我正在开发一个使用一些继承结构的项目......基类是..
# /app/models/shape.rb
class Shape < ActiveRecord::Base
acts_as_superclass # https://github.com/mhuggins/multiple_table_inheritance
end
子类是......
# /app/models/circle.rb
class Circle < ActiveRecord::Base
inherits_from :shape
end
这是一个显示继承结构的图形。
对于这些模型,我尝试使用RABL gem创建API。以下是相关的控制器......
# /app/controllers/api/v1/base_controller.rb
class Api::V1::BaseController < InheritedResources::Base
load_and_authorize_resource
respond_to :json, except: [:new, :edit]
end
...
# /app/controllers/api/v1/shapes_controller.rb
class Api::V1::ShapesController < Api::V1::BaseController
actions :index
end
end
...
# /app/controllers/api/v1/circles_controller.rb
class Api::V1::CirclesController < Api::V1::BaseController
def index
@circles = Circle.all
end
def show
@circle = Circle.find(params[:id])
end
end
我按Railscast #322 of Ryan Bates中的建议创建了show
模板。它看起来像这样......
# /app/views/circles/show.json.rabl
object @circle
attributes :id
当我通过http://localhost:3000/api/v1/circles/1.json
请求圈子时,会显示以下错误消息...
缺少模板
缺少模板api / v1 / circles / show,api / v1 / base / show, inherited_resources / base / show,application / show with {:locale =&gt; [:en], :formats =&gt; [:html],:handlers =&gt; [:erb,:builder,:arb,:haml,:rabl]}。
如何设置模板以使用继承的资源?
我提出了以下观点。我还设法实现了模型的继承结构,以保持代码DRY。
# views/api/v1/shapes/index.json.rabl
collection @shapes
extends "api/v1/shapes/show"
...
# views/api/v1/shapes/show.json.rabl
object @place
attributes :id, :area, :circumference
...
# views/api/v1/circles/index.json.rabl
collection @circles
extends "api/v1/circles/show"
...
# views/api/v1/circles/show.json.rabl
object @circle
extends "api/v1/shapes/show"
attributes :radius
if action_name == "show"
attributes :shapes
end
这会为圈子(index
操作)输出所需的JSON:
# http://localhost:3000/api/v1/cirles.json
[
{
"id" : 1,
"area" : 20,
"circumference" : 13,
"radius" : 6
},
{
"id" : 2,
"area" : 10,
"circumference" : 4,
"radius: 3
}
]
但由于某种原因 输出关联的shapes
所有属性...
注意:Shape
模型上存在关联,我之前没有提到过。
# http://localhost:3000/api/v1/cirles/1.json
{
"id" : 1,
"area" : 20,
"circumference" : 13,
"radius" : 6,
"shapes" : [
{
"id" : 2,
"created_at" : "2013-02-09T12:50:33Z",
"updated_at" : "2013-02-09T12:50:33Z"
}
]
},
答案 0 :(得分:1)
根据您提供的数据,您将模板放在/app/views/circles
中。错误告诉您需要将它们放在/app/views/api/v1/circles
而不是我相信。
对于第二个问题,听起来你说每个圆圈都有相关的形状。在这种情况下,我相信以下内容应该为views/api/v1/circles/show.json.rabl
提供您想要的内容:
# views/api/v1/circles/show.json.rabl
object @circle
extends 'api/v1/shapes/show'
attributes :radius
child(:shapes) do
extends 'api/v1/shapes/show'
end