Question

I have a nested model like this:

ProgramGuide
    |-channels
        |-channel
            |-programs

Now I want to get the very last ending program regardless of channels.

In the ProgramGuide model I have a method:

lastProgram : function(){
   //how to find last ending program?    
}

So, is there a good way to find the last ending program, maybe a way to flatten down the model tree for programs, or must I write a nested loop to achieve this?

Answer 1

do know that backbone depends on underscore, so you always have underscore methods available
i don’t have any exact code example, but i’m sure you don’t need to nest loops to run through your structure,

i bet you can use any of these underscore methods,

• underscore flatten possibly to flatten your structure (can get hard, because you get the normal model attributes with it, should need a workaround to only have the .toJSON() of each model
• underscore filter could be used to filter out the attributes itself only, or to filter the program list
• underscore sortBy could be used to sort on your air time, to get the last ending program
• underscore pluck could be used to pluck only the ID, name and ending time, to remove all the clutter in your structure

i will try to come up with an example, later today
but i can’t promise when i have time for it.