Rails 'stringify_keys'

Question

(sorry for my english)

I'm trying my first rails web app. Here is my code:

Model:

class Movie < ActiveRecord::Base    

   attr_accessible :about, :title, :url

end

Controller:

class MoviesController < ApplicationController

  def show

    @movie = Movie.find(params[:id])

  end

  def update

    @mov = Movie.find(params[:id])

    if @mov.update_attributes(params[:id])

        redirect_to movies_path, :notice => "Your movie has been updated."

    else

        render "show"

    end  
  end


  def destroy

  end

end

and the View

    <%= form_for @movie do |m| %>
<center>
  <table>
    <td valign='middle' align='right'>
      Title:
    </td>
    <td>
      <%= m.text_field :title %>
    </td>
<tr>
    <td valign='middle' align='right'>
      Description:
    </td>
    <td>
      <%= m.text_area :about %>
    </td>
<tr>
    <td valign='middle' align='right'>
      URL:
    </td>
    <td>
     <%= m.text_field :url, :id => "url" %><input type='file' onchange="document.getElementById('url').value = this.value" />
    </td>
<tr>
    <td>
    </td>
    <td>
      <center>
        <%= m.submit %>
      </center>
    </td>
  </table>
</center>
<% end %>

so this is an update action and this give an error message after press the update form button error is:

undefined method `stringify_keys' for "15":String

so I try again with Movie.find(params[:id].to_i) and the output is:

undefined method `stringify_keys' for 15:Fixnum

thanks for answers, have a good day!=)

use Movie.find(params[:id].to_i) and use @mov.update_attributes(params[:movie]) instead of @mov.update_attributes(params[:id]) — Sachin R
– Sachin R, Commented Mar 19, 2013 at 12:18
May be issue with @mov.update_attributes(params[:id]) line. you have passed params[:id] but this is wrong you have to pass params[:movie]. — Sachin R
– Sachin R, Commented Mar 19, 2013 at 12:20
The line number comes in handy when looking at the error.... ;) — DGM
– DGM, Commented Mar 19, 2013 at 12:28

Sagar Bommidi · Accepted Answer · 2013-03-19 12:26:47Z

5

if @mov.update_attributes(params[:id])

Its because of the above line. Here you are trying to update the @mov attribute with the params[:id] which is wrong.

the update action in the controller should be as follow.

def update
  @mov = Movie.find(params[:id])
  if @mov.update_attributes(params[:movie])
    redirect_to movies_path, :notice => "Your movie has been updated."
  else
    render "show"
  end
end

Basically the update_attributes will check for hash as a parameter like below.

@mov.update_attributes(:about => "Sample About", :title => "Sample Title", :url => "Sample URL")

answered Mar 19, 2013 at 12:26

Sagar Bommidi

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