Problem while creating a new record

rubyonrails-talk
1

Hi experts I tried to save data in my Database in RoR but i could not do that.No Error occured but i had no success to save data.hier is my codes: in my Controller:

class VorlesungsController < ApplicationController   def new          @vr=Vorlesung.new   end

  def create     @vorlesung=Vorlesung.create(params[:vr])     if @vorlesung.save       flash[:notice]='ABC'       render :action => 'index'     else       flash[:notice]='DEF '       render :action => 'index'     end   end end

My View:

<%= form_for :vorlesung do |v| %>     Name : <%= v.text_field :Name %> <br>     Name de Professur : <%= v.text_field :Leiter_name %><br>     <%= v.submit 'Speicher'%>

<% end %>

i think that my Form_for is not in correct form because when i delete create function from the controller everythings is as before and when i changed :vorlesung in Form_for to @vr an error occured :                               NoMethodError in Vorlesungs#new Thank you for your help

2

Change that to: @vorlesung=Vorlesung.new

And see what effect that has.

3

Thank you Michael ,

I did it but everythings remains as before when i changed Form_for into   <%= form_for @vorlesung do |v| %> an error like this occured:    NoMethodError in Vorlesungs#new when Form_for remains as:   <%= form_for :vorlesung do |v| %> after clicking my submit button only the content of textboxes deleted and no other effect

4

Babak bsn wrote in post #1017477:

Thank you Michael ,

I did it but everythings remains as before when i changed Form_for into   <%= form_for @vorlesung do |v| %> an error like this occured:    NoMethodError in Vorlesungs#new when Form_for remains as:   <%= form_for :vorlesung do |v| %> after clicking my submit button only the content of textboxes deleted and no other effect

Post more of the error message, and any code in the error message.

5

NoMethodError in Vorlesungs#new

Showing /home/babak/Management/app/views/vorlesungs/new.erb where line #1 raised:

undefined method `vorlesungs_path' for #<#<Class:0xb6009cfc>:0xb6008f3c> Extracted source (around line #1):

1: <%= form_for @vorlesung do |v| %> 2: Name : <%= v.text_field :Name %> <br> 3: Name de Professur : <%= v.text_field :Leiter_name %><br> 4: <%= v.submit 'Speicher'%> Rails.root: /home/babak/Management

this error occured when my new.html.erb is: <%= form_for @vorlesung do |v| %>     Name : <%= v.text_field :Name %> <br>     Name de Professur : <%= v.text_field :Leiter_name %><br>     <%= v.submit 'Speicher'%>

<% end %>

and my controller is:

class VorlesungsController < ApplicationController   def new          @vorlesung=Vorlesung.new   end

def create     @vorlesung=Vorlesung.create(params[:vorlesung])     if @vorlesung.save        @status_message = 'Student inserted successfully.'     else       render 'new'     end   end end

6

i think that my Form_for is not in correct form because when i delete create function from the controller everythings is as before and when i changed :vorlesung in Form_for to @vr an error occured :

This looks wrong:

  def create      @vorlesung=Vorlesung.create(params[:vr])

What the hell is :vr?

What version of rails are you using? In rails 3, you would write:

<%= form_for(@vorlesung) do |v| %>

    Name : <%= v.text_field :name, "Name:" %> <br>

    Name de Professur : <%= v.text_field :leiter_name, "Leiter name:" %><br>

    <%= v.submit 'Speicher'%>

<% end %>

7

Babak bsn wrote in post #1017480:

NoMethodError in Vorlesungs#new

Showing /home/babak/Management/app/views/vorlesungs/new.erb where line #1 raised:

undefined method `vorlesungs_path' for #<#<Class:0xb6009cfc>:0xb6008f3c> Extracted source (around line #1):

I think that means you did not define the proper route in your config/routes.rb file. If you do this in your routes.rb file:

SampleApp::Application.routes.draw do

  resources :vorlesung

then rails defines a lot of what are called 'named routes' for you. Read this:

8

Thank you friends,that has been solved