Qpolygon 추가시 다른 Qpoiygon의 길이 사라지는 현상 수정

src/components/fabric/QPolygon.js

@@ -101,6 +101,7 @@ export const QPolygon = fabric.util.createClass(fabric.Polygon, {
 
   toObject: function (propertiesToInclude) {
     return fabric.util.object.extend(this.callSuper('toObject', propertiesToInclude), {
+      id: this.id,
       type: this.type,
       text: this.text,
       hips: this.hips,
@@ -163,11 +164,13 @@ export const QPolygon = fabric.util.createClass(fabric.Polygon, {
   },
 
   addLengthText() {
-    if (this.texts.length > 0) {
-      this.texts.forEach((text) => {
+    this.canvas
+      ?.getObjects()
+      .filter((obj) => obj.name === 'lengthText' && obj.parent === this)
+      .forEach((text) => {
         this.canvas.remove(text)
       })
-    }
+
     let points = this.getCurrentPoints()
 
     points.forEach((start, i) => {