Angular7开发环境模块构造函数未运行

Question

我继承了现有的Angular7代码库。

其中一个模块在其构造函数中包含一些初始化代码，如下所示：

@NgModule({...})
export class SomeModule {
    constructor(private injector: Injector) {
        // some code
    }
}

我遇到的问题是，使用ng serve运行时，在开发环境中未调用构造函数。但是，如果我使用ng serve --prod运行，则将调用该代码，并且一切正常。

有人可以指出我的问题吗？我已经尝试了几乎所有内容，但似乎无济于事。

编辑

angular.json

的内容

{
  "$schema": "./node_modules/@angular/cli/lib/config/schema.json",
  "version": 1,
  "newProjectRoot": "projects",
  "projects": {
    "projectName": {
      "root": "",
      "sourceRoot": "src",
      "projectType": "application",
      "prefix": "app",
      "schematics": {
        "@schematics/angular:component": {
          "spec": false,
          "inlineTemplate": false,
          "viewEncapsulation": "None",
          "prefix": "",
          "styleext": "scss",
          "changeDetection": "OnPush"
        },
        "@schematics/angular:directive": {
          "spec": false,
          "prefix": "",
          "changeDetection": "OnPush"
        },
        "@schematics/angular:service": {
          "spec": false
        }
      },
      "architect": {
        "build": {
          "builder": "@angular-devkit/build-angular:browser",
          "options": {
            "outputPath": "../dist",
            "index": "src/index.html",
            "main": "src/main.ts",
            "polyfills": "src/polyfills.ts",
            "tsConfig": "src/tsconfig.app.json",
            "assets": [
              "src/favicon.ico",
              "src/assets",
              "src/manifest.json"
            ],
            "styles": [
              "src/scss/styles.scss"
            ],
            "scripts": []
          },
          "configurations": {
            "production": {
              "fileReplacements": [
                {
                  "replace": "src/environments/environment.ts",
                  "with": "src/environments/environment.prod.ts"
                }
              ],
              "optimization": true,
              "outputHashing": "all",
              "sourceMap": true,
              "extractCss": true,
              "namedChunks": false,
              "commonChunk": false,
              "aot": true,
              "extractLicenses": true,
              "vendorChunk": false,
              "buildOptimizer": true,
              "serviceWorker": true
            }
          }
        },
        "serve": {
          "builder": "@angular-devkit/build-angular:dev-server",
          "options": {
            "browserTarget": "projectName:build",
            "proxyConfig": "proxy.conf.json"
          },
          "configurations": {
            "production": {
              "browserTarget": "projectName:build:production"
            }
          }
        },
        "extract-i18n": {
          "builder": "@angular-devkit/build-angular:extract-i18n",
          "options": {
            "browserTarget": "projectName:build"
          }
        },
        "test": {
          "builder": "@angular-devkit/build-angular:karma",
          "options": {
            "main": "src/test.ts",
            "polyfills": "src/polyfills.ts",
            "tsConfig": "src/tsconfig.spec.json",
            "karmaConfig": "src/karma.conf.js",
            "styles": [
              {
                "input": "node_modules/@angular/material/prebuilt-themes/indigo-pink.css"
              },
              "src/styles.scss"
            ],
            "scripts": [],
            "assets": [
              "src/favicon.ico",
              "src/assets",
              "src/manifest.json"
            ]
          }
        },
        "lint": {
          "builder": "@angular-devkit/build-angular:tslint",
          "options": {
            "tsConfig": [
              "src/tsconfig.app.json",
              "src/tsconfig.spec.json"
            ],
            "exclude": [
              "**/node_modules/**"
            ]
          }
        }
      }
    },
    "projectName-e2e": {
      "root": "e2e/",
      "projectType": "application",
      "architect": {
        "e2e": {
          "builder": "@angular-devkit/build-angular:protractor",
          "options": {
            "protractorConfig": "e2e/protractor.conf.js",
            "devServerTarget": "projectName:serve"
          }
        },
        "lint": {
          "builder": "@angular-devkit/build-angular:tslint",
          "options": {
            "tsConfig": "e2e/tsconfig.e2e.json",
            "exclude": [
              "**/node_modules/**"
            ]
          }
        }
      }
    }
  },
  "defaultProject": "projectName"
}

environment.ts的内容：

export const environment = {
  production: false
};

environment.prod.ts的内容：

export const environment = {
  production: true
};

编辑 我启用了AOT，现在该项目在开发环境中运行良好。