Rails - Jul 2006 - error_messages_for

I can''t seem to figure out how to validate a few fields  some1 please 
help me out

model---------
class Record < ActiveRecord::Base
  validates_presence_of :sw, :flex
end

controller------------
class RecordController < A;;icationController
  def new
      @record = Rrecord.new
      @product = Product.find(params[''product_id''])
  end

  def create
      @Record.new(params[''record''])
      if @record.valid?
          @record.save
          redirect_to :action => ''show'', :id =
@record.product_id
      else
          render_action ''new''
      end
   end
end

view--------------
<%= error_messages_for ''Record'' %>

<form action ="../record/create" method = "post">
<input id = "record_product_id" name =
"record[product_id]"
type="hidden" value ="<% @product.id %>" />

<input id="record_sw" name = "record[sw]",size =
"40" type= "text" value
=" " />
<input id="record_flex" name = "record[flex]",size =
"40" type= "text"
value =" " />

<input type = "submit" value = "create" />
</form>


Now i know the record will save and be created just fine w/out checking 
''@record.valid?'', but when i do check, it fails (if the field
is blank)
and the render_action ''new'' complains that it is looking for
the
"product_id", which i understand because it is looking for it in the 
controller.  Why won''t this work, i''ve spent well more time
than
allocated on such a small matter, please help!!!



-- 
Posted via http://www.ruby-forum.com/.

On 7/13/06, Yngwie <mdalsant@gmail.com> wrote:
>
> I can''t seem to figure out how to validate a few fields  some1
please
> help me out
>
> model---------
> class Record < ActiveRecord::Base
>   validates_presence_of :sw, :flex
> end
>
> controller------------
> class RecordController < A;;icationController
>   def new
>       @record = Rrecord.new
>       @product = Product.find(params[''product_id''])
>   end
>
>   def create

  This line should read
@record = Record.new(params[:record])

      @Record.new(params[''record''])
>       if @record.valid?
>           @record.save
>           redirect_to :action => ''show'', :id =
@record.product_id
>       else
>           render_action ''new''
>       end
>    end
> end
>
> view--------------

The error_messages for looks for an instance variable with the same name as
the string provided.

eg
<%= error_messages_for "record" %> #=> looks for @record and
displays errors
<%= error_messages_for "my_object" %> #=> looks for
@my_object and displays
errors

Also in your controller your calling for params[:product_id] which, from
your view I''m guessing is not present.

See the name attribute of your hidden field.  record[product_id]  This is
what is submitted back to your controller.

you should have
@product = Product.find(params[:record][:product_id])

<%= error_messages_for ''Record''
%>
>
> <form action ="../record/create" method = "post">
> <input id = "record_product_id" name =
"record[product_id]"
> type="hidden" value ="<% @product.id %>" />
>
> <input id="record_sw" name = "record[sw]",size =
"40" type= "text" value
> =" " />
> <input id="record_flex" name = "record[flex]",size =
"40" type= "text"
> value =" " />
>
> <input type = "submit" value = "create" />
> </form>
>
>
> Now i know the record will save and be created just fine w/out checking
> ''@record.valid?'', but when i do check, it fails (if the
field is blank)

When the save call is made, the object is checked for validity anyway.  You
can use something like
if @object.save
  redirect_to ....
....
If it''s not valid, it won''t save

and the render_action ''new'' complains that it is looking for
the
> "product_id", which i understand because it is looking for it in
the
> controller.  Why won''t this work, i''ve spent well more
time than
> allocated on such a small matter, please help!!!

See above for product_id parameter




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