'TS2305: Module '"typeorm"' has no exported member 'Column' with Ionic v6 and angular 12

I recently update Ionic v5 to v6 and angular v10 to v12 then this typeorm error is shown when I run the ionic build command

ERROR in src/app/entities/ttAgrupacion.ts:1:9 - error TS2305: Module '"typeorm"' has no exported member 'Column'.

1 import {Column, Entity, Index, PrimaryGeneratedColumn} from 'typeorm';
          ~~~~~~
src/app/entities/ttAgrupacion.ts:1:17 - error TS2305: Module '"typeorm"' has no exported member 'Entity'.

1 import {Column, Entity, Index, PrimaryGeneratedColumn} from 'typeorm';
                  ~~~~~~
src/app/entities/ttAgrupacion.ts:1:25 - error TS2305: Module '"typeorm"' has no exported member 'Index'.

1 import {Column, Entity, Index, PrimaryGeneratedColumn} from 'typeorm';
                          ~~~~~
src/app/entities/ttAgrupacion.ts:1:32 - error TS2305: Module '"typeorm"' has no exported member 'PrimaryGeneratedColumn'.

1 import {Column, Entity, Index, PrimaryGeneratedColumn} from 'typeorm';

This things already try to fix this issue with out success.

1- delete node_modules and package and npm install later 2- close and open de IDE 3- reinstall typeorm

Observations

1- if I run the build with ionic serve the entire app works OK.

ttAgrupacion.ts

import {Column, Entity, Index, PrimaryGeneratedColumn} from 'typeorm';


@Index(['iddistribuidora','idagr'])
@Entity('ttAgrupacion')
export  class ttAgrupacion {

  @PrimaryGeneratedColumn( )
  id: number;
  @Column({ nullable: true , type: 'varchar'})
  color:string;
  @Column({ nullable: true, type: 'varchar' })
  descripcion: string;
  @Column({ nullable: true, type: 'varchar' })
  idagr: string;
  @Column({ nullable: true , type: 'varchar'})
  iddistribuidora: string;
  @Column({ nullable: true, type: 'int' })
  idsucursal: number;
  @Column({ nullable: true, type: 'int' })
  idfuerzaventas: number;
  @Column({ nullable: true , type: 'varchar'})
  idfiltro: string;
  @Column({ nullable: true, type: 'varchar' })
  imagen: string;

  seleccionado: boolean | false;
  isexpandido: boolean | false;
  orden: number;
  orden2: number;
  stringify:string;
  url: string;
  ispromo:boolean|false;
  ishot:boolean|false;
  iscombo:boolean|false;
  
    constructor() {
  }

  

}

package.json

 "sideEffects": false,
  "browser": {},
  "private": true,
  "dependencies": {
    "@angular/animations": "12.2.16",
    "@angular/common": "12.2.16",
    "@angular/compiler": "12.2.16",
    "@angular/core": "12.2.16",
    "@angular/fire": "^5.4.2",
    "@angular/forms": "12.2.16",
    "@angular/http": "7.2.16",
    "@angular/platform-browser": "12.2.16",
    "@angular/platform-browser-dynamic": "12.2.16",
    "@angular/router": "12.2.16",
    "@awesome-cordova-plugins/core": "^5.39.1",
    "@awesome-cordova-plugins/keyboard": "^5.39.1",
    "@ionic-native/app-update": "^5.36.0",
    "@ionic-native/barcode-scanner": "^5.36.0",
    "@ionic-native/clipboard": "5.36.0",
    "@ionic-native/core": "^5.36.0",
    "@ionic-native/fcm": "5.27.0",
    "@ionic-native/file": "5.27.0",
    "@ionic-native/firebase-analytics": "5.30.0",
    "@ionic-native/geolocation": "5.27.0",
    "@ionic-native/google-plus": "5.27.0",
    "@ionic-native/in-app-browser": "5.27.0",
    "@ionic-native/ionic-webview": "^5.36.0",
    "@ionic-native/native-audio": "5.27.0",
    "@ionic-native/splash-screen": "5.27.0",
    "@ionic-native/status-bar": "5.27.0",
    "@ionic/angular": "^6.1.5",
    "@ionic/angular-server": "^6.1.4",
    "@ionic/cli": "^6.17.1",
    "@ionic/core": "^6.1.5",
    "@ionic/storage": "2.1.3",
    "compare-func": "2.0.0",
    "cordova-android": "10.1.1",
    "cordova-clipboard": "1.3.0",
    "cordova-plugin-firebase-analytics": "5.0.0",
    "cordova-support-android-plugin": "1.0.2",
    "cordova-support-google-services": "1.4.1",
    "firebase-admin": "^9.11.1",
    "ion2-calendar": "3.0.0-rc.0",
    "natives": "^1.1.6",
    "ngx-mask": "8.1.6",
    "patch-package": "^6.4.7",
    "rxjs": "~6.6.0",
    "tslib": "^2.0.0",
    "zone.js": "~0.11.5"
  },
  "devDependencies": {
    "@angular-builders/custom-webpack": "9.2.0",
    "@angular-builders/dev-server": "7.3.1",
    "@angular-devkit/architect": "^0.1202.6",
    "@angular-devkit/build-angular": "~12.2.17",
    "@angular-devkit/core": "^12.2.6",
    "@angular-devkit/schematics": "^12.2.6",
    "@angular/cli": "12.2.17",
    "@angular/compiler-cli": "12.2.16",
    "@angular/language-service": "12.2.16",
    "@firebase/app": "0.6.1",
    "@firebase/polyfill": "0.3.29",
    "@ionic-native/app-availability": "5.27.0",
    "@ionic-native/app-version": "5.27.0",
    "@ionic-native/device": "5.27.0",
    "@ionic-native/sign-in-with-apple": "5.27.0",
    "@ionic-native/unique-device-id": "5.27.0",
    "@ionic/angular-toolkit": "^5.0.3",
    "@ionic/app-scripts": "^3.0.0",
    "@types/file-saver": "2.0.0",
    "@types/googlemaps": "3.25.36",
    "@types/jasmine": "~3.5.0",
    "@types/jasminewd2": "~2.0.3",
    "@types/node": "^12.20.47",
    "angular-ionic-cli-builders": "^2.1.4",
    "angular2-uuid": "1.1.1",
    "bluebird": "3.5.1",
    "codelyzer": "^6.0.0",
    "compression-webpack-plugin": "6.1.1",
    "cordova": "10.0.0",
    "cordova-ios": "6.2.0",
    "cordova-plugin-app-launcher": "0.4.0",
    "cordova-plugin-app-version": "0.1.9",
    "cordova-plugin-appavailability": "0.4.2",
    "cordova-plugin-apple-login": "1.0.0",
    "cordova-plugin-browsertab": "0.2.0",
    "cordova-plugin-buildinfo": "2.0.3",
    "cordova-plugin-camera": "4.1.0",
    "cordova-plugin-compat": "1.2.0",
    "cordova-plugin-device": "2.0.3",
    "cordova-plugin-fcm-with-dependecy-updated": "7.8.0",
    "cordova-plugin-file": "6.0.2",
    "cordova-plugin-geolocation": "2.4.3",
    "cordova-plugin-googleplayservices": "19.0.3",
    "cordova-plugin-googleplus": "8.5.2",
    "cordova-plugin-inappbrowser": "4.0.0",
    "cordova-plugin-ionic-keyboard": "2.2.0",
    "cordova-plugin-ionic-webview": "5.0.0",
    "cordova-plugin-nativeaudio": "3.0.9",
    "cordova-plugin-nativestorage": "2.3.2",
    "cordova-plugin-sign-in-with-apple": "0.1.1",
    "cordova-plugin-splashscreen": "6.0.0",
    "cordova-plugin-statusbar": "2.4.3",
    "cordova-plugin-uniquedeviceid": "1.3.2",
    "cordova-plugin-whitelist": "1.3.5",
    "cordova-sqlite-storage": "^6.0.0",
    "core-js": "2.5.4",
    "file-saver": "2.0.0",
    "firebase": "7.14.0",
    "gulp-sass": "4.0.2",
    "info.protonet.imageresizer": "0.1.1",
    "jasmine-core": "~3.6.0",
    "jasmine-spec-reporter": "~5.0.0",
    "karma": "~6.3.19",
    "karma-chrome-launcher": "~3.1.0",
    "karma-coverage-istanbul-reporter": "~3.0.2",
    "karma-jasmine": "~4.0.0",
    "karma-jasmine-html-reporter": "~1.5.0",
    "local-storage": "1.4.2",
    "moment": "2.27.0",
    "ng2-reactive-forms-validators": "1.1.0",
    "ngx-mask-ionic": "1.1.2",
    "phonegap-plugin-barcodescanner": "^8.1.0",
    "protractor": "~7.0.0",
    "q": "1.5.1",
    "react-native-quick-sqlite": "^3.0.3",
    "reflect-metadata": "^0.1.12",
    "rimraf": "3.0.2",
    "sql.js": "1.3.2",
    "sqlite3": "^5.0.2",
    "sw-toolbox": "3.6.0",
    "terser-webpack-plugin": "^4.2.3",
    "ts-node": "~8.3.0",
    "tslint": "~6.1.0",
    "typeorm": "^0.2.31",
    "typescript": "~4.3.5",
    "webpack": "^4.46.0",
    "webpack-dev-server": "^4.2.0"
  },

tsconfig.json

{
  "compileOnSave": false,
  "compilerOptions": {
    "allowSyntheticDefaultImports": true,
    "baseUrl": "./",
    "outDir": "./dist/out-tsc",
    "sourceMap": true,
    "declaration": false,
    "module": "es2015",
    "moduleResolution": "node",
    "emitDecoratorMetadata": true,
    "experimentalDecorators": true,
    "strict": false,
    "allowJs": true,
    "target": "ES5",
    "skipLibCheck": true,
    "typeRoots": [
      "node_modules/@types"
    ],
    "lib": [
      "es5", "es6", "es7",
      "es2015", "es2016",
      "es2017", "es2018",
      "esnext",
      "dom"
    ]
  },
  "angularCompilerOptions": {
    "enableIvy": false ,
 
  },
  "include": [],
  "exclude": [
    "platforms",
    "node_modules",
    "**/*.spec.ts"
  ],
  "atom": {
    "rewriteTsconfig": false
  }
}

ionic info

Ionic:

   Ionic CLI                     : 5.4.16 (/usr/local/lib/node_modules/ionic)
   Ionic Framework               : @ionic/angular 6.1.5
   @angular-devkit/build-angular : 12.2.17
   @angular-devkit/schematics    : 12.2.17
   @angular/cli                  : 12.2.17
   @ionic/angular-toolkit        : 5.0.3

Cordova:

   Cordova CLI       : 10.0.0 ([email protected])
   Cordova Platforms : not available
   Cordova Plugins   : not available

Utility:

   cordova-res (update available: 0.15.4) : 0.15.3
   native-run (update available: 1.5.0)   : 1.4.0

System:

   Android SDK Tools : 26.1.1 
   ios-deploy        : 1.11.4
   ios-sim           : 8.0.2
   NodeJS            : v14.17.0 (/usr/local/bin/node)
   npm               : 6.14.13
   OS                : macOS Monterey
   Xcode             : Xcode 13.3.1 Build version 13E500a


Sources

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Source: Stack Overflow

Solution Source