它可能看起来很长但不要害怕;） 我的会话控制器中的创建功能存在一些问题。这是因为从其他模型中使用具有强参数的新Rails 4，实际上可以将其视为孩子。目前代码正在运行，但我不确定是否正确使用了强参数。那么让我们来看看代码：
以下是 ConversationMessage 模型
class ConversationMessage < ActiveRecord::Base
# def change
# create_table :conversation_messages do |t|
# t.integer :message_id
# t.integer :conversation_id
# end
# end
belongs_to :message, class_name: 'Message', foreign_key: :message_id
belongs_to :conversation, class_name: 'Conversation', foreign_key: :conversation_id
end
这是 MessageGroupMessage 模型
class MessageGroupMessage < ActiveRecord::Base
# def change
# create_table :message_group_messages do |t|
# t.integer :user_id
# t.integer :message_id
# t.integer :message_group_id
# end
# end
belongs_to :user, class_name: 'User', foreign_key: :user_id
belongs_to :message, class_name: 'Message', foreign_key: :message_id
belongs_to :message_group, class_name: 'MessageGroup', foreign_key: :message_group_id
end
这是 MessageGroup 模型
class MessageGroup < ActiveRecord::Base
# def change
# create_table :message_groups do |t|
# t.integer :id_user
# t.string :message_group_name
# t.timestamps
# end
# add_index :message_groups, :id_user
# end
belongs_to :user, class_name: 'User', foreign_key: :id_user
has_and_belongs_to_many :messages, :join_table => "message_group_messages", class_name: "Message"
has_many :message_group_messages, class_name: "MessageGroupMessage"
end
这是 BodyMessage 模型
class BodyMessage < ActiveRecord::Base
# def change
# create_table :body_messages do |t|
# t.integer :message_id
# t.text :body
# t.timestamps
# end
# add_index :body_messages, :message_id
# end
belongs_to :message, class_name: 'Message', foreign_key: :message_id
end
这是消息模型
class Message < ActiveRecord::Base
# def change
# create_table :messages do |t|
# t.integer :id_sender
# t.integer :id_receiver
# t.timestamps
# end
# end
belongs_to :sender, class_name: 'User', foreign_key: :id_sender
belongs_to :receiver, class_name: 'User', foreign_key: :id_receiver
has_one :conversation_message, class_name: "ConversationMessage"
has_one :conversation, through: :conversation_message, source: :conversation
has_and_belongs_to_many :message_groups, :join_table => "message_group_messages", class_name: "MessageGroup"
has_many :message_group_messages, class_name: "MessageGroupMessage"
has_one :body_message, class_name: "BodyMessage"
end
这是 FoldersConversation 模型
class FoldersConversation < ActiveRecord::Base
# def change
# create_table :folders_conversations do |t|
# t.integer :conversations_folder_id
# t.integer :conversation_id
# end
# end
belongs_to :conversation, class_name: 'Conversation', foreign_key: :conversation_id
belongs_to :conversations_folder, class_name: 'ConversationsFolder', foreign_key: :conversations_folder_id
end
这是 ConversationsFolder 模型
class ConversationsFolder < ActiveRecord::Base
# def change
# create_table :conversations_folders do |t|
# t.integer :user_id
# t.string :folder_name
# t.timestamps
# end
# add_index :conversations_folders, :user_id
# end
belongs_to :user, class_name: 'User', foreign_key: :user_id
has_and_belongs_to_many :conversations, :join_table => "folders_conversations", class_name: "Conversation"
has_many :folders_conversations, class_name: 'FoldersConversation'
end
以下是对话模型，其中包含将成为“ childs ”所有其他类的视图
class Conversation < ActiveRecord::Base
# create_table :conversations do |t|
# t.integer :sender_id
# t.integer :receiver_id
# t.string :subject
# t.timestamps
# end
belongs_to :sender, class_name: 'User', foreign_key: :sender_id
belongs_to :receiver, class_name: 'User', foreign_key: :receiver_id
has_and_belongs_to_many :conversations_folders, :join_table => "folders_conversations", class_name: "ConversationsFolder"
has_many :folders_conversations, class_name: 'FoldersConversation'
has_many :message_group_messages, through: :messages, source: :message_group_messages
has_many :message_groups, through: :messages, source: :message_groups
has_and_belongs_to_many :messages, :join_table => "conversation_messages", class_name: "Message"
accepts_nested_attributes_for :messages, allow_destroy: true
has_many :body_messages, through: :messages, source: :body_message
accepts_nested_attributes_for :body_messages, allow_destroy: true
has_many :conversation_messages, class_name: "ConversationMessage"
accepts_nested_attributes_for :conversation_messages, allow_destroy: true
end
这是对话控制器
class ConversationsController < ApplicationController
def create
### GET FROM VIEW -> HERE WHERE THE STRONG PARAMS SHOULD BE WORKING FOR: subject AND body
@friend = User.friendly.find(params[:id_friend])
@subject = params[:conversation][:conversation_attributes][:subject]
@body = params[:conversation][:body_messages]
@conversation_new = Conversation.new(conversation_params)
@conversation = @conversation_new.create_new_conversation(current_user, @friend, @subject)
@message_new = Message.new(message_params)
@message = @message_new.message_new(current_user, @friend)
@body_message_new = BodyMessage.new(body_message_params)
@body_message = @body_message_new.body_message_new(@message, @body)
@conversation_message_new = ConversationMessage.new(conversation_message_params)
@conversation_message = @conversation_message_new.conversation_message_new(@conversation, @message)
folders_conversation = @conversation.add_new_to_folders_conversation(current_user,@friend)
respond_to do |format|
format.html { redirect_to conversations_url }
format.js
end
end
private
###
### HERE ARE THE STRONG PARAMS
###
def conversation_params
params.require(:conversation).permit(:subject)
end
### THESE ARE THE ONES THAT ARE WORKING BUT FOR SURE NOT BY THE CORRECT WAY
def message_params
params.require(:conversation).permit(messages_attributes: [:id_receiver])
end
def body_message_params
params.require(:conversation).permit(body_messages_attributes: [:message_id, :body])
end
def conversation_message_params
params.require(:conversation).permit(conversation_messages_attributes: [:message_id])
end
end
end
所有信息都通过 form_for 发送给控制器。以下是对话
中的创建视图<%= form_for(@conversation, url: url_for(controller: 'conversations', action: 'create'), remote: true) do |f| %>
SELECT FRIEND
<%= select_tag :id_friend, options_for_select(@friends.collect{|u| [u.name, u.name]}, {include_blank: 'Select Friend'} ) %>
<%= f.fields_for :conversation_attributes do |s| %>
<%= s.label :subject %>
<%= s.text_field :subject %>
<% end %>
TITLE TEXT
<%= f.text_area(:body_messages, cols: 20, rows: 20, value: "") %>
<%= f.submit "Send", class: "btn btn-large btn-primary" %>
<%= f.submit "Save in Draft", class: "btn btn-large btn-primary" %>
<% end %>
肯定是我看不到的东西，它让我的脑袋旋转而没有找到它为什么不起作用。如果我们找到解决方案，它也可以帮助许多人在强参数时遇到同样的问题
答案 0 :(得分：0)
这看起来很复杂，我首先将它简化为处理1 nested_attribute设置为启动
你需要建立像这样的强大的障碍
def conversation_params
message_attributes = {
messages_attributes: [:id_receiver]
}
body_message_attributes = {
body_messages_attributes: [:message_id, :body]
}
conversation_messages_attributes = {
conversation_messages_attributes: [:message_id]
}
params.require(:conversation).permit(:subject
message_attributes,
body_message_attributes,
conversation_messages_attributes
)
end
此外，在您的forms_for @conversation中，您不需要将fields_for置于has_many之下，您可以将关联的fields_for个对象置于<%= form_for(@conversation, url: url_for(controller: 'conversations', action: 'create'), remote: true) do |f| %>
<%= f.text_field :subject %>
<%= f.fields_for :body_messages do |s| %>
<%= s.text_area(:body, cols: 20, rows: 20, value: "") %>
<% end %>
# ...
{{1}}
查看指南了解更多内容：http://guides.rubyonrails.org/form_helpers.html#building-complex-forms