address comments

Author: lixun910

src/layers/src/arc-layer/arc-layer.ts

@@ -314,7 +314,7 @@ export default class ArcLayer extends Layer {
         lat1: fieldPairs[1].pair.lat,
         lng1: fieldPairs[1].pair.lng
       },
-      label: `${fieldPairs[0].defaultName} -> ${fieldPairs[1].defaultName} arc`
+      label: `${fieldPairs[0].defaultName || 'point'} -> ${fieldPairs[1].defaultName || 'point'} arc`
     };
 
     return {props: [props]};

src/layers/src/line-layer/line-layer.ts

@@ -260,7 +260,7 @@ export default class LineLayer extends ArcLayer {
         geoarrow0: {...defaultAltColumn},
         geoarrow1: {...defaultAltColumn}
       },
-      label: `${fieldPairs[0].defaultName} -> ${fieldPairs[1].defaultName} line`,
+      label: `${fieldPairs[0].defaultName || 'point'} -> ${fieldPairs[1].defaultName || 'point'} line`,
       isVisible: false
     };
 

test/node/utils/kepler-table-test.js

@@ -278,7 +278,7 @@ test('KeplerTable -> findPointFieldPairs', t => {
           suffix: ['lat', 'lng']
         },
         {
-          defaultName: 'point',
+          defaultName: '',
           pair: {
             lat: {
               fieldIdx: 3,
@@ -343,7 +343,7 @@ test('KeplerTable -> findPointFieldPairs', t => {
           suffix: ['lat', 'long']
         },
         {
-          defaultName: 'point',
+          defaultName: '',
           pair: {
             lat: {
               fieldIdx: 3,