我正在尝试将我的根目录中的静态JSON文件解析为已经预定义的对象,但我对如何让对象“读取”JSON文件中的每个属性并将其显示为拥有。我希望我不会因为它的内容而让它更加混乱?
我的一些代码:
class PostsController < ApplicationController
# before_action :set_post, except: [:index, :show]
# @@posts = File.read('app/assets/javascripts/flickr_feed.json')
# @posts = JSON.parse(string)
# GET /posts
# GET /posts.json
def index
@posts = Post.all
respond_to do |format|
format.html
format.json { render json: @@posts }
# format.json { render json: @@posts }
end
end
# GET /post/1
# GET /post/1.json
def show
@post = @post.assign_attributes JSON.parse(File.read('app/assets/javascripts/flickr_feed.json'))
respond_to do |format|
format.html
format.json { render json: @post }
end
end
...
如果我转到localhost:3000/posts.json
,我会看到欲望输出..
{
"title": "Recent Uploads tagged potato",
"link": "https://www.flickr.com/photos/tags/potato/",
"description": "",
"modified": "2015-11-21T08:41:44Z",
"generator": "https://www.flickr.com/",
"posts": [ // before was "items":
{
"title": "Hokkaido potato with butter",
"link": "https://www.flickr.com/photos/taking5/22873428920/",
"media": {"m":"https://farm6.staticflickr.com/5813/22873428920_3cac20cc47_m.jpg"},
"date_taken": "2015-07-18T08:16:24-08:00",
"description": " <p><a href=\"https://www.flickr.com/people/taking5/\">Taking5<\/a> posted a photo:<\/p> <p><a href=\"https://www.flickr.com/photos/taking5/22873428920/\" title=\"Hokkaido potato with butter\"><img src=\"https://farm6.staticflickr.com/5813/22873428920_3cac20cc47_m.jpg\" width=\"240\" height=\"180\" alt=\"Hokkaido potato with butter\" /><\/a><\/p> <p>Yummy.<\/p>",
"published": "2015-11-21T08:41:44Z",
"author": "nobody@flickr.com (Taking5)",
"author_id": "58375502@N00",
"tags": "japan hokkaido potato hakodate morningmarket"
}
]
}
...
但如果我去posts#index
我什么也看不见。我知道我没有正确解析数据,但我对如何做到这一点感到困惑。任何帮助将非常感谢。感谢
TL; DR:我想从JSON文件中解析每个项,以便能够post.title
,post.description
,等
编辑1:代码拼写错误更新。
编辑2:更新控制器中的代码
答案 0 :(得分:3)
您可以尝试:
@post = Post.new
@post.assign_attributes JSON.parse(File.read('app/assets/javascripts/flickr_feed.json'))
如果您使用protected_attributes
gem,则必须在模型中使用attr_accessible
定义使用此方式设置的属性,或者必须使用参数without_protection
。
编辑:
def index
@posts =
JSON.parse(File.read('app/assets/javascripts/flickr_feed.json'))["posts"].inject([]) do |_posts, post_attrs|
_posts << Post.new(post_attrs)
end
respond_to do |format|
format.html
format.json { render json: @posts }
end
end