using radio buttons

rubyonrails-talk
1

Hi,

I am new to rails and so have a very basic question. I have defined a set of radio buttons in _form.html like this:

<%= radio_button_tag(:colour, "Blue") %> <%= label_tag(:colour_B, "Blue") %>

Now I want to read the value of the radio button. Eg: if the user chose "Blue", then I want to display the user's name in a table under the column Blue. I already defined the table in index.html and I have a model called usertable that I previously defined on the command line using:

rails generate scaffold usertable name:string colour:text

I don't know how to actually read in the value of radio button. Do I need to define it somehow in the def show block in the controller? ...

Thanks so much. Any help is appreciated!

cathy

2

you can always try this when you have that kind of problem:

In your controller:

def whatever

flash[:notice] = params

redirect_to back

end

this will print the params hash if you have a flash message div set up. The original way of doing this is by looking at the console, and looking at the hash that gets send.

Parameters: {“utf8”=>“✓”, “authenticity_token”=>“lol_omg”, “order_details”=>{“send_to”=>“my_house”, “product_id”=>“2”}}

usually in the controller you access this hash like this:

params[:order_detail]

where

params[:order_detail] is “order_details”=>{“send_to”=>“my_house”, “product_id”=>“2”} and params[:order_details] will return

{“send_to”=>“my_house”, “product_id”=>“2”}

so putting params into the flash will send back all the params and that will let you see what parameters and send and how to access them.

3

cathy n. wrote in post #1027986:

I am new to rails and so have a very basic question. I have defined a set of radio buttons in _form.html like this:

<%= radio_button_tag(:colour, "Blue") %> <%= label_tag(:colour_B, "Blue") %>

Now I want to read the value of the radio button. Eg: if the user chose "Blue", then I want to display the user's name in a table under the column Blue. I already defined the table in index.html and I have a model called usertable that I previously defined on the command line using:

Keep in mind that radio button need to be defined in a radio button group. Create the group by using the same value for the name attribute of each radio button in the group:

Example:

radio_button_tag 'gender', 'male' # => <input id="gender_male" name="gender" type="radio" value="male" />

radio_button_tag 'gender', 'female' # => <input id="gender_female" name="gender" type="radio" value="female" />

Notice the name of the two radio button are both "gender".

The result will appear on the params like:

{"utf8"=>"✓", "authenticity_token"=>"joHm5S13RnrNzaLv7t7HKU48SD6h6e5MRbwYwNU6nJA=", "gender"=>"female", "submit"=>"Create"}

params[:gender]