我的模型很少 - 用户,教师和 TeacherLeader 。
class User < ActiveRecord::Base
attr_accessor :password
attr_accessible :user_login,
:password,
:teacher_attributes,
:teacher_leader_attributes
has_one :teacher
has_one :teacher_leader
accepts_nested_attributes_for :teacher_leader
end
class Teacher < ActiveRecord::Base
belongs_to :user
has_one :teacher_leader
end
class TeacherLeader < ActiveRecord::Base
belongs_to :user
belongs_to :teacher
end
我想通过嵌套属性在 TeacherLeader 中保存数据。因此,在用户模型中,我添加了accepts_nested_attributes_for :teacher_leader
和attr_accessible :teacher_leader_attributes
。
我也有控制器:
class TeacherLeadersController < ApplicationController
def new
...
@user = User.new
@teacher_leader = @user.build_teacher_leader
@teachers_collection = Teacher.all
.collect do |t|
[ "#{t.teacher_last_name} #{t.teacher_first_name} #{t.teacher_middle_name}", t.id ]
end
@choosen_teacher = @teachers_collection.first.last unless @teachers_collection.empty?
end
def create
user = User.new( params )
user.user_role = "class_head"
if user.save
flash[:success] = "Successfully created class head!"
else
flash[:error] = user.errors.full_messages
end
end
end
此外,我还可以查看 TeacherLeader 控制器( new.html.erb ):
<%= form_for @user, :url => teacher_leaders_url, :html => {:class => "form-horizontal"} do |f| %>
<%= field_set_tag do %>
<%= f.fields_for :teacher_leader do |tl| %>
<div class="control-group">
<%= tl.label :teacher_id, "Teacher names", :class => "control-label" %>
<div class="controls">
<%= select_tag( :teacher_id,
options_for_select( @teachers_collection, @choosen_teacher )) %>
</div>
</div>
<% end %>
<div class="control-group">
<%= f.label :user_login, "Login", :class => "control-label" %>
<div class="controls">
<%= f.text_field :user_login %>
</div>
</div>
<div class="control-group">
<%= f.label :password, "Pass", :class => "control-label" %>
<div class="controls">
<%= f.text_field :password %>
</div>
</div>
<% end %>
<%= f.submit "Create", :class => "btn btn-large btn-success" %>
当我试图保存我的模型时,我会收到奇怪的错误,例如“用户登录不能为空”等。我知道用户模型的验证会生成它们(我不知道为什么,即使在 params 中有值,我也会遇到这样的错误)。我想,我做错了,因为提交后我有 params :
teacher_id: '1'
user: !ruby/hash:ActiveSupport::HashWithIndifferentAccess
user_login: schoolh_1rF32
password: txaqxuTXz96auhX
commit: Create
action: create
controller: teacher_leaders
但我应该有这样的事情:
user: !ruby/hash:ActiveSupport::HashWithIndifferentAccess
user_login: schoolh_1rF32
password: txaqxuTXz96auhX
teacher_leader_attributes:
teacher_id: '1'
有什么问题?我能解决这个问题吗?
UPD :类头创建页面的HTML代码:
<form accept-charset="UTF-8" action="http://0.0.0.0:3000/teacher_leaders" class="form-horizontal" id="new_user" method="post"><div style="margin:0;padding:0;display:inline"><input name="utf8" type="hidden" value="✓" /><input name="authenticity_token" type="hidden" value="ZKlDTKG8SU8fZuMrUfQoCOSGknOhj651DT2LJDrfliA=" /></div>
<fieldset>
<div class="control-group">
<label class="control-label" for="user_teacher_leader_attributes_teacher_id">Teacher names</label>
<div class="controls">
<select id="teacher_id" name="teacher_id">
<option value="1" selected="selected">Jack P. Tompson </option>
<option value="2">Ronald V. Herwud</option>
</div>
</div>
<div class="control-group">
<label class="control-label" for="user_user_login">Login</label>
<div class="controls">
<input id="user_user_login" name="user[user_login]" size="30" type="text" />
</div>
</div>
<div class="control-group">
<label class="control-label" for="user_password">Password</label>
<div class="controls">
<input id="user_password" name="user[password]" size="30" type="text" />
</div>
</div>
</fieldset>
<input class="btn btn-large btn-success" name="commit" type="submit" value="Create" />
</form>
答案 0 :(得分:1)
你不需要
<%= select_tag( :teacher_id,
options_for_select( @teachers_collection, @choosen_teacher )) %>
但是类似
<%= tl.select( :teacher_id,
options_for_select( @teachers_collection, @choosen_teacher )) %>