I'm using angular cli to build a website which contains multiple languages. I use ng2-translate for the translations.
I import a languages.json file defined in angular-cli.json:
"assets": [
"assets",
"fonts",
"languages.json"
],
In my controller, I retrieve the data using require:
this.languages = require('../../../../languages.json');
Loading the json file works. After deploying, I tried to change (add or remove) some languages in the languages.json, but the changes does not get shown in the website even though the json file is updated in dist. The only way I could update the website is by changing the original json file, making another build of the app and deploy again. Is there a way to make a change in the website by only updating the json file in dist?
For clarification, languages.json contains an array of language codes, which defines the languages shown in the language selector of the website. I hoped to use this config to change the languages shown in the website without rebuilding the app.
Here is my package.json :
{
"name": "myApp",
"version": "1.0.0",
"license": "MIT",
"scripts": {
"ng": "ng",
"start": "ng serve",
"dev": "ng serve --environment=dev",
"acc": "ng serve --environment=acc",
"prod": "ng serve --environment=prod",
"build:dev": "ng build --environment=dev",
"build:acc": "ng build --environment=acc",
"build:prod": "ng build --environment=prod",
"build": "ng build",
"test": "ng test",
"lint": "ng lint",
"e2e": "ng e2e"
},
"private": true,
"dependencies": {
"@angular/animations": "^4.0.2",
"@angular/common": "^4.0.0",
"@angular/compiler": "^4.0.0",
"@angular/compiler-cli": "^4.0.0",
"@angular/core": "^4.0.0",
"@angular/forms": "^4.0.0",
"@angular/http": "^4.0.0",
"@angular/platform-browser": "^4.0.0",
"@angular/platform-browser-dynamic": "^4.0.0",
"@angular/platform-server": "^4.0.0",
"@angular/router": "^4.0.0",
"angular2-localstorage": "git+https://github.com/zoomsphere/angular2-localstorage.git#master",
"core-js": "^2.4.1",
"foundation-sites": "^6.3.1",
"ng2-translate": "^5.0.0",
"rxjs": "^5.1.0",
"zone.js": "^0.8.5"
},
"devDependencies": {
"@angular/cli": "1.0.0",
"@types/jasmine": "2.5.46",
"@types/node": "~7.0.12",
"codelyzer": "~3.0.0-beta.4",
"jasmine-core": "~2.5.2",
"jasmine-spec-reporter": "~3.2.0",
"karma": "~1.5.0",
"karma-chrome-launcher": "~2.0.0",
"karma-cli": "~1.0.1",
"karma-jasmine": "~1.1.0",
"karma-jasmine-html-reporter": "^0.2.2",
"karma-coverage-istanbul-reporter": "^1.0.0",
"protractor": "~5.1.0",
"ts-node": "~3.0.2",
"tslint": "~4.5.1",
"typescript": "^2.2.2"
}
You can't change the content of JSON file directly through angular, you need the Backend in order to reflect the change on that JSON file.
The angular. json file at the root level of an Angular workspace provides workspace-wide and project-specific configuration defaults. These are used for build and development tools provided by the Angular CLI. Path values given in the configuration are relative to the root workspace directory.
It seems I have exactly the same issue right now and I used this tutorial : https://aclottan.wordpress.com/2016/12/30/load-configuration-from-external-file/
If I understand well, your need is to have an "external" variable you can modify without having to change app code and rebuild ?
If so, here what I did, applied to your exemple :
In this demo i will use this for exemple :
{
"languages": ["en", "fr"]
}
environment.ts :
export const environment = {
production: false,
languageFile: 'assets/languages.json'
};
environment.prod.ts :
export const environment = {
production: true,
languageFile: 'assets/languages.json'
};
For exemple:
export class Configuration {
languages: string[];
}
import { Injectable } from '@angular/core';
import { Http } from '@angular/http';
import { Configuration } from './configuration';
@Injectable()
export class ConfigService {
private config: Configuration;
constructor(private http: Http) {
}
load(url: string) {
return new Promise((resolve) => {
this.http.get(url).map(res => res.json())
.subscribe(config => {
this.config = config;
resolve();
});
});
}
getConfiguration(): Configuration {
return this.config;
}
}
import { APP_INITIALIZER } from '@angular/core';
import { HttpModule } from '@angular/http';
import { ConfigService } from './config.service';
import { environment } from '../environments/environment';
export function ConfigLoader(configService: ConfigService) {
return () => configService.load(environment.languageFile);
}
providers: [
ConfigService,
{
provide : APP_INITIALIZER,
useFactory: ConfigLoader,
deps : [ConfigService],
multi : true
},
....
]
Here an exemple in a component.
@Injectable()
export class MyComponent {
languages: string[];
constructor(private configService: ConfigService) {}
ngOnInit() {
this.languages = this.configService.getConfiguration().languages;
}
}
In my case, it seems that I have to reload the server to take in account modification.
Hope it will help :)
PS : sorry for eventual english or technical mistakes in this message (I wrote it quickly during lunchtime)
When you use require()
the compiler will actually "inline" the JSON file in the main.bundle.js
and will not use the file in assets
Seems like what you need is to use an http service to retrieve the JSON file instead of using require()
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With