Hi,
This is my rHtml page & Corresponding actions & model pages:-
===listform.rHtml=================
Products List
<%= start_form_tag(:action => "add_to_cart")%>
<%
i=0
%>
|
Product No.
|
Unit Price
|
Available Qty.
|
Demand Qty.
|
<% for product in @products %>
|
<%=hidden_field 'product','product_id'+i.to_s, :value=>product.id%>
<%=product.name%>
|
<%=product.unit_price%>
|
<%=product.quantity%>
|
<%=text_field("product", "dem_quantity"+i.to_s, "size" => 20)%>
|
<%
i=i+1
%>
<% end%>
<%=hidden_field 'product','count', :value=>i.to_i-1%>
|
<%= submit_tag("Add to Cart") %>
|
<%= end_form_tag %>
==================================
======products_controller.rb=======
def add_to_cart
count=params[:product][:count]
while count.to_i>=0.to_i
@product = Product.find(params[:product]['product_id'+count.to_s])
print "pppp" + params[:product]['dem_quantity'+count.to_s]
if params[:product]['dem_quantity'+count.to_s]==""
print @product.name
else
if @product.update_attributes(params[:product])
flash[:notice] = 'Product was successfully updated.'
redirect_to :action => 'listform'
else
render :action => 'edit'
end
end
count=count.to_i-1
end
===================================
=======Product.rb==================
class Product < ActiveRecord::Base
validates_presence_of :name , :demand
end
===================================
But when I click ‘add to cart’ button on my form I get error as:-
undefined method `product_id2=’ for #Product:0x3c98b30
Why this error is coming?
Please tell me.
Thanx in advance.
Prash
Prashant T. wrote:
Hi,
This is my rHtml page & Corresponding actions & model pages:-
===listform.rHtml=================
Products List
<%= start_form_tag(:action => "add_to_cart")%>
<%
i=0
%>
|
Product No.
|
Unit Price
|
Available Qty.
|
Demand Qty.
|
<% for product in @products %>
|
<%=hidden_field 'product','product_id'+i.to_s, :value=>product.id%>
<%=product.name%>
|
<%=product.unit_price%>
|
<%=product.quantity%>
|
<%=text_field("product", "dem_quantity"+i.to_s, "size" => 20)%>
|
<%
i=i+1
%>
<% end%>
<%=hidden_field 'product','count', :value=>i.to_i-1%>
|
<%= submit_tag("Add to Cart") %>
|
<%= end_form_tag %>
==================================
======products_controller.rb=======
def add_to_cart
count=params[:product][:count]
while count.to_i>=0.to_i
@product = Product.find(params[:product]['product_id'+count.to_s])
print "pppp" + params[:product]['dem_quantity'+count.to_s]
if params[:product]['dem_quantity'+count.to_s]==""
print @product.name
else
if @product.update_attributes(params[:product])
flash[:notice] = 'Product was successfully updated.'
redirect_to :action => 'listform'
else
render :action => 'edit'
end
end
count=count.to_i-1
end
===================================
=======Product.rb==================
class Product < ActiveRecord::Base
validates_presence_of :name , :demand
end
===================================
But when I click ‘add to cart’ button on my form I get error as:-
undefined method `product_id2=’ for #Product:0x3c98b30
Why this error is coming?
Please tell me.
Thanx in advance.
Prash
Hi,
I think this is because of
“@product.update_attributes(params[:product])” - your params contain
field labels like “product_id2” which are not fields in your model, so
you cannot update it like that. You coul use “update_attributes” passing
the hash with correct attribute names and values from your params.
Also, have a look at the “index” option in form helpers, this might help
you make your code more tidy - from the api:
====
If the helper is being used to generate a repetitive sequence of similar
form elements, for example in a partial used by
render_collection_of_partials, the “index” option may come in handy.
Example:
<%= text_field “person”, “name”, “index” => 1 %>
becomes
–
Agnieszka