我正在嘗試使用accept_nested_attributes在窗體中設置對象的字段。然而,當我這樣做的控制器:未知屬性X,但X不在rails3中update_attributes的參數
@device.update_attributes(params[:device])
我得到:
ActiveRecord::UnknownAttributeError
"unknown attribute: device_id"
但DEVICE_ID,這是其他非相關模型的屬性,不包括在PARAMS。 參數如下。
{"utf8"=>"✓",
"authenticity_token"=>"Xja5GCNRutpZn2c4wKeSx0KO6sNEzh09kWmPQ0/0Hys=",
"id"=>"5",
"device"=>{"routes_attributes"=>{"0"=>{"name"=>"",
"origin_attributes"=>{"name"=>"",
"lat"=>"",
"lng"=>""},
"destination_attributes"=>{"name"=>"",
"lat"=>"",
"lng"=>""}}}},
"commit"=>"Create Device"}
什麼可以被認爲是一個原因。 這是我的代碼。
視圖
<%= form_for @device, :url => {:action => "do_compose"}, :method => :post do |f| %>
<div class="field">
<%= select_tag(:id, options_for_select(Device.all.collect{|d| [d.name + "/" + d.get_driver().name, d.id] }),:prompt=>"select a device") %>
</div>
<div class="field">
<%= render partial:"routes/nested_routes_form", locals: {route_object:@device.get_route(), parent_form:f} %>
</div>
<div class="actions">
<%= f.submit %>
</div>
<% end %>
控制器
def do_compose
@device = Device.find(params[:id])
respond_to do |format|
if @device.update_attributes(params[:device])
format.html { redirect_to @device, notice: 'Device was successfully updated.' }
else
format.html { render action: comopse }
end
end
end
模型
class Route < ActiveRecord::Base
attr_accessible :name, :destination_attributes, :origin_attributes, :waypoints, :driver_id
has_many :waypoints
has_one :origin, :class_name=>"Origin"
has_one :destination, :class_name=>"Destination"
belongs_to :device
accepts_nested_attributes_for :origin, :destination, :waypoints
end
class Device < ActiveRecord::Base
attr_accessible :id, :name, :password
attr_accessible :device_driver_bind_attributes, :drivers_attributes, :routes_attributes, :current_location_attributes
has_many :drivers, through: :device_driver_bind
has_many :device_driver_bind, dependent: :destroy
has_one :current_location, :class_name => "CurrentLocation"
has_many :routes
has_many :origins, through: :routes
has_many :destinations, through: :routes
has_many :waypoints, through: :routes
accepts_nested_attributes_for :routes, :current_location, :device_driver_bind
end
您可能需要檢查路由器是否缺少:device_id列。 AR期望能夠使用'acceptersted_attributes_for:routes'來設置它,以滿足'belongs_to:device' – CMW
就是這樣!這樣一個容易的錯誤..非常感謝你! – Ryo
我會把它變成一個完整的答案,然後你可以把它標記爲已解決。 – CMW