我在使用我的 REST API 保存模型时遇到问题。我有一个包含许多任务和一个客户关联的卡片模型：
class Card < ActiveRecord::Base
belongs_to :customer
has_many :card_tasks
has_many :tasks, :through => :card_tasks
accepts_nested_attributes_for :tasks
accepts_nested_attributes_for :card_tasks
accepts_nested_attributes_for :customer
end
class CardTask < ActiveRecord::Base
belongs_to :task
belongs_to :card
accepts_nested_attributes_for :task
accepts_nested_attributes_for :card
end
class Task < ActiveRecord::Base
has_many :cards, :through => :card_tasks
has_many :card_tasks
end
当我发送这样的json时：
{
"card" = > {
"miscellaneous" = > "Obervations diverses",
"heater" = > "0",
"water_quality" = > "",
"customer" = > {
"id" = > "2", "house_name" = > "house_name2", "city" = > "city_2", "lastname" = > "lastname2", "sci" = > "sci2", "postal_code" = > "potal_code_2", "address_line_1" = > "address_line_2", "updated_at" = > "2012-03-05 18:20:57 +0000", "created_at" = > "2012-03-05 18:20:54 +0000", "firstname" = > "firstname2", "address_line_2" = > "address_line_3", "water_used" = > "0"
},
"tasks" = > [
{
"title" = > "Nettoyage ligne eau", "id" = > "6", "updated_at" = > "2012-02-17 08:40:47 +0000", "created_at" = > "2012-02-17 08:40:47 +0000"
},
{
"title" = > "Surveillance", "id" = > "4", "updated_at" = > "2012-02-17 08:40:47 +0000", "created_at" = > "2012-02-17 08:40:47 +0000"
}
]
}
}
我的创建动作：
def create
card = Card.new(params[:card])
if (card.save)
respond_with({ :card => card} , :location => nil, status: :created) and return
end
respond_with({ :errors => card.errors }, :location => nil, status: :unprocessable_entity) and return
end
这样做时，我得到了一个：
ActiveRecord::AssociationTypeMismatch (Task(#70249431354580) expected, got ActiveSupport::HashWithIndifferentAccess(#70249421573300)):
app/controllers/cards_controller.rb:14:in `new'
app/controllers/cards_controller.rb:14:in `create'
我做错什么了？