fix: loading remote data should not make the map dirty

umap/static/umap/js/modules/data/layer.js

@@ -294,16 +294,6 @@ export class DataLayer {
     }
   }
 
-  clear() {
-    // TODO do not startBatch for remoteData layer
-    this.sync.startBatch()
-    for (const feature of Object.values(this._features)) {
-      feature.del()
-    }
-    this.sync.commitBatch()
-    this.dataChanged()
-  }
-
   backupData() {
     if (this._geojson) {
       this._geojson_bk = Utils.CopyJSON(this._geojson)
@@ -354,7 +344,7 @@ export class DataLayer {
       url = this._umap.proxyUrl(url, this.options.remoteData.ttl)
     }
     return await this.getUrl(url, remoteUrl).then((raw) => {
-      this.clear()
+      this.clear(false)
       return this._umap.formatter
         .parse(raw, this.options.remoteData.format)
         .then((geojson) => this.fromGeoJSON(geojson, false))
@@ -655,7 +645,16 @@ export class DataLayer {
 
   empty() {
     if (this.isRemoteLayer()) return
+    this.sync.startBatch()
     this.clear()
+    this.sync.commitBatch()
+  }
+
+  clear(sync = true) {
+    for (const feature of Object.values(this._features)) {
+      feature.del(sync)
+    }
+    this.dataChanged()
   }
 
   clone() {
@@ -1177,7 +1176,7 @@ export class DataLayer {
       // Response contains geojson only if save has conflicted and conflicts have
       // been resolved. So we need to reload to get extra data (added by someone else)
       if (data.geojson) {
-        this.clear()
+        this.clear(false)
         this.fromGeoJSON(data.geojson)
         delete data.geojson
       }

umap/tests/integration/test_datalayer.py

@@ -1,5 +1,4 @@
 import json
-import os
 import re
 
 import pytest

umap/tests/integration/test_remote_data.py

@@ -0,0 +1,79 @@
+from playwright.sync_api import expect
+
+from umap.models import Map
+
+from ..base import DataLayerFactory
+
+
+def test_dynamic_remote_data(page, live_server, tilelayer, map):
+    data = [
+        {
+            "type": "FeatureCollection",
+            "features": [
+                {
+                    "type": "Feature",
+                    "properties": {"name": "Point 2"},
+                    "geometry": {
+                        "type": "Point",
+                        "coordinates": [4.3375, 11.2707],
+                    },
+                }
+            ],
+        },
+        {
+            "type": "FeatureCollection",
+            "features": [
+                {
+                    "type": "Feature",
+                    "properties": {"name": "Point 1"},
+                    "geometry": {
+                        "type": "Point",
+                        "coordinates": [4.3375, 12.2707],
+                    },
+                }
+            ],
+        },
+    ]
+
+    def handle(route):
+        route.fulfill(json=data.pop())
+
+    settings = {
+        "remoteData": {
+            "url": "https://remote.org/data.json",
+            "format": "geojson",
+            "dynamic": True,
+        },
+        "showLabel": True,
+    }
+    DataLayerFactory(map=map, settings=settings)
+    map.edit_status = Map.ANONYMOUS
+    map.settings["properties"]["zoom"] = 6
+    map.settings["geometry"] = {
+        "type": "Point",
+        "coordinates": [5, 12],
+    }
+    map.save()
+
+    # Intercept the route to the proxy
+    page.route("https://remote.org/data.json", handle)
+    page.goto(f"{live_server.url}{map.get_absolute_url()}")
+
+    expect(page.get_by_role("tooltip", name="Point 1")).to_be_visible()
+
+    # Now drag the map
+    map_el = page.locator("#map")
+    map_el.drag_to(
+        map_el,
+        source_position={"x": 100, "y": 100},
+        target_position={"x": 110, "y": 110},
+    )
+
+    expect(page.get_by_role("tooltip", name="Point 2")).to_be_visible()
+    # Needed otherwise it found two (!) tooltip with name "Point 1"…
+    page.wait_for_timeout(300)
+    expect(page.get_by_role("tooltip", name="Point 1")).to_be_hidden()
+
+    # Map must not be dirty
+    page.get_by_role("button", name="Edit").click()
+    expect(page.locator(".edit-undo")).to_be_disabled()