Multiple checkboxes

Rails
1

Please could someone suggest what might be wrong here. In my view I’m
displaying a series of check boxes and when the form is submitted I want
the controller to iterate over the values and contatenate them all into
a string “1” if the box was checked and “0” if it wasn’t.
I’m new to Ruby and Rails and I can’t seem to get any values out of my
params other than “0”,

Here’s my code:

View:

<%= form_tag :action=>‘save_question’%>

<%= @question.title %>

<% for option in @options %> <%= option.option_text %> <% end %> <%= submit_tag%> <%= end_form_tag%>

Controller:

def save_question

@options = Option.find_all_by_question_id(session[:question_id])
response = “”
for option in @options do
if params[:option][option.id]==“1”
response << “1”
else
response << “0”
end
end
end

2

I did something similar recently. Here is the code from my controller
that
pulled out the items that were checked and saved them:

obj_keys = []
params[:objective].each_key {|k| obj_keys.push( k ) if
@params[:objective][k].to_i == 1}
@course.objectives = Objective.find( obj_keys )

Aaron

3

Your problem is probably because of what you set “value” to be.

I think if you exam your params <%= debug params %> you will see that
the
option is returning the value that you are setting its ‘checked value’
to.

Secondly, if there were 15 check boxes, they are all named the same
thing,
so as far as my understanding goes, each checkbox will overwrite itself.

May I recommend this in your view?

<%= form_tag :action=>‘save_question’%>

<%= @question.title %>

<% for option in @options %> <%= option.option_text %> <% end %> <%= submit_tag%> <%= end_form_tag%>

Then your controller can do this…

@options = Option.find_all_by_question_id(session[:question_id])
response = “”
for option in @options do
response << params[:options][option.id.to_s]
end
end

Haven’t tested this code, but it should work.

-hampton.

4

Hampton wrote:

Your problem is probably because of what you set “value” to be.

I think if you exam your params <%= debug params %> you will see that
the
option is returning the value that you are setting its ‘checked value’
to.

Secondly, if there were 15 check boxes, they are all named the same
thing,
so as far as my understanding goes, each checkbox will overwrite itself.

May I recommend this in your view?

<%= form_tag :action=>‘save_question’%>

<%= @question.title %>

<% for option in @options %> <%= option.option_text %> <% end %> <%= submit_tag%> <%= end_form_tag%>

Then your controller can do this…

@options = Option.find_all_by_question_id(session[:question_id])
response = “”
for option in @options do
response << params[:options][option.id.to_s]
end
end

Haven’t tested this code, but it should work.

-hampton.

Thanks for that - I’ve got it working now. i took your suggestions, but
for some reason if a checkbox isn’t checked a value doesn’t get returned
so if I use the code

for option in @options do
response << params[:options][option.id.to_s]
end

I get a nil object error for unchecked checkboxes.

The actual code I got working is

for option in @options do
if params[:option][option.id.to_s]==“1”
response << params[:option][option.id.to_s]
else
response << “0”
end
end

and the view code worked just as you said.

5

Actually, I believe the helper works like this.

<%= option.option_text %>

That should return a 0 value if unchecked.

-hampton.