updating single column with form

[downtroden]

I can't seem to find a tutorial on how to do this.

Here's what i have in my controller

  def update_lang_pref
    @language = Person.find(session[:user])
 
    if @language.update_attributes(:lang_pref)
      redirect_to request.env['HTTP_REFERER']
  end

and i'm getting an error "can't dup Symbol". Parameters is reading "lang_pref"=>"1"


what am i doing wrong? Any help is appreciated.

[Mittineague]

I'm still too new to know what the problem is. But I found this in a tutorial's file.

  def update
    @forum = Forum.find(params[:id])
 
    respond_to do |format|
      if @forum.update_attributes(params[:forum])
        flash[:notice] = 'Forum was successfully updated.'
        format.html { redirect_to(@forum) }
        format.xml  { head :ok }
      else
        format.html { render :action => "edit" }
        format.xml  { render :xml => @forum.errors, :status => :unprocessable_entity }
      end
    end
  end

The differences I see are that the second symbol is inside a sub and the use of "params".

[downtroden]

here's the solution i ended up finding... good ol' update_ATTRIBUTE

if @language.update_attribute('lang_pref',params[:lang_pref])
   blah, blah, blah    
end

so apparently there's some contention out there because it doesn't validate, BUT because i'm trying to change a single integer from radio buttons, i'm not to worried about validation at the moment.

[ReggieB]

If you use the plural update_attributes and pass in a hash, it will validate:

@language.update_attributes({:lang_pref => params[:lang_pref]})

[downtroden]

If you use the plural update_attributes and pass in a hash, it will validate:

@language.update_attributes({:lang_pref => params[:lang_pref]})

nope... didn't work for me.

thanks though.