javascript - Backbone model save() method not doing anything -

i'm using backbone rails , trying save new model server. however, calling .save() on model doesn't seem doing anything. looking @ "network" tab in chrome, don't see request being made. here's code:

model

class myapp.models.chain extends backbone.model     defaults:         steps: []         id: null      urlroot: '/chains'      validate: (attrs) ->         if $.trim(attrs.steps[@step_number - 1]) == ''             return "step can't blank." 

view

class myapp.views.chainsnew extends backbone.view      # @template defined conditional inside render()     initialize: ->         @is_saving = false      events:         'click #btn-go': 'add_step'         'click #btn-done': 'save'      render: (step_number) ->         @model.step_number = step_number          @template = if @model.step_number 1 jst['chains/new'] else jst['chains/step']         $(@el).html(@template({previous_step_text: @model.get('steps')[step_number - 2]}))          @      add_step: ->         #divide array arrays of steps before , after step being edited         steps = @model.get('steps')         array1 = steps.slice(0, @step_number - 1)         array2 = steps.slice(@step_number)         array1.push(@$el.find('textarea').val())         newarray = array2.concat(array1)          if !@model.set({steps: newarray}, {validate: true})             alert(@model.validationerror)             false         else             true #need return value `save` method      save: ->         @is_saving = true         if @add_step             @model.save(null, {                 success: ->                     console.log(arguments)                  error: ->                     console.log(arguments)             }) 

i know @model.save being called because have logged message right before console (in other words if @add_step true).

most likely, model failing validation, makes save return false , make no api call. try with

class myapp.models.chain extends backbone.model     defaults:         steps: []         id: null      urlroot: '/chains'      validate: (attrs) ->         if $.trim(attrs.steps[@step_number - 1]) == ''             console.log "houston, have problem"             return "step can't blank." 

if see message in console, there's issue. can try comment validatefunction, , api call should made in circumstances.