Question

无论出于何种原因，这都不能节省。它会给我一个成功并重定向到它应该的页面，但是group项上的page_id是nil。

<%= simple_form_for group do |f| %>
    <%= f.input :page_id, 
        collection: @pages,
        selected: group.page,
        label: false
        %>
    <%= f.button :submit, "Assign Page" %>
<% end %>

控制器

def update
  group = Group.find(params[:id])
  group.update_attributes(group_params)
  redirect_to groups_path, notice: "Did it"
end

并且params（我已经尝试了所有的变化）。这里奇怪的是，表格似乎是在创建一个嵌套的参数。

def group_params
  params.require(:group).permit(:name, :page, :group => [:page_id])
end

返回的请求参数：

{"utf8"=>"✓", "_method"=>"patch",
"authenticity_token"=>"Cccccii383838=",
"group"=>{"page_id"=>"2"}, "commit"=>"Assign Page",
"action"=>"update", "controller"=>"groups", "id"=>"3"}

组has_one页面。页面has_one组。相关的ID位于每个模型上。

有什么想法？我把头撞到墙上是因为这可能是一个愚蠢的问题。

Answer 1

你尝试过这个吗？我认为问题出在

# MySQL.  Versions 4.1 and 5.0 are recommended.
# 
# Install the MYSQL driver
#   gem install mysql2
#
# Ensure the MySQL gem is defined in your Gemfile
#   gem 'mysql2'
#
# And be sure to use new-style password hashing:
#   http://dev.mysql.com/doc/refman/5.0/en/old-client.html

development:
  adapter: mysql2
  encoding: utf8
  reconnect: false
  database: mrdelivery_development
  pool: 5
  username: hd_user
  password: 
  host: localhost

# Warning: The database defined as "test" will be erased and
# re-generated from your development database when you run "rake".
# Do not set this db to the same as development or production.
test:
  adapter: mysql2
  encoding: utf8
  reconnect: false
  database: mrdelivery_test
  pool: 5
  username: hd_user
  password: 
  host: 127.0.0.1
  port: 3306

production:
  adapter: mysql2
  encoding: utf8
  reconnect: false
  database: mrdelivery_production
  pool: 5
  username: hd_user
  password: 
  host: localhost

方法

上

 group_params

Answer 2

<%= simple_form_for @group do |f| %>
    <%= f.input :page_id, 
        collection: @pages,
        selected: group.page,
        label: false
        %>
    <%= f.button :submit, "Assign Page" %>
<% end %>

groups_controller.rb

def update
  @group = Group.find(params[:id])
  @group.update_attributes(group_params)
  redirect_to groups_path, notice: "Did it"
end

def group_params
  params.require(:group).permit(:name, :page_id)
end

，您的关联应该是page has_one group和group belongs_to page

Answer 3

替换控制器中的强参数

Picasso.with(ctx).load(uri)
    .transform(new YourCropTransform(params...))
    .into(target)

Rails集合在表单中选择不保存

3 个答案: