ruby on rails - Link in Nested Forms returning Invalid Association -


i'm using nested forms create complex list of forms group of models associated it. however, when add link_to_add link in form returns error message,

invalid association. make sure accepts_nested_attributes_for used :workout_exercises association.

if remove link works fine. have assume it's view error since removing causes no issues , imagine bring issue if associations or accepted nested forms wasn't working. what's wrong code , how fix it.

= nested_form_for(@client_workout) |f|    = f.number_field :client_id, placeholder: "client's name"    = f.text_field :description, placeholder: "description"    = f.text_field :note, placeholder: "notes"    = f.fields_for :workouts |workout_form|     = workout_form.text_field :name, placeholder: "workout name"      = workout_form.fields_for :workout_exercises |exercise_details_form|       div create exercise        = exercise_details_form.fields_for :exercise |exercise_form|         = exercise_form.text_field :name, placeholder: "exercise name"        = exercise_details_form.text_field :reps, placeholder: "reps"        = exercise_details_form.text_field :sets, placeholder: "sets"        = exercise_details_form.text_field :weight, placeholder: "weight"        = exercise_details_form.text_field :category, placeholder: "category"        = exercise_details_form.link_to_remove "remove exercise", class: "btn btn-danger"      / line of code below causing problem     = workout_form.link_to_add "add exercise", :workout_exercises    = f.submit class: "btn btn-success"

my client_workout model

class clientworkout < activerecord::base   attr_accessible :workout_id, :description, :note    belongs_to :workout    accepts_nested_attributes_for :workout end

you should invert because workout has many workout_clients

= nested_form_for(@workout) |f|

and

= f.fields_for :client_workouts |clientworkout_form|

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