Rails新手问题......
我有一个没有错误提交的表单，但表单参数没有保存到数据库中。但是，通过rails控制台添加数据工作正常。目前，提交表单时，数据将以nil形式输入db。
对于为什么会发生这种情况的任何反馈都将非常感激。另外，请注意，此时我对SuggestionBox唯一关注的两个值是name和short_name。
提前获取任何帮助！
*注意：此时我唯一关注的值是name和short_name *
# == Schema Information
#
# Table name: suggestion_boxes
#
# id :integer not null, primary key
# name :string(255)
# created_at :datetime not null
# updated_at :datetime not null
# passcode :string(255)
# suggestion_id :integer
# organization_id :integer
# short_name :string(255)
# owner_email :string(255)
# owner_name :string(255)
#
class SuggestionBox < ActiveRecord::Base
attr_accessible :name , :passcode, :short_name
belongs_to :organization
has_many :suggestions, :dependent => :destroy
end
（我只包括新的和创建动作）
class SuggestionBoxesController < ApplicationController
before_filter :authenticate
def new
@suggestion_box = SuggestionBox.new
respond_to do |format|
format.html # new.html.erb
format.json { render json: @suggestion_box }
end
end
def create
@suggestion_box = SuggestionBox.new(params[:suggestion])
respond_to do |format|
if @suggestion_box.save
format.html { redirect_to @suggestion_box, notice: "Your suggestion box has been created." }
format.json { render json: @suggestion_box, status: :created, location: @suggestion_box }
else
format.html { render action: "new" }
format.json { render json: @suggestion_box.errors, status: :unprocessable_entity }
end
end
end
end
这是在new.html.erb
中使用的_form.html.erb文件 <%= form_for(@suggestion_box) do |f| %>
<% if @suggestion_box.errors.any? %>
<div id="error_explanation">
<h2><%= pluralize(@suggestion_box.errors.count, "error") %> prohibited this suggestion_box from being saved:</h2>
<ul>
<% @suggestion_box.errors.full_messages.each do |msg| %>
<li><%= msg %></li>
<% end %>
</ul>
</div>
<% end %>
<div class="field">
<%= f.label :name %><br />
<%= f.text_field :name %>
</div>
<div class="field">
<%= f.label :short_name %><br />
<%= f.text_field :short_name %>
</div>
<div class="field">
<%= f.label :passcode %><br />
<%= f.text_field :passcode %>
</div>
<div class="actions">
<%= f.submit %>
</div>
<% end %>
这是日志输出，显示为name和short_name添加到db的nil值。
Started GET "/suggestion_boxes/new" for 127.0.0.1 at 2013-07-29 12:34:23 -0400
Processing by SuggestionBoxesController#new as HTML
Rendered suggestion_boxes/_form.html.erb (164.7ms)
Rendered suggestion_boxes/new.html.erb within layouts/application (166.6ms)
Rendered layouts/_flashes.html.haml (0.2ms)
Completed 200 OK in 175ms (Views: 173.9ms | ActiveRecord: 0.0ms)
Started GET "/assets/screen.css?body=1" for 127.0.0.1 at 2013-07-29 12:34:23 -0400
Served asset /screen.css - 304 Not Modified (0ms)
Started POST "/suggestion_boxes" for 127.0.0.1 at 2013-07-29 12:34:40 -0400
Processing by SuggestionBoxesController#create as HTML
Parameters: {"utf8"=>"✓", "authenticity_token"=>"vpzqsKOA4PLgDJXgb8s28tktcXermcB/+CrQZNMhGCI=", "suggestion_box"=>{"name"=>"testy box", "short_name"=>"tsty", "passcode"=>"123"}, "commit"=>"Create Suggestion box"}
(0.1ms) begin transaction
SQL (72.4ms) INSERT INTO "suggestion_boxes" ("created_at", "name", "organization_id", "owner_email", "owner_name", "passcode", "short_name", "suggestion_id", "updated_at") VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?) [["created_at", Mon, 29 Jul 2013 16:34:40 UTC +00:00], ["name", nil], ["organization_id", nil], ["owner_email", nil], ["owner_name", nil], ["passcode", nil], ["short_name", nil], ["suggestion_id", nil], ["updated_at", Mon, 29 Jul 2013 16:34:40 UTC +00:00]]
(3.3ms) commit transaction
Redirected to http://localhost:3000/suggestion_boxes/6
Completed 302 Found in 82ms (ActiveRecord: 75.8ms)
答案 0 :(得分：4)
正如您在日志中看到的那样，params哈希是这样的：
"suggestion_box"=>{"name"=>"testy box", "short_name"=>"tsty", "passcode"=>"123"}
在你的create行动中，你得到了这个：
@suggestion_box = SuggestionBox.new(params[:suggestion])
但是你应该在你的参数哈希上使用这个名字：params[:suggestion_box]
答案 1 :(得分：2)
你的参数在密钥suggestion_box下按原样进入。
您的代码使用suggestion，这不是params的内容，正如您发布的日志所示，并且通常由Rails假设。