    if (result.simulations.every((sim) => sim.status === "pending")) {
+        return <Working />;
+    }
     return <GridResults result={result} />;
 };
 

frontend/src/components/GridSimulation/GridResults.tsx

@@ -33,9 +33,8 @@ const GridPhaseChart: React.FC<GridPhaseChartProps> = ({ result, modelIndex, pha
         () => collectOutputSubstances(simulations, modelIndex, phaseKind),
         [simulations, modelIndex, phaseKind]
     );
-    const [selectedSubstances, setSelectedSubstances] = useState<string[]>(() =>
-        defaultSelectedSubstances(simulations, modelIndex, phaseKind)
-    );
+    const [selection, setSelection] = useState<string[] | null>(null);
+    const selectedSubstances = selection ?? defaultSelectedSubstances(simulations, modelIndex, phaseKind);
 
     const xAxisSubstance = axes[0]?.substance ?? "Unknown";
     const xValues = simulations.map((sim) => parseFloat(sim.input.concentrations[xAxisSubstance].toFixed(2)) ?? 0);
@@ -51,7 +50,7 @@ const GridPhaseChart: React.FC<GridPhaseChartProps> = ({ result, modelIndex, pha
                 options={allSubstances}
                 selectedOptions={selectedSubstances}
                 multiple
-                onOptionsChange={({ selectedItems }) => setSelectedSubstances(selectedItems)}
+                onOptionsChange={({ selectedItems }) => setSelection(selectedItems)}
                 optionLabel={optionName}
                 style={{ maxWidth: "400px", marginBottom: "1rem" }}
             />
@@ -146,6 +145,7 @@ const GridResults: React.FC<GridResultsProps> = ({ result }) => {
     const sections = buildModelSections(inputModels, models);
 
     const erroredSimulations = simulations.filter((sim) => sim.status === "error");
+    const pendingSimulations = simulations.filter((sim) => sim.status === "pending");
 
     const xAxisSubstance = axes[0]?.substance ?? "Unknown";
     const modelLabel = inputModels.map((model) => model.modelId).join(" → ") || "Unknown model";
@@ -165,6 +165,17 @@ const GridResults: React.FC<GridResultsProps> = ({ result }) => {
                 <strong>{modelLabel}</strong>.
             </Typography>
 
+            {pendingSimulations.length > 0 && (
+                <Banner style={{ marginBottom: "1rem" }}>
+                    <Banner.Icon variant="info">⏳</Banner.Icon>
+                    <Banner.Message>
+                        Showing partial results. {simulations.length - pendingSimulations.length} of{" "}
+                        {simulations.length} runs have finished; the remaining {pendingSimulations.length} appear as
+                        they complete.
+                    </Banner.Message>
+                </Banner>
+            )}
+
             {erroredSimulations.length > 0 && (
                 <Banner style={{ marginBottom: "1rem" }}>
                     <Banner.Icon variant="warning">⚠️</Banner.Icon>

frontend/src/pages/Models.tsx

@@ -88,8 +88,7 @@ const Models: React.FC = () => {
         queryKey: ["grid-simulation", gridId],
         queryFn: () => getGridSimulationResult(gridId!),
         enabled: gridId !== undefined,
-        retry: (_count, error) => error instanceof ResultIsPending,
-        retryDelay: () => 2000,
+        refetchInterval: (query) => (query.state.data?.status === "pending" ? 2000 : false),
     });
 
     useEffect(() => {
@@ -106,10 +105,10 @@ const Models: React.FC = () => {
     }, [simulationId, simulationIsLoading]);
 
     useEffect(() => {
-        if (gridId && !gridIsLoading) {
+        if (gridId && (gridResult?.status === "done" || gridResultError)) {
             simulationHistory.finalizeEntry(gridId);
         }
-    }, [gridId, gridIsLoading]);
+    }, [gridId, gridResult?.status, gridResultError]);
 
     useEffect(() => {
         if (simulationResults && simulationResults.status !== "error" && models.length > 0) {
@@ -133,14 +132,14 @@ const Models: React.FC = () => {
         }
     }, [simulationResults, models]);
 
-    useEffect(() => {
-        if (gridResult && models.length > 0) {
-            const firstSim = gridResult.simulations[0];
-            if (!firstSim) return;
+    const gridInput = gridResult?.simulations[0]?.input;
+    const gridAxes = gridResult?.axes;
 
+    useEffect(() => {
+        if (gridInput && gridAxes && models.length > 0) {
             const loadedModels: ModelConfig[] = [];
 
-            firstSim.input.models.forEach((modelInput) => {
+            gridInput.models.forEach((modelInput) => {
                 const model = models.find((m) => m.modelId === modelInput.modelId);
                 if (model) {
                     loadedModels.push(model);
@@ -152,16 +151,16 @@ const Models: React.FC = () => {
                 }
             });
 
-            useConcentrationsStore.getState().reset(firstSim.input.concentrations);
-            useConditionsStore.getState().reset(firstSim.input.conditions);
+            useConcentrationsStore.getState().reset(gridInput.concentrations);
+            useConditionsStore.getState().reset(gridInput.conditions);
 
             useGridRangeStore.getState().reset({
-                axes: gridResult.axes,
+                axes: gridAxes,
             });
 
             setSelectedModels(loadedModels);
         }
-    }, [gridResult, models]);
+    }, [gridInput, gridAxes, models, gridId]);
 
     const isGridMode = gridId !== undefined;
 

frontend/tests/setup.ts

@@ -15,6 +15,13 @@ Object.defineProperty(window, "matchMedia", {
     })),
 });
 
+// jsdom does not implement the Popover API used by EDS overlays
+for (const method of ["showPopover", "hidePopover", "togglePopover"] as const) {
+    if (!(method in HTMLElement.prototype)) {
+        HTMLElement.prototype[method] = vi.fn();
+    }
+}
+
 // Ensure that the DOM is clean between every test
 afterEach(() => {
     cleanup();