In a rails app I have an action that returns a json representation of a collection of different models. It looks something like this:
在rails应用程序中，我有一个动作，返回不同模型集合的json表示。它看起来像这样：
respond_to :json
def index
@cars = Car.all
@vans = Van.all
respond_with({
:cars => @cars,
:vans => @vans
})
end
However, I want to customise the attributes and methods that are passed to the json object. A bit like:
但是，我想自定义传递给json对象的属性和方法。有一点像：
respond_with({
:cars => @cars.to_json(:only => [:make, :model], :methods => [:full_name]),
:vans => @vans
})
Doing the above, causes the json representation of the "cars" to be escaped as one big string, like:
执行上述操作后，会将“cars”的json表示转义为一个大字符串，如：
{
"cars":"[{\"car\":{\"make\":\"Ford\" ... etc
"vans": [{"van":{"make":"Citreon" ... vans not escaped
}
Obviously I'm approaching this the wrong way. Can anyone point me in the right direction?
显然我正以错误的方式接近这一点。谁能指出我正确的方向？
1 个解决方案
#1
12
Since you're nesting the to_json in another Hash, I think you need to use as_json (which returns a Hash instead of a String) instead:
由于你将to_json嵌套在另一个Hash中，我认为你需要使用as_json（它返回一个Hash而不是一个String）：
respond_with({
:cars => @cars.as_json(:only => [:make, :model], :methods => [:full_name]),
:vans => @vans
})
#1
12
Since you're nesting the to_json in another Hash, I think you need to use as_json (which returns a Hash instead of a String) instead:
由于你将to_json嵌套在另一个Hash中，我认为你需要使用as_json（它返回一个Hash而不是一个String）：
respond_with({
:cars => @cars.as_json(:only => [:make, :model], :methods => [:full_name]),
:vans => @vans
})