我是rails的新手,我有两个型号,一个在另一个型号上有一个外键。
我创建了一个控制器和定义的索引方法,它正常工作:
def index
@collections = Collection.all
render json: @collections
end
这是这样的:
[{ “ID”:1, “标题”:“集 A”, “book_id”:1, “created_at”: “2016-04-10T18:41:32.709Z”, “的updated_at”: “2016-04-10T18:41:32.709Z”}]
我想将book_id字段转换为书籍对象列表,如下所示:
[{“id”:1,“title”:“Collection A”,“books”:[{“book_id”:1,“title: “BOOK_TITLE”},], “created_at”: “2016-04-10T18:41:32.709Z”, “的updated_at”: “2016-04-10T18:41:32.709Z”}]
然后我尝试了:
def index
@collections = Collection.all
render :json => collections.as_json(
:include => { :book_title }
)
end
但是在给我语法错误,我无法在此文档http://guides.rubyonrails.org/layouts_and_rendering.html
我正在使用Rails 4.1.0
答案 0 :(得分:2)
尝试:
def index
@collections = Collection.all
render :json => @collections.as_json(
:include => :book
)
end
或者如果您只想要:id和:title:
def index
@collections = Collection.all
render :json => @collections.as_json(
:include => {:book => {:only => [:id, :title]}}
)
end