Question about collection_check_box

rubyonrails-talk
1

Hi there,

i want to use collection_check_boxes (in rails 4) but i am a little bit stuck... okay, first things first:

i have 2 models:

2

Hi there,

i want to use collection_check_boxes (in rails 4) but i am a little bit stuck... okay, first things first:

i have 2 models:

---------------- class Supervisioncategory < ActiveRecord::Base has_many :phonenotes end ----------------

and

---------------- class Phonenote < ActiveRecord::Base belongs_to :employee belongs_to :supervisioncategory belongs_to :trainingcategory end ----------------

and i want to use collection_check_box for the categories

---------------- <div class="field">    <%= f.label :supervision %><br>    <%= collection_check_boxes :phonenote, :supervision_ids, @supervisions, :id, :name %> </div> ----------------

shows all the categories i want, i can check them, i made the ":supervision_ids" accessible. But then... nothing happend? I think my problem is at the typ of the ":supervision_ids".. integer won't work, string won't work. So... can someone help me with this Problem?

View source as generated by Rails in your browser, and see what these checkboxes look like in HTML. That's where I would start debugging this. My guess is that you need these to be supervisioncategory_ids, since that's what the b/t is saying the model is named. But without looking at the HTML, we won't know if your checkboxes are properly named to post as an array back to your controller.

Walter

3

Here you go:

<div class="field">    <label for="phonenote_supervision">Supervision</label><br>    <input id="phonenote_supervision_ids_1" name="phonenote[supervision_ids]" value="1" type="checkbox">    <label for="phonenote_supervision_ids_1">TG</label>    <input id="phonenote_supervision_ids_2" name="phonenote[supervision_ids]" value="2" type="checkbox">    <label for="phonenote_supervision_ids_2">P</label>    <input id="phonenote_supervision_ids_3" name="phonenote[supervision_ids]" value="3" type="checkbox">    <label for="phonenote_supervision_ids_3">Fahrdienst</label>    <input name="phonenote[supervision_ids]" value="" type="hidden"> </div>

Regards

4

View source as generated by Rails in your browser, and see what these checkboxes look like in HTML. That's where I would start debugging this. My guess is that you need these to be supervisioncategory_ids, since that's what the b/t is saying the model is named. But without looking at the HTML, we won't know if your checkboxes are properly named to post as an array back to your controller. Walter

Here you go:

<div class="field"> <label for="phonenote_supervision">Supervision</label><br> <input id="phonenote_supervision_ids_1" name="phonenote[supervision_ids]" value="1" type="checkbox"> <label for="phonenote_supervision_ids_1">TG</label> <input id="phonenote_supervision_ids_2" name="phonenote[supervision_ids]" value="2" type="checkbox"> <label for="phonenote_supervision_ids_2">P</label> <input id="phonenote_supervision_ids_3" name="phonenote[supervision_ids]" value="3" type="checkbox"> <label for="phonenote_supervision_ids_3">Fahrdienst</label> <input name="phonenote[supervision_ids]" value="" type="hidden"> </div>

Regards

Okay, that looks right, as far as it goes. Now what happens in your console if you find a phonenote, and ask for its supervisions?

  p = Phonenote.first   p.supervisions

  # error, or array?

Walter

5

2.0.0-p353 :002 > p.supervisions NoMethodError: undefined method `supervisions' for #<Phonenote:0xb042698>

Ronny

6

2.0.0-p353 :002 > p.supervisions NoMethodError: undefined method `supervisions' for #<Phonenote:0xb042698>

2.0.0-p353 :003 > p.supervisioncategories NoMethodError: undefined method `supervisioncategories' for #<Phonenote:0xb042698>

2.0.0-p353 :004 > p.supervisioncategory_id   => nil 2.0.0-p353 :005 >