TypeError：无法读取未定义的属性'length' - Ionic和WordPress

1 回答

• 0

  我不知道wp.js中的问题（提供者wp-api-angular）我有这个代码和obj，不在代码中：

  import { Injectable } from '@angular/core';
  import 'rxjs/add/operator/map';
  import { Observable } from 'rxjs/Observable';
  import { WpApiPosts, WpApiMedia, WpApiUsers } from 'wp-api-angular';
  import { Http, HttpModule } from '@angular/http';
  
  export class Post {
    public media_url: Observable<string>;
    constructor(public authorId: number, public id: number, public title: string, public content: string, public excerpt: string, public date: string, public mediaId?: number) { }
  }
  
  export class User {
    constructor(public id: number, public name: string, public userImageUrl: string) { }
  }
  
  @Injectable()
  export class WpProvider {
  
    users: User[];
  
     constructor(public wpApiPosts: WpApiPosts, public wpApiMedia: WpApiMedia, public wpApiUsers: WpApiUsers) {
       this.wpApiUsers.getList()
         .map(res => res.json())
         .subscribe(data => {
           this.users = [];
           for (let user of data) {
             let oneUser = new User(user[ 'id' ], user[ 'name' ], user[ 'avatar_urls' ][ '96' ]);
             this.users.push(oneUser);
           }
         })
     }
  
     getPosts(): Observable<Post[]> {
      return this.wpApiPosts.getList()
        .map(res => res.json())
        .map(data => {
          var posts = [];
          for (let post of data) {
            let onePost = new Post(post[ 'author' ], post[ 'id' ], post[ 'title' ][ 'rendered' ], post[ 'content' ][ 'rendered' ], post[ 'excerpt' ][ 'rendered' ], post[ 'date' ], post[ 'featured_media' ]);
            onePost.media_url = this.getMedia(onePost.mediaId);
            posts.push(onePost);
          }
          return posts;
        });
    }
  
    getMedia(id: number): Observable<string> {
      return this.wpApiMedia.get(id)
        .map(res => res.json())
        .map(data => {
          return data[ 'source_url' ];
        });
    }
  
    getUserImage(userId: number) {
      for (let usr of this.users) {
        if (usr.id === userId) {
          return usr.userImageUrl;
        }
      }
    }
  
    getUserName(userId: number) {
      for (let usr of this.users) {
        if (usr.id === userId) {
          return usr.name;
        }
      }
    }
  
  }
  

  回复于 2024-04-28T16:27:27+08:00