query geopoints from firebase

Error Place

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May 14, 2020, 11:22:23 AM5/14/20

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hi guys . i have now succesfully managed to write geopoints inside my users collection ;) . i need to retrive them inside another map screen and show them as markers . i have tried many solutions but it crashes in the end . can anyone help me?

thanks guys

Screenshot 2020-05-14 at 17.18.12.png

Suzuki Tomohiro

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May 14, 2020, 11:45:52 AM5/14/20

to Error Place, Flutter Development (flutter-dev)

Do you want to share minimum reproducible project of the problem and the error message?

I guess the minimum reproducible project does not need fetch points from Firebase, it your problem is purely caused by dropping a pin on a map (Google Map, OpenSteet map or something else?)

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Error Place

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May 14, 2020, 1:24:32 PM5/14/20

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initMarker(request, requestId) {
  var markerIdVal = requestId;
  final MarkerId markerId = MarkerId(markerIdVal);
  final Marker marker = Marker(
      markerId: markerId,
      position:
          LatLng(request['geopoint'].latitde, request['geopoint'].longitude),
      infoWindow: InfoWindow(
        title: 'name',
      ));
  setState(() {
    _markers[markerId] = marker;
    print(markerId);
  });
}
_populateMarks(){
  Firestore.instance.collection('users').getDocuments().then((docs){
    if(docs.documents.isNotEmpty){
      for(int i = 0; i < docs.documents.length; ++i){
        initMarker(docs.documents[i].data, docs.documents[i].documentID);
      }
    }
  });
}

GoogleMap(
  markers: Set<Marker>.of(_markers.values),
  myLocationEnabled: true,
  onMapCreated: onMapCreated,
  mapType: MapType.terrain,
  myLocationButtonEnabled: true,
  initialCameraPosition:
      CameraPosition(target: _initialPosition, zoom: 13),
),

this is the code. no markers shown on map and when i try to print _marker flutter return {}

Suzuki Tomohiro

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May 14, 2020, 1:58:47 PM5/14/20

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If you want to place a marker on, say, New York, are you able to do that? (Without anything with Firestore.

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Suzuki Tomohiro

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May 14, 2020, 2:20:24 PM5/14/20

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Good. Ensure you reference “position” field of a user in initMarker

On Thu, May 14, 2020 at 2:08 PM Error Place <reza7....@gmail.com> wrote:

Yes I am
Thank you for response btw

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Error Place

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May 14, 2020, 2:24:19 PM5/14/20

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LatLng(request['position'].latitde, request['position'].longitude),

i tried but stil an empty map. is this what you thinking?

sorry again i am new

Den torsdag 14 maj 2020 kl. 17:22:23 UTC+2 skrev Error Place:

Error Place

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May 14, 2020, 2:26:21 PM5/14/20

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i have the code here on stackoverflow

https://stackoverflow.com/questions/61803830/how-to-query-geopoints-from-firestore-and-set-markers-flutter

Den torsdag 14 maj 2020 kl. 17:22:23 UTC+2 skrev Error Place:

Suzuki Tomohiro

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May 14, 2020, 2:39:33 PM5/14/20

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No, “position” has “geopoint” attribute.

I think you want to learn how to use debugger and break points. You’ll be much more productive.

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Suzuki Tomohiro

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May 14, 2020, 2:56:18 PM5/14/20

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Would you show me what the debugger tell if you set a breakpoint at the beginning of initMarker?

On Thu, May 14, 2020 at 2:41 PM Error Place <reza7....@gmail.com> wrote:

Thank you Suzuki. That is what I am trying to do while creating . Can you please tell me how to make this one work🙏

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Error Place

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May 14, 2020, 3:03:45 PM5/14/20

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Screenshot 2020-05-14 at 21.03.04.png

Den torsdag 14 maj 2020 kl. 17:22:23 UTC+2 skrev Error Place:

Error Place

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May 14, 2020, 3:04:14 PM5/14/20

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Performing hot restart...

Syncing files to device AOSP on IA Emulator...

Restarted application in 2,850ms.

I/flutter (19791): ══╡ EXCEPTION CAUGHT BY IMAGE RESOURCE SERVICE ╞════════════════════════════════════════════════════

I/flutter (19791): The following ArgumentError was thrown resolving an image codec:

I/flutter (19791): Invalid argument(s): No host specified in URI file:///

I/flutter (19791):

I/flutter (19791): When the exception was thrown, this was the stack:

I/flutter (19791): #0 _HttpClient._openUrl (dart:_http/http_impl.dart:2282:9)

I/flutter (19791): #1 _HttpClient.getUrl (dart:_http/http_impl.dart:2205:48)

I/flutter (19791): #2 NetworkImage._loadAsync (package:flutter/src/painting/_network_image_io.dart:85:59)

I/flutter (19791): #3 NetworkImage.load (package:flutter/src/painting/_network_image_io.dart:48:14)

I/flutter (19791): #4 ImageProvider.resolveStreamForKey.<anonymous closure> (package:flutter/src/painting/image_provider.dart:501:13)

I/flutter (19791): #5 ImageCache.putIfAbsent (package:flutter/src/painting/image_cache.dart:359:22)

I/flutter (19791): #6 ImageProvider.resolveStreamForKey (package:flutter/src/painting/image_provider.dart:499:80)

I/flutter (19791): #7 ImageProvider.resolve.<anonymous closure> (package:flutter/src/painting/image_provider.dart:330:9)

I/flutter (19791): #8 ImageProvider._createErrorHandlerAndKey.<anonymous closure>.<anonymous closure> (package:flutter/src/painting/image_provider.dart:460:26)

I/flutter (19791): #9 SynchronousFuture.then (package:flutter/src/foundation/synchronous_future.dart:41:29)

I/flutter (19791): #10 ImageProvider._createErrorHandlerAndKey.<anonymous closure> (package:flutter/src/painting/image_provider.dart:457:11)

I/flutter (19791): #14 ImageProvider._createErrorHandlerAndKey (package:flutter/src/painting/image_provider.dart:449:16)

I/flutter (19791): #15 ImageProvider.resolve (package:flutter/src/painting/image_provider.dart:327:5)

I/flutter (19791): #16 DecorationImagePainter.paint (package:flutter/src/painting/decoration_image.dart:244:55)

I/flutter (19791): #17 _BoxDecorationPainter._paintBackgroundImage (package:flutter/src/painting/box_decoration.dart:463:19)

I/flutter (19791): #18 _BoxDecorationPainter.paint (package:flutter/src/painting/box_decoration.dart:481:5)

I/flutter (19791): #19 RenderDecoratedBox.paint (package:flutter/src/rendering/proxy_box.dart:2021:16)

I/flutter (19791): #20 RenderObject._paintWithContext (package:flutter/src/rendering/object.dart:2264:7)

I/flutter (19791): #21 PaintingContext.paintChild (package:flutter/src/rendering/object.dart:184:13)

I/flutter (19791): #22 RenderBoxContainerDefaultsMixin.defaultPaint (package:flutter/src/rendering/box.dart:2515:15)

I/flutter (19791): #23 RenderStack.paintStack (package:flutter/src/rendering/stack.dart:602:5)

I/flutter (19791): #24 RenderStack.paint (package:flutter/src/rendering/stack.dart:610:7)

I/flutter (19791): #25 RenderObject._paintWithContext (package:flutter/src/rendering/object.dart:2264:7)

I/flutter (19791): #26 PaintingContext.paintChild (package:flutter/src/rendering/object.dart:184:13)

I/flutter (19791): #27 RenderProxyBoxMixin.paint (package:flutter/src/rendering/proxy_box.dart:129:15)

I/flutter (19791): #28 RenderObject._paintWithContext (package:flutter/src/rendering/object.dart:2264:7)

I/flutter (19791): #29 PaintingContext.paintChild (package:flutter/src/rendering/object.dart:184:13)

I/flutter (19791): #30 RenderProxyBoxMixin.paint (package:flutter/src/rendering/proxy_box.dart:129:15)

I/flutter (19791): #31 _RenderInkFeatures.paint (package:flutter/src/material/material.dart:531:11)

I/flutter (19791): #32 RenderObject._paintWithContext (package:flutter/src/rendering/object.dart:2264:7)

I/flutter (19791): #33 PaintingContext.paintChild (package:flutter/src/rendering/object.dart:184:13)

I/flutter (19791): #34 RenderProxyBoxMixin.paint (package:flutter/src/rendering/proxy_box.dart:129:15)

I/flutter (19791): #35 RenderCustomPaint.paint (package:flutter/src/rendering/custom_paint.dart:575:11)

I/flutter (19791): #36 RenderObject._paintWithContext (package:flutter/src/rendering/object.dart:2264:7)

I/flutter (19791): #37 PaintingContext.paintChild (package:flutter/src/rendering/object.dart:184:13)

I/flutter (19791): #38 RenderProxyBoxMixin.paint (package:flutter/src/rendering/proxy_box.dart:129:15)

I/flutter (19791): #39 PaintingContext.pushLayer (package:flutter/src/rendering/object.dart:391:12)

I/flutter (19791): #40 RenderPhysicalShape.paint (package:flutter/src/rendering/proxy_box.dart:1899:15)

I/flutter (19791): #41 RenderObject._paintWithContext (package:flutter/src/rendering/object.dart:2264:7)

I/flutter (19791): #42 PaintingContext.paintChild (package:flutter/src/rendering/object.dart:184:13)

I/flutter (19791): #43 RenderShiftedBox.paint (package:flutter/src/rendering/shifted_box.dart:70:15)

I/flutter (19791): #44 RenderObject._paintWithContext (package:flutter/src/rendering/object.dart:2264:7)

I/flutter (19791): #45 PaintingContext.paintChild (package:flutter/src/rendering/object.dart:184:13)

I/flutter (19791): #46 RenderProxyBoxMixin.paint (package:flutter/src/rendering/proxy_box.dart:129:15)

I/flutter (19791): #47 RenderObject._paintWithContext (package:flutter/src/rendering/object.dart:2264:7)

I/flutter (19791): #48 PaintingContext.paintChild (package:flutter/src/rendering/object.dart:184:13)

I/flutter (19791): #49 RenderProxyBoxMixin.paint (package:flutter/src/rendering/proxy_box.dart:129:15)

I/flutter (19791): #50 PaintingContext.pushLayer (package:flutter/src/rendering/object.dart:391:12)

I/flutter (19791): #51 PaintingContext.pushClipRRect (package:flutter/src/rendering/object.dart:483:7)

I/flutter (19791): #52 RenderClipRRect.paint (package:flutter/src/rendering/proxy_box.dart:1417:23)

I/flutter (19791): #53 RenderObject._paintWithContext (package:flutter/src/rendering/object.dart:2264:7)

I/flutter (19791): #54 PaintingContext.paintChild (package:flutter/src/rendering/object.dart:184:13)

I/flutter (19791): #55 RenderShiftedBox.paint (package:flutter/src/rendering/shifted_box.dart:70:15)

I/flutter (19791): #56 RenderObject._paintWithContext (package:flutter/src/rendering/object.dart:2264:7)

I/flutter (19791): #57 PaintingContext.paintChild (package:flutter/src/rendering/object.dart:184:13)

I/flutter (19791): #58 RenderProxyBoxMixin.paint (package:flutter/src/rendering/proxy_box.dart:129:15)

I/flutter (19791): #59 RenderObject._paintWithContext (package:flutter/src/rendering/object.dart:2264:7)

I/flutter (19791): #60 PaintingContext.paintChild (package:flutter/src/rendering/object.dart:184:13)

I/flutter (19791): #61 RenderBoxContainerDefaultsMixin.defaultPaint (package:flutter/src/rendering/box.dart:2515:15)

I/flutter (19791): #62 RenderStack.paintStack (package:flutter/src/rendering/stack.dart:602:5)

I/flutter (19791): #63 RenderStack.paint (package:flutter/src/rendering/stack.dart:610:7)

I/flutter (19791): #64 RenderObject._paintWithContext (package:flutter/src/rendering/object.dart:2264:7)

I/flutter (19791): #65 PaintingContext.paintChild (package:flutter/src/rendering/object.dart:184:13)

I/flutter (19791): #66 RenderProxyBoxMixin.paint (package:flutter/src/rendering/proxy_box.dart:129:15)

I/flutter (19791): #67 RenderObject._paintWithContext (package:flutter/src/rendering/object.dart:2264:7)

I/flutter (19791): #68 PaintingContext.paintChild (package:flutter/src/rendering/object.dart:184:13)

I/flutter (19791): #69 RenderProxyBoxMixin.paint (package:flutter/src/rendering/proxy_box.dart:129:15)

I/flutter (19791): #70 RenderObject._paintWithContext (package:flutter/src/rendering/object.dart:2264:7)

I/flutter (19791): #71 PaintingContext.paintChild (package:flutter/src/rendering/object.dart:184:13)

I/flutter (19791): #72 RenderProxyBoxMixin.paint (package:flutter/src/rendering/proxy_box.dart:129:15)

I/flutter (19791): #73 RenderDecoratedBox.paint (package:flutter/src/rendering/proxy_box.dart:2040:11)

I/flutter (19791): #74 RenderObject._paintWithContext (package:flutter/src/rendering/object.dart:2264:7)

I/flutter (19791): #75 PaintingContext.paintChild (package:flutter/src/rendering/object.dart:184:13)

I/flutter (19791): #76 RenderProxyBoxMixin.paint (package:flutter/src/rendering/proxy_box.dart:129:15)

I/flutter (19791): #77 RenderObject._paintWithContext (package:flutter/src/rendering/object.dart:2264:7)

I/flutter (19791): #78 PaintingContext.paintChild (package:flutter/src/rendering/object.dart:184:13)

I/flutter (19791): #79 RenderShiftedBox.paint (package:flutter/src/rendering/shifted_box.dart:70:15)

I/flutter (19791): #80 RenderObject._paintWithContext (package:flutter/src/rendering/object.dart:2264:7)

I/flutter (19791): #81 PaintingContext.paintChild (package:flutter/src/rendering/object.dart:184:13)

I/flutter (19791): #82 RenderProxyBoxMixin.paint (package:flutter/src/rendering/proxy_box.dart:129:15)

I/flutter (19791): #83 RenderObject._paintWithContext (package:flutter/src/rendering/object.dart:2264:7)

I/flutter (19791): #84 PaintingContext._repaintCompositedChild (package:flutter/src/rendering/object.dart:135:11)

I/flutter (19791): #85 PaintingContext.repaintCompositedChild (package:flutter/src/rendering/object.dart:95:5)

I/flutter (19791): #86 PaintingContext._compositeChild (package:flutter/src/rendering/object.dart:201:7)

I/flutter (19791): #87 PaintingContext.paintChild (package:flutter/src/rendering/object.dart:182:7)

I/flutter (19791): #88 RenderProxyBoxMixin.paint (package:flutter/src/rendering/proxy_box.dart:129:15)

I/flutter (19791): #89 RenderObject._paintWithContext (package:flutter/src/rendering/object.dart:2264:7)

I/flutter (19791): #90 PaintingContext.paintChild (package:flutter/src/rendering/object.dart:184:13)

I/flutter (19791): #91 RenderSliverMultiBoxAdaptor.paint (package:flutter/src/rendering/sliver_multi_box_adaptor.dart:639:17)

I/flutter (19791): #92 RenderObject._paintWithContext (package:flutter/src/rendering/object.dart:2264:7)

I/flutter (19791): #93 PaintingContext.paintChild (package:flutter/src/rendering/object.dart:184:13)

I/flutter (19791): #94 RenderSliverEdgeInsetsPadding.paint (package:flutter/src/rendering/sliver_padding.dart:277:15)

I/flutter (19791): #95 RenderObject._paintWithContext (package:flutter/src/rendering/object.dart:2264:7)

I/flutter (19791): #96 PaintingContext.paintChild (package:flutter/src/rendering/object.dart:184:13)

I/flutter (19791): #97 RenderViewportBase._paintContents (package:flutter/src/rendering/viewport.dart:587:17)

I/flutter (19791): #98 PaintingContext.pushLayer (package:flutter/src/rendering/object.dart:391:12)

I/flutter (19791): #99 PaintingContext.pushClipRect (package:flutter/src/rendering/object.dart:447:7)

I/flutter (19791): #100 RenderViewportBase.paint (package:flutter/src/rendering/viewport.dart:578:15)

I/flutter (19791): #101 RenderObject._paintWithContext (package:flutter/src/rendering/object.dart:2264:7)

I/flutter (19791): #102 PaintingContext._repaintCompositedChild (package:flutter/src/rendering/object.dart:135:11)

I/flutter (19791): #103 PaintingContext.repaintCompositedChild (package:flutter/src/rendering/object.dart:95:5)

I/flutter (19791): #104 PaintingContext._compositeChild (package:flutter/src/rendering/object.dart:201:7)

I/flutter (19791): #105 PaintingContext.paintChild (package:flutter/src/rendering/object.dart:182:7)

I/flutter (19791): #106 RenderProxyBoxMixin.paint (package:flutter/src/rendering/proxy_box.dart:129:15)

I/flutter (19791): #107 RenderObject._paintWithContext (package:flutter/src/rendering/object.dart:2264:7)

I/flutter (19791): #108 PaintingContext.paintChild (package:flutter/src/rendering/object.dart:184:13)

I/flutter (19791): #109 RenderProxyBoxMixin.paint (package:flutter/src/rendering/proxy_box.dart:129:15)

I/flutter (19791): #110 RenderObject._paintWithContext (package:flutter/src/rendering/object.dart:2264:7)

I/flutter (19791): #111 PaintingContext.paintChild (package:flutter/src/rendering/object.dart:184:13)

I/flutter (19791): #112 RenderProxyBoxMixin.paint (package:flutter/src/rendering/proxy_box.dart:129:15)

I/flutter (19791): #113 RenderObject._paintWithContext (package:flutter/src/rendering/object.dart:2264:7)

I/flutter (19791): #114 PaintingContext.paintChild (package:flutter/src/rendering/object.dart:184:13)

I/flutter (19791): #115 RenderProxyBoxMixin.paint (package:flutter/src/rendering/proxy_box.dart:129:15)

I/flutter (19791): #116 RenderObject._paintWithContext (package:flutter/src/rendering/object.dart:2264:7)

I/flutter (19791): #117 PaintingContext.paintChild (package:flutter/src/rendering/object.dart:184:13)

I/flutter (19791): #118 RenderProxyBoxMixin.paint (package:flutter/src/rendering/proxy_box.dart:129:15)

I/flutter (19791): #119 RenderObject._paintWithContext (package:flutter/src/rendering/object.dart:2264:7)

I/flutter (19791): #120 PaintingContext.paintChild (package:flutter/src/rendering/object.dart:184:13)

I/flutter (19791): #121 RenderProxyBoxMixin.paint (package:flutter/src/rendering/proxy_box.dart:129:15)

I/flutter (19791): #122 RenderObject._paintWithContext (package:flutter/src/rendering/object.dart:2264:7)

I/flutter (19791): #123 PaintingContext.paintChild (package:flutter/src/rendering/object.dart:184:13)

I/flutter (19791): #124 RenderProxyBoxMixin.paint (package:flutter/src/rendering/proxy_box.dart:129:15)

I/flutter (19791): #125 RenderObject._paintWithContext (package:flutter/src/rendering/object.dart:2264:7)

I/flutter (19791): #126 PaintingContext._repaintCompositedChild (package:flutter/src/rendering/object.dart:135:11)

I/flutter (19791): #127 PaintingContext.repaintCompositedChild (package:flutter/src/rendering/object.dart:95:5)

I/flutter (19791): #128 PaintingContext._compositeChild (package:flutter/src/rendering/object.dart:201:7)

I/flutter (19791): #129 PaintingContext.paintChild (package:flutter/src/rendering/object.dart:182:7)

I/flutter (19791): #130 RenderProxyBoxMixin.paint (package:flutter/src/rendering/proxy_box.dart:129:15)

I/flutter (19791): #131 RenderCustomPaint.paint (package:flutter/src/rendering/custom_paint.dart:575:11)

I/flutter (19791): #132 RenderObject._paintWithContext (package:flutter/src/rendering/object.dart:2264:7)

I/flutter (19791): #133 PaintingContext.paintChild (package:flutter/src/rendering/object.dart:184:13)

I/flutter (19791): #134 RenderProxyBoxMixin.paint (package:flutter/src/rendering/proxy_box.dart:129:15)

I/flutter (19791): #135 RenderObject._paintWithContext (package:flutter/src/rendering/object.dart:2264:7)

I/flutter (19791): #136 PaintingContext._repaintCompositedChild (package:flutter/src/rendering/object.dart:135:11)

I/flutter (19791): #137 PaintingContext.repaintCompositedChild (package:flutter/src/rendering/object.dart:95:5)

I/flutter (19791): #138 PaintingContext._compositeChild (package:flutter/src/rendering/object.dart:201:7)

I/flutter (19791): #139 PaintingContext.paintChild (package:flutter/src/rendering/object.dart:182:7)

I/flutter (19791): #140 RenderProxyBoxMixin.paint (package:flutter/src/rendering/proxy_box.dart:129:15)

I/flutter (19791): #141 RenderObject._paintWithContext (package:flutter/src/rendering/object.dart:2264:7)

I/flutter (19791): #142 PaintingContext.paintChild (package:flutter/src/rendering/object.dart:184:13)

I/flutter (19791): #143 RenderShiftedBox.paint (package:flutter/src/rendering/shifted_box.dart:70:15)

I/flutter (19791): #144 RenderObject._paintWithContext (package:flutter/src/rendering/object.dart:2264:7)

I/flutter (19791): #145 PaintingContext.paintChild (package:flutter/src/rendering/object.dart:184:13)

I/flutter (19791): #146 RenderBoxContainerDefaultsMixin.defaultPaint (package:flutter/src/rendering/box.dart:2515:15)

I/flutter (19791): #147 RenderStack.paintStack (package:flutter/src/rendering/stack.dart:602:5)

I/flutter (19791): #148 RenderStack.paint (package:flutter/src/rendering/stack.dart:610:7)

I/flutter (19791): #149 RenderObject._paintWithContext (package:flutter/src/rendering/object.dart:2264:7)

I/flutter (19791): #150 PaintingContext.paintChild (package:flutter/src/rendering/object.dart:184:13)

I/flutter (19791): #151 RenderBoxContainerDefaultsMixin.defaultPaint (package:flutter/src/rendering/box.dart:2515:15)

I/flutter (19791): #152 RenderFlex.paint (package:flutter/src/rendering/flex.dart:950:7)

I/flutter (19791): #153 RenderObject._paintWithContext (package:flutter/src/rendering/object.dart:2264:7)

I/flutter (19791): #154 PaintingContext.paintChild (package:flutter/src/rendering/object.dart:184:13)

I/flutter (19791): #155 RenderBoxContainerDefaultsMixin.defaultPaint (package:flutter/src/rendering/box.dart:2515:15)

I/flutter (19791): #156 RenderCustomMultiChildLayoutBox.paint (package:flutter/src/rendering/custom_layout.dart:404:5)

I/flutter (19791): #157 RenderObject._paintWithContext (package:flutter/src/rendering/object.dart:2264:7)

I/flutter (19791): #158 PaintingContext.paintChild (package:flutter/src/rendering/object.dart:184:13)

I/flutter (19791): #159 RenderProxyBoxMixin.paint (package:flutter/src/rendering/proxy_box.dart:129:15)

I/flutter (19791): #160 _RenderInkFeatures.paint (package:flutter/src/material/material.dart:531:11)

I/flutter (19791): #161 RenderObject._paintWithContext (package:flutter/src/rendering/object.dart:2264:7)

I/flutter (19791): #162 PaintingContext.paintChild (package:flutter/src/rendering/object.dart:184:13)

I/flutter (19791): #163 RenderProxyBoxMixin.paint (package:flutter/src/rendering/proxy_box.dart:129:15)

I/flutter (19791): #164 PaintingContext.pushLayer (package:flutter/src/rendering/object.dart:391:12)

I/flutter (19791): #165 RenderPhysicalModel.paint (package:flutter/src/rendering/proxy_box.dart:1800:15)

I/flutter (19791): #166 RenderObject._paintWithContext (package:flutter/src/rendering/object.dart:2264:7)

I/flutter (19791): #167 PaintingContext.paintChild (package:flutter/src/rendering/object.dart:184:13)

I/flutter (19791): #168 RenderProxyBoxMixin.paint (package:flutter/src/rendering/proxy_box.dart:129:15)

I/flutter (19791): #169 RenderObject._paintWithContext (package:flutter/src/rendering/object.dart:2264:7)

I/flutter (19791): #170 PaintingContext._repaintCompositedChild (package:flutter/src/rendering/object.dart:135:11)

I/flutter (19791): #171 PaintingContext.repaintCompositedChild (package:flutter/src/rendering/object.dart:95:5)

I/flutter (19791): #172 PipelineOwner.flushPaint (package:flutter/src/rendering/object.dart:980:29)

I/flutter (19791): #173 RendererBinding.drawFrame (package:flutter/src/rendering/binding.dart:404:19)

I/flutter (19791): #174 WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:884:13)

I/flutter (19791): #175 RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:284:5)

I/flutter (19791): #176 SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1113:15)

I/flutter (19791): #177 SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1052:9)

I/flutter (19791): #178 SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:968:5)

I/flutter (19791): #182 _invoke (dart:ui/hooks.dart:261:10)

I/flutter (19791): #183 _drawFrame (dart:ui/hooks.dart:219:3)

I/flutter (19791): (elided 6 frames from dart:async)

I/flutter (19791):

I/flutter (19791): Image provider: NetworkImage("", scale: 1.0)

I/flutter (19791): Image key: NetworkImage("", scale: 1.0)

I/flutter (19791): ═

Den torsdag 14 maj 2020 kl. 17:22:23 UTC+2 skrev Error Place:

Error Place

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May 14, 2020, 3:10:26 PM5/14/20

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Screenshot 2020-05-14 at 21.09.35.png

i think this is the one you wanted.

thanks again

Den torsdag 14 maj 2020 kl. 17:22:23 UTC+2 skrev Error Place:

Error Place

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May 15, 2020, 5:32:21 AM5/15/20

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Screenshot 2020-05-15 at 11.30.16.png

sorry for late response @SuzukiTomohiro. my system crashed. this is where i have set the breakpoint.

Den torsdag 14 maj 2020 kl. 17:22:23 UTC+2 skrev Error Place:

Error Place

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May 15, 2020, 5:42:16 AM5/15/20

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Screenshot 2020-05-15 at 11.41.10.png

Den torsdag 14 maj 2020 kl. 17:22:23 UTC+2 skrev Error Place:

Suzuki Tomohiro

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May 15, 2020, 5:53:24 AM5/15/20

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Good. I see the request is a map. It has “position” key. Create variable

p = request[“position”]

What’s in p? (Use debugger)

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Error Place

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May 15, 2020, 6:08:23 AM5/15/20

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you are awsome @SuzukiTomohiro. now i know how the debugger works. what a tool.

Screenshot 2020-05-15 at 12.03.19.png

i am not sure if i am implementing it the right way though. my map still dosent show any markers.

Den torsdag 14 maj 2020 kl. 17:22:23 UTC+2 skrev Error Place:

Suzuki Tomohiro

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May 15, 2020, 6:26:34 AM5/15/20

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As you know how to use the debugger, you can separate the problem of Firestore data fetch from the usage of map markers.

Step execution line by line is a nice tool if you haven’t tried. (Marked yellow in the picture below)

Of course, I cannot tell whether your current approach is right or not. So far I feel it’s right way to fetch data from Firestore and render markers on a map.

Good luck.

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Error Place

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May 15, 2020, 6:51:25 AM5/15/20

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thank you again suzuki. sorry guys that i am bothering again and again. i have tried to see where it goes wrong and used different approaches. verbose says

[VERBOSE-2:ui_dart_state.cc(157)] Unhandled Exception: 'package:google_maps_flutter_platform_interface/src/types/location.dart': Failed assertion: line 19 pos 16: 'latitude != null': is not true.

#0 _AssertionError._doThrowNew (dart:core-patch/errors_patch.dart:42:39)

#1 _AssertionError._throwNew (dart:core-patch/errors_patch.dart:38:5)

#2 new LatLng (package:google_maps_flutter_platform_interface/src/types/location.dart:19:16)

#3 _MapScreenState.initMarker (package:luncha/screen/map_screen.dart:59:13)

#4 _MapScreenState._populateMarks.<anonymous closure> (package:luncha/screen/map_screen.dart:72:11)

#5 _rootRunUnary (dart:async/zone.dart:1192:38)

#6 _CustomZone.runUnary (dart:async/zone.dart:1085:19)

#7 _FutureListener.handleValue (dart:async/future_impl.dart:141:18)

#8 Future._propagateToListeners.handleValueCallback (dart:async/future_impl.dart:682:45)

#9 Future._propagateToListeners (dart:async/future_impl.dart:711:32)

#10 Future._completeWith<…>

i think if latitude is not null it should place a marker then?

Den torsdag 14 maj 2020 kl. 17:22:23 UTC+2 skrev Error Place:

Suzuki Tomohiro

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May 15, 2020, 8:23:57 AM5/15/20

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Read the stacktrace and the error message. It guides you where to set a breakpoint for the debugger.

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Error Place

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May 15, 2020, 8:25:02 AM5/15/20

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it is working now .

LatLng(p['geopoint'].latitude,p['geopoint'].longitude),

this is the way .

wanted to thank you again @suzukiTomohiro for your effort and all help.

you are the king

Den torsdag 14 maj 2020 kl. 17:22:23 UTC+2 skrev Error Place:

Error Place

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May 15, 2020, 8:53:38 AM5/15/20

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Now i just realized another problem. When I rerun the app the markers get vanished . @suzukiTomohiro is it possible to get this code inside a streambuilder?

Thank and sorry for all trouble again

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Souvik Dutta

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May 15, 2020, 9:00:25 AM5/15/20

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Obviously you are not saving the data...

To view this discussion on the web visit https://groups.google.com/d/msgid/flutter-dev/CALrmTh2OrPx12D%2BXb8aEHoNeirFQvT7q7rKqpawDyEEJwGat3w%40mail.gmail.com.

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