How to get value from Javascript Input in Ruby Controller?

I currently have javascript in my view and it contains inputs so users
can input values

<input type = "text" name = "date8" id = "date8" value = "" size =25 >

I want to be able to access the value in this input once a method in my
controller is called. How can I do this? params[date8] does not work
which makes sense since it isnt a ruby textfield. Anyone have any ideas?
Thanks

It depends how you send that value to the controller.

If you use a form to submit data, then params[:date8] would work.

If you use a link, then you need to append the value to the link, like http://www.yourdomain.com/controller/method?date8=value

Thanks for the reply! I currently have a _form.html.erb file which
contains all the javascript/html. When I do params[:date8], I see that
there isn't anything in there. Just an empty string even though
something was typed into it.

check the logs to find out whether other params were passed to the controller or not. Is the input in inside the form? How do you use javascript on that input field?

Currently the javascript contains functions for a calendar app so users
do not have to insert the date manually

Here is some of the HTMl
<div>
<form name = "calendar1">
<input type = "text" name = "date1" id = "date1" value = "" size =25
readonly style = "border:0px;">
<A HREF = "#" onclick =
"cal.select(document.forms['calendar1'].date1,'anchor1','MM/dd/yyyy');return
false;" NAME = "anchor1" ID = "anchor1">select date</A>
</form>
</div>

The calendar app works fine, when I test it everything gets inserted
correctly into the entry field/input. Its trying to get the controller
to recognize the value of the input. Here is my controller.
def create
con = Mysql.new 'xx.xx.x.x','xxxx','xxxx', 'worksheet'
date1 = params[:date1]
rs = con.query 'INSERT INTO test VALUES ("'+date1.to_s+'")'
end
I know the method is called and everything is linked because the
database has new entries in it. However, I only see an empty string with
nothing in it.

Is it possible to pass in the value of date1 into the method when the
button is pressed? That way I wont have to find a way to reference
everything in the controller. If so I can I change my button_to to
reflect that?

<div>
<%= button_to "Create", action:"create"%>
</div>

Please not.

You can either append the value to the url or put the value inside the form.

You can check whether the date1 was posted to the server. Use web inspector to see the posted data. If the date1 was not even included in the posted data, then you need to check your html and javascript. Or if the date1 was included but it is blank, then you need to figure out why it is blank.

Currently the javascript contains functions for a calendar app so users
do not have to insert the date manually

Here is some of the HTMl
<div>
<form name = "calendar1">
<input type = "text" name = "date1" id = "date1" value = "" size =25
readonly style = "border:0px;">
<A HREF = "#" onclick =
"cal.select(document.forms['calendar1'].date1,'anchor1','MM/dd/yyyy');return
false;" NAME = "anchor1" ID = "anchor1">select date</A>
</form>
</div>

The calendar app works fine, when I test it everything gets inserted
correctly into the entry field/input. Its trying to get the controller
to recognize the value of the input. Here is my controller.
def create
con = Mysql.new 'xx.xx.x.x','xxxx','xxxx', 'worksheet'
date1 = params[:date1]
rs = con.query 'INSERT INTO test VALUES ("'+date1.to_s+'")'
end
I know the method is called and everything is linked because the
database has new entries in it. However, I only see an empty string with
nothing in it.

Install the ruby debugger. Then insert the debugger to start at this point:

def create
con = Mysql.new 'xx.xx.x.x','xxxx','xxxx', 'worksheet'

debugger

date1 = params[:date1]
rs = con.query 'INSERT INTO test VALUES ("'+date1.to_s+'")'
end

Then, when the debugger starts up, check to see what params contains: