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Manish Belsare

2010-Feb-28 10:36 UTC

How to access id passed to link_to function in controller?

<% if logged_in? and post.match?(post.id) %>
          <%= $n = post.id %>
          <%= link_to "Answer this Query!",
          :controller => "answers",
          :action => "new",
          :idd => post.id %>

Hello sir,
   In the example given above, i am calling a new method to answer the
query submitted by the user for the "idd" ie. according to the
"id" of
the question.
Bt i cant get this id in the answer_controller which i want..
i hav even declared a global variable in the program which tracks the
post id..
can u please help me in accessing the "idd" when the user clicks the
link and goes to the action "new" page.
I want the "particular id of the post that has been posted by the user
as i am getting the array of post id''s but not the id of the particular
post when i click it.
Please Help..
Following is my code in answer controller..




$x = 0
class AnswersController < ApplicationController
helper :profile, :avatar
include ProfileHelper
include AvatarHelper
before_filter :protect, :load_post

  def new
  #flash[:notice] = post.id
  id=session[:user_id]
     Question.find_each do |@que|
        if(@que.user_id == id)            # id is user id
          @que_id = "#{@que.id}"          #que_id is question_id
          break
        end
     end
     idd=@que_id
     flash[:notice] = idd
     iddd=idd.to_i

     Post.find_each do |@pos|
       if(@pos.question_id == iddd)       # id is question id => {iddd
|| @que_id.to_i}
         @pid = "#{@pos.id}"              # pos_id is id in posts
table
   #flash[:notice] = @pid.to_s
         break
       end
    end
    #flash[:notice] = id

    @posts = Post.find(@pid)
    @post = Post.find(params[:idd])

    @answer = Answer.new
    @title = "Post your Answer Here!"
    #@post = @posts

    $x = @post.id
    mm = $x
    #flash[:notice] = mm

    @post = mm

  end


  def create
    @answer = Answer.new(params[:answer])
    @answer.user = User.find(session[:user_id])
    @answer.post = @post

   inc = 0

   Answer.find_each do |@aid|
      inc = @aid.id.to_i                   #que_id is question_id
   end
   cnt = inc + 1
   @answer.answer_id = cnt
   #flash[:notice] = "User ID is " + session[:user_id].to_s
   @answer.question_id = @que_id.to_i
   @post.answer_id = cnt
   respond_to do |format|
      if @answer.duplicate? or @post.answers << @answer
         flash[:notice] = ''Answer is Posted Successfully!.''
         format.html { redirect_to post_url(:id => @post) }
         format.xml { head :created, :location => post_url(:id => @post)
}
      else
         format.html { render :action => "new" }
         format.xml { render :xml => @post.errors.to_xml }
      end
    end
  end

 def destroy
   @answer = Answer.find(params[:id])
   user = User.find(session[:user_id])
   if @answer.authorized?(user)
      @answer.destroy
   else
     redirect_to hub_url
     return
   end
   respond_to do |format|
    format.html { redirect_to posts_url }
        format.xml { head :ok }
    end
 end

private

  def load_post
  private

  def load_post
      id=session[:user_id]
     Question.find_each do |@que|
       if(@que.user_id == id)           # id is user id
         @que_id = "#{@que.id}"         #que_id is question_id
         break
       end
      end

     #flash[:notice] = @que_id
     @question = Question.find(@que_id)

     idd=@que_id
     #flash[:notice] = idd
     iddd=idd.to_i
     Post.find_each do |@pos|
       if(@pos.question_id == iddd)      # id is question id => {iddd ||
@que_id.to_i}
          @pid = "#{@pos.id}"            #pos_id is id in posts table
    #flash[:notice] = @pid.to_s
          break
       end
     end
     @post = Post.find(@pid) ................................EQN [1]
  end

end


Sir here as i hav marked here EQN[1] which suggests that i want the row
in the posts table to be collected in instance variable @post.
Bt the row should correspond to "idd => post.id"
ie. @post should contain id of the post when i click the link.


Also when i click i want to get the ques_string corresponding to the
post.id
i.e. I want @post.ques_string which it says "ques_string" is
undefined?
Waiting for ur Reply...
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Colin Law

2010-Feb-28 10:56 UTC

head link

Re: How to access id passed to link_to function in controller?

On 28 February 2010 10:36, Manish Belsare
<lists-fsXkhYbjdPsEEoCn2XhGlw@public.gmane.org>
wrote:>  <% if logged_in? and post.match?(post.id) %>
>          <%= $n = post.id %>
>          <%= link_to "Answer this Query!",
>          :controller => "answers",
>          :action => "new",
>          :idd => post.id %>
>
> Hello sir,
>   In the example given above, i am calling a new method to answer the
> query submitted by the user for the "idd" ie. according to the
"id" of
> the question.
> Bt i cant get this id in the answer_controller which i want..
You have posted an apparently very complex set of questions with a lot
of code.  I think you might do better to try and simplify the problem
as much as possible and ask just one question at a time.  I will
attempt to answer the simple question asked above.  As you have coded
it above then the value post.id should be available in params[:idd].
If it is not there then have a look in development.log and you will
see the parameters sent from the browser.

Colin

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Manish Belsare

2010-Feb-28 13:14 UTC

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Re: How to access id passed to link_to function in controller?

Sir basically i want the idd from  the link_to part i.e wen i click the 
"Answer this query!" link then the browser will redirect to:
http://0.0.0.0:3000/answers/new?idd=9

now i want the idd = 9 to be assinged to the @post
or even a query like @post = Post.find(params[:id]) will do..
bt i dont know how to get that id in answer controller..

i want the id which is 9 to be available in answer_controller...
How 2 achieve this?
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Colin Law

2010-Feb-28 13:39 UTC

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Re: Re: How to access id passed to link_to function in controller?

On 28 February 2010 13:14, Manish Belsare
<lists-fsXkhYbjdPsEEoCn2XhGlw@public.gmane.org>
wrote:> Sir basically i want the idd from  the link_to part i.e wen i click the
> "Answer this query!" link then the browser will redirect to:
> http://0.0.0.0:3000/answers/new?idd=9
The code you posted, that you have now snipped should do exactly that.
 As I suggested previously have a look in development.log and see what
parameters are posted.  In fact first look at the html of the page
(View, Page source or similar in browser) and see what url has been
generated for the link.

Colin
>
> now i want the idd = 9 to be assinged to the @post
> or even a query like @post = Post.find(params[:id]) will do..
> bt i dont know how to get that id in answer controller..
>
> i want the id which is 9 to be available in answer_controller...
> How 2 achieve this?
> --
> Posted via http://www.ruby-forum.com/.
>
> --
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>
>
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Manish Belsare

2010-Feb-28 13:40 UTC

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Re: How to access id passed to link_to function in controller?

Sir even i want to know where does the id in the link :
http://0.0.0.0:3000/answers/new?idd=9
is available..

Can i get this id in any variable whem i reach that page(action) so that 
i can access it and compare in a loop as i hav already got an array of 
id''s in instance variable..
So on comparing this id with id''s in the loop i can get the
result...ie.
@post
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Manish Belsare

2010-Feb-28 13:47 UTC

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Re: Re: How to access id passed to link_to function in controller?

<!DOCTYPE HTML PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
  "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html>
  <head>
    <title>Post your Answer Here!</title>
    <link href="/stylesheets/site.css?1267104655"
media="screen"
rel="stylesheet" type="text/css" />
    <link href="/stylesheets/profile.css?1267104655"
media="screen"
rel="stylesheet" type="text/css" />
    <script src="/javascripts/prototype.js?1267104655" 
type="text/javascript"></script>
  </head>
  <body>

    <div id="whole_page">
      <div id="header">Knowledge Sharing Engine</div>
     <div id="nav">
       <span style="float: right">
                <a href="/user">Profile</a> |
         <a href="/user/logout">Logout</a>
             </span>

         <a href="/">Home</a> |
    <a href="/site/about">About Us</a> |
    <a href="/site/help">Help</a> |
         <a href="/community">Community</a>
         <hr noshade/>
  <div id="post_question">
   <blink><a href="/user/register">Post A
Question!</a></blink>

  </div>
    </div>
        <div id="content">
              <h1> Post Your Answer</h1>
<form action="/answers" method="post">
<fieldset>
  <legend>New Answer</legend>

<div class="form_row">

  <label for="ans_string">Answer String:</label>
  <textarea cols="60" id="answer_ans_string"
name="answer[ans_string]"
rows="20"></textarea>
</div>

  <input class="submit" name="commit"
type="submit" value="Create" />
</fieldset>
</form>

        <br clear="all" />
      </div>


      <div id="debug">
        <a href="#"
onclick="Element.toggle(''params_debug_info'');return
false">
         params</a> |
        <a href="#"
onclick="Element.toggle(''session_debug_info'');return
false">
         session</a>
        <fieldset id="params_debug_info"
class="debug_info"
style="display:none">
          <legend>params</legend>

          <pre class=''debug_dump''>---
!map:HashWithIndifferentAccess
action: new
controller: answers
idd: &quot;9&quot;
</pre>
        </fieldset>
        <fieldset id="session_debug_info"
class="debug_info"
                  style="display:none">
          <legend>session</legend>
          <code class=''debug_dump''>{:user_id=&gt;3, 
&quot;flash&quot;=&gt;{}}</code>

        </fieldset>
     </div>

   <!--/div -->
  </body>
</html>

Sir this is the source generated..

Itz diff 2 understant da url generated..
n how to check the id in development.log file?
i dnt hav any idea abt how 2 check it..
The simple contents of this file are:

# Settings specified here will take precedence over those in 
config/environment.rb

# In the development environment your application''s code is reloaded on
# every request.  This slows down response time but is perfect for 
development
# since you don''t have to restart the webserver when you make code 
changes.
config.cache_classes = false

# Log error messages when you accidentally call methods on nil.
config.whiny_nils = true

# Show full error reports and disable caching
config.action_controller.consider_all_requests_local = true
config.action_view.debug_rjs                         = true
config.action_controller.perform_caching             = false

config.action_mailer.delivery_method = :test

# Raise Errors if the mailer can''t send
config.action_mailer.raise_delivery_errors = true
Please help
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Colin Law

2010-Feb-28 13:48 UTC

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Re: Re: How to access id passed to link_to function in controller?

On 28 February 2010 13:40, Manish Belsare
<lists-fsXkhYbjdPsEEoCn2XhGlw@public.gmane.org>
wrote:> Sir even i want to know where does the id in the link :
> http://0.0.0.0:3000/answers/new?idd=9
> is available..
>
> Can i get this id in any variable whem i reach that page(action) so that
> i can access it and compare in a loop as i hav already got an array of
> id''s in instance variable..
> So on comparing this id with id''s in the loop i can get the
result...ie.
> @post
The idd value will be available in answers#new as params[:idd].

I suggest that you have a look at the rails guides at
http://guides.rubyonrails.org/
Start with Getting Started, work through it making sure that you fully
understand. Then move on to the other guides.  Particularly
ActiveRecord Associations and also Debugging.  Then you should be able
to answer basic questions yourself.

Good luck.

Colin

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Colin Law

2010-Feb-28 13:52 UTC

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Re: Re: Re: How to access id passed to link_to function in controller?

On 28 February 2010 13:47, Manish Belsare
<lists-fsXkhYbjdPsEEoCn2XhGlw@public.gmane.org>
wrote:>...
>
> Itz diff 2 understant da url generated..
> n how to check the id in development.log file?
> i dnt hav any idea abt how 2 check it..
> The simple contents of this file are:
>
> # Settings specified here will take precedence over those in
> config/environment.rb
That is not development.log that is development.rb  The log files are
in the folder call log

As I said in previous email I think you need to start with some
tutorials and guides in order to understand the basics of ruby and
rails.

Colin

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Manish Belsare

2010-Feb-28 14:02 UTC

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Re: Re: How to access id passed to link_to function in controller?

Processing AnswersController#new (for 127.0.0.1 at 2010-02-28 19:21:26) 
[GET]
  Parameters: {"idd"=>"9"}
   [4;35;1mQuestion Load (0.5ms) [0m    [0mSELECT * FROM `questions` 
WHERE (questions.id >= 0) ORDER BY questions.id ASC LIMIT 1000 [0m


yes sir i get dat idd = 9 in the development.log file..
bt nw how to get it in the variable ..
can i declare it as @post = idd?

i need this answer urgently sir ..plzzz can u help me now?
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Colin Law

2010-Feb-28 14:05 UTC

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Re: Re: Re: How to access id passed to link_to function in controller?

On 28 February 2010 14:02, Manish Belsare
<lists-fsXkhYbjdPsEEoCn2XhGlw@public.gmane.org>
wrote:> Processing AnswersController#new (for 127.0.0.1 at 2010-02-28 19:21:26)
> [GET]
>  Parameters: {"idd"=>"9"}
>   [4;35;1mQuestion Load (0.5ms) [0m    [0mSELECT * FROM `questions`
> WHERE (questions.id >= 0) ORDER BY questions.id ASC LIMIT 1000 [0m
>
>
> yes sir i get dat idd = 9 in the development.log file..
> bt nw how to get it in the variable ..
> can i declare it as @post = idd?
As I have said previously it will be available in params[:idd] in
AnswersController#new

Colin

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Manish Belsare

2010-Feb-28 14:10 UTC

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Re: Re: Re: How to access id passed to link_to function in controller?

@pp = Post.find(params[:idd])
     flash[:notice] = "Question: " + @pp.question_id


sir when i do this it says cannot convert Fixnum into String..
Can u help me in resolving this problem?
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Michael Pavling

2010-Feb-28 14:14 UTC

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Re: Re: Re: Re: How to access id passed to link_to function in controller?

On 28 February 2010 14:10, Manish Belsare
<lists-fsXkhYbjdPsEEoCn2XhGlw@public.gmane.org>
wrote:>  @pp = Post.find(params[:idd])
>     flash[:notice] = "Question: " + @pp.question_id
>
>
> sir when i do this it says cannot convert Fixnum into String..
> Can u help me in resolving this problem?
http://tinyurl.com/yh6bajd

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Manish Belsare

2010-Feb-28 14:30 UTC

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Re: Re: Re: Re: How to access id passed to link_to function in controller?

before_filter :protect, :load_post


private

  def load_post
      id=session[:user_id]
     Question.find_each do |@que|
      if(@que.user_id == id)           # id is user id
         @que_id = "#{@que.id}"     #que_id is question_id
         break
       end
      end

     #flash[:notice] = @que_id
     @question = Question.find(@que_id)

     idd=@que_id
     #flash[:notice] = idd
     iddd=idd.to_i
     Post.find_each do |@pos|
       if(@pos.question_id == iddd)           # id is question id => 
{iddd || @que_id.to_i}
          @pid = "#{@pos.id}"     #pos_id is id in posts table
    #flash[:notice] = @pid.to_s
          break
       end
     end
     @post = Post.find(@pid)


    @post = Post.find(params[:idd])...........(1)
  end


Sir, even if i comment the entire lines in the prog and juzz keep eqn 
(1) which contains the "idd" and then execute the code, it says cannot
find Post without an ID when @post = Post.find(params[:idd]) has that id 
of the post..
What could the reason be for the same?


def create
    #@post = $n
    @answer = Answer.new(params[:answer])
    @answer.user = User.find(session[:user_id])
    @answer.post = @post

   inc = 0

   Answer.find_each do |@aid|
      inc = @aid.id.to_i                   #que_id is question_id
   end
   cnt = inc + 1
   @answer.answer_id = cnt
   #flash[:notice] = "User ID is " + session[:user_id].to_s
   @answer.question_id = @que_id.to_i
   @post.answer_id = cnt
   respond_to do |format|
      if @answer.duplicate? or @post.answers << @answer
         flash[:notice] = ''Answer is Posted Successfully!.''
         format.html { redirect_to post_url(:id => @post) }
         format.xml { head :created, :location => post_url(:id => @post) 
}
      else
         format.html { render :action => "new" }
         format.xml { render :xml => @post.errors.to_xml }
      end
    end
  end

This is the create action..where @post is required..Please help sir..
Thank yuh for ur worthy guidance!
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Manish Belsare

2010-Feb-28 15:53 UTC

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Re: Re: Re: Re: How to access id passed to link_to function in controller?

Sir, i want to know does only ''params[:idd]'' give the same id
that was
passed?
Or i need to do Post.find([params[:idd]) and then contiune?
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Punit Rathore

2010-Feb-28 18:58 UTC

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Re: Re: Re: Re: How to access id passed to link_to function in controller?

params[:idd] would give you the "idd" you are passing.
Post.find([params[:idd]) would return the post with id equal to the 
passed "idd".

Try googling any issues. Most of the issues can be solved within 2 
minutes.

Manish Belsare wrote:> Sir, i want to know does only ''params[:idd]'' give the
same id that was
> passed?
> Or i need to do Post.find([params[:idd]) and then contiune?
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Rails - Feb 2010 - How to access id passed to link_to function in controller?

How to access id passed to link_to function in controller?

Re: How to access id passed to link_to function in controller?

Re: How to access id passed to link_to function in controller?

Re: Re: How to access id passed to link_to function in controller?

Re: How to access id passed to link_to function in controller?

Re: Re: How to access id passed to link_to function in controller?

Re: Re: How to access id passed to link_to function in controller?

Re: Re: Re: How to access id passed to link_to function in controller?

Re: Re: How to access id passed to link_to function in controller?

Re: Re: Re: How to access id passed to link_to function in controller?

Re: Re: Re: How to access id passed to link_to function in controller?

Re: Re: Re: Re: How to access id passed to link_to function in controller?

Re: Re: Re: Re: How to access id passed to link_to function in controller?

Re: Re: Re: Re: How to access id passed to link_to function in controller?

Re: Re: Re: Re: How to access id passed to link_to function in controller?