我不能为我的生活弄清楚为什么我的回形针附件的某些属性不会通过嵌套属性保存到数据库中。我的帖子有一个附件,但是:附件属性的媒体参数没有被保存,但正在创建附件对象。我想我有一些东西搞砸了我的强力传递的方式。提前谢谢。
NIL Params
media_file_name: nil, media_content_type: nil, media_file_size: nil, media_updated_at: nil>
IRB:
irb(main):001:0> p = Post.last
Post Load (0.1ms) SELECT "posts".* FROM "posts" ORDER BY "posts"."id" DESC LIMIT 1
=> #<Post id: 40, body: "test info", expiration: 1467065130586, created_at: "2016-06-27 21:05:41", updated_at: "2016-06-27 21:05:41">
irb(main):002:0> p.attachment
Attachment Load (0.2ms) SELECT "attachments".* FROM "attachments" WHERE "attachments"."attachable_id" = ? AND "attachments"."attachable_type" = ? LIMIT 1 [["attachable_id", 40], ["attachable_type", "Post"]]
=> #<Attachment id: 26, attachable_id: 40, attachable_type: "Post", created_at: "2016-06-27 21:05:41", updated_at: "2016-06-27 21:05:41", media_file_name: nil, media_content_type: nil, media_file_size: nil, media_updated_at: nil>
irb(main):003:0>
架构:
ActiveRecord::Schema.define(version: 20160627165514) do
create_table "attachments", force: :cascade do |t|
t.integer "attachable_id"
t.string "attachable_type"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.string "media_file_name"
t.string "media_content_type"
t.integer "media_file_size"
t.datetime "media_updated_at"
end
add_index "attachments", ["attachable_type", "attachable_id"], name: "index_attachments_on_attachable_type_and_attachable_id"
create_table "posts", force: :cascade do |t|
t.text "body"
t.integer "expiration", limit: 8
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
end
end
发布模型:
class Post < ActiveRecord::Base
has_one :attachment, as: :attachable, dependent: :destroy
accepts_nested_attributes_for :attachment
end
后控制器:
class PostsController < ApplicationController
def show
#I don't need this.
end
def index
@posts = Post.all
end
def new
@post = Post.new
@post.build_attachment
end
def create
@post = Post.new(post_params)
@post.build_attachment
if @post.save
respond_to do |format|
format.html {redirect_to(posts_path, notice:"Post succesfully created")}
format.js
end
else
render :new
end
end
private
def post_params
params.require(:post).permit(:body,:expiration, attachment_attributes: [:media])
end
end
附件模型:
class Attachment < ActiveRecord::Base
belongs_to :attachable, polymorphic:true
has_attached_file :media
end
HTML表格:
<%=form_for(@post, url: posts_path, html:{multipart:true}) do |form|%>
<%=form.text_area :body%>
<%=fields_for(:attachment) do |ff|%>
<%= ff.file_field :media %>
<%end%>
<%=form.hidden_field :expiration%>
<%=form.submit "Post", class: "post-submit-button"%>
<%end%>
Log Dumb:
Started POST "/posts" for ::1 at 2016-06-27 16:05:41 -0500
Processing by PostsController#create as HTML
Parameters: {"utf8"=>"✓", "authenticity_token"=>"/b54OJOBJIaR551MAHDujCxjciI7OAx93EQAVrugCz0xtYnafaSH4widYOftZJUbDHLfmI6jly5eG5AxCCNJbQ==", "post"=>{"body"=>"test info", "expiration"=>"1467065130586"}, "attachment"=>{"media"=>"IMG_1004.jpg"}, "commit"=>"Post"}
(0.1ms) begin transaction
SQL (0.3ms) INSERT INTO "posts" ("body", "expiration", "created_at", "updated_at") VALUES (?, ?, ?, ?) [["body", "test info"], ["expiration", 1467065130586], ["created_at", "2016-06-27 21:05:41.321484"], ["updated_at", "2016-06-27 21:05:41.321484"]]
SQL (0.1ms) INSERT INTO "attachments" ("attachable_type", "attachable_id", "created_at", "updated_at") VALUES (?, ?, ?, ?) [["attachable_type", "Post"], ["attachable_id", 40], ["created_at", "2016-06-27 21:05:41.323335"], ["updated_at", "2016-06-27 21:05:41.323335"]]
(1.4ms) commit transaction
Redirected to http://localhost:3000/posts
Completed 302 Found in 8ms (ActiveRecord: 1.9ms)
Started GET "/posts" for ::1 at 2016-06-27 16:05:41 -0500
Processing by PostsController#index as HTML
Rendered layouts/_user_menu.html.erb (0.1ms)
Rendered posts/index.html.erb within layouts/application (1.8ms)
Completed 200 OK in 26ms (Views: 25.8ms | ActiveRecord: 0.0ms)
答案 0 :(得分:0)
您没有将fields_for
绑定到您的表单。试试这个:
<%=form_for(@post, url: posts_path, html:{multipart:true}) do |form|%>
<%=form.text_area :body%>
<%= form.fields_for(:attachment) do |ff|%>
<%= ff.file_field :media %>
<% end %>
<%=form.hidden_field :expiration%>
<%=form.submit "Post", class: "post-submit-button"%>
<%end%>