Question

我不能为我的生活弄清楚为什么它一直告诉我＆＃34; post＆＃34;未定义，在home.component.ts下面的第20行。你们中的任何一个代码都可以检查我......谢谢

home.component.ts

runaway = 1;

post.ts

import { Component, OnInit } from '@angular/core';
import { Post } from '../_models/index';
import { PostService } from '../_services/index';
@Component({
    moduleId: module.id,
    templateUrl: 'home.component.html'
})
export class HomeComponent implements OnInit {
    posts: Post[] = [];

    constructor(private postService: PostService) { }

    ngOnInit() {
        // get posts from secure api end point
        this.postService.getPosts().subscribe(users => {
            this.posts = post;
        });
    }
}

post.service.ts

import { Injectable } from '@angular/core';
import {Author} from "./author";

@Injectable()
export class Post {
    id:number;
    author:Author;
    subscribed:boolean;
    created:string;
    active:boolean;
    text:string;
    comments:string[];

    constructor(id:number, author:Author, subscribed:boolean, created:string, active:boolean, text:string, comments:string[]) {
        this.id = id;
        this.author = author;
        this.subscribed = subscribed;
        this.created = created;
        this.active = active;
        this.text = text;
        this.comments = comments;
    }

    public static getPosts():Post{
        return new Post(0, null, null, "", null, "",null);
    }
}

如果您需要，请告诉我。感谢

Answer 1

因为未声明变量post。

我猜你试图做这样的事情：

import { Component, OnInit } from '@angular/core';
import { Post } from '../_models/index';
import { PostService } from '../_services/index';

@Component({
    moduleId: module.id,
    templateUrl: 'home.component.html'
})
export class HomeComponent implements OnInit {
    posts: Post[] = [];

constructor(private postService: PostService) { }

ngOnInit() {
    // get users from secure api end point
    this.postService.getPosts()
        .subscribe(post => {
            this.posts = post;
        });
    }
}

问题在于： .subscribe(user => {已更改为.subscribe(post => {

无法在.suscbribe中找到变量

1 个答案: