nil object where not expected

rubyonrails-talk
#1

trying to pass a collection of authors using
<%= render :partial => 'author', :collection => @authors %>

_authors.rhtml file has

<tr>
  <td><%= link_to author.name, :action => 'show', :id => @author %></

  <td><%= link_to 'Edit', :action => 'edit', :id => author %></td>
  <td>
    <%= button_to 'Delete', {:action => 'destroy', :id => author},
        :confirm =>
          "Are you sure you want to delete author #{author.name}?" %>
  </td>
</tr>

in
def index
    @authors = Author.find(:all)
    @page_title = 'Listing authors'
end

and I'm getting

You have a nil object when you didn't expect it!
The error occurred while evaluating nil.author

Extracted source (around line #2):

1: <tr>
2: <td><%= link_to @post.author.name, :action => 'show', :id =>
@author %></td>
3: <td><%= link_to 'Edit', :action => 'edit', :id => author %></td>
4: <td>
5: <%= button_to 'Delete', {:action => 'destroy', :id => author},

any ides what I may be doing wrong here ?

#2

Dave wrote:

trying to pass a collection of authors using
<%= render :partial => 'author', :collection => @authors %>

_authors.rhtml file has

<tr>
  <td><%= link_to author.name, :action => 'show', :id => @author %></
>
  <td><%= link_to 'Edit', :action => 'edit', :id => author %></td>
  <td>
    <%= button_to 'Delete', {:action => 'destroy', :id => author},
        :confirm =>
          "Are you sure you want to delete author #{author.name}?" %>
  </td>
</tr>

in
def index
    @authors = Author.find(:all)
    @page_title = 'Listing authors'
end

and I'm getting

You have a nil object when you didn't expect it!
The error occurred while evaluating nil.author

Extracted source (around line #2):

1: <tr>
2: <td><%= link_to @post.author.name, :action => 'show', :id =>
@author %></td>
3: <td><%= link_to 'Edit', :action => 'edit', :id => author %></td>
4: <td>
5: <%= button_to 'Delete', {:action => 'destroy', :id => author},

any ides what I may be doing wrong here ?

Where is @post being set?

#3

@post is not being set, I'm a rails newbie @post was one of the
solutions I found on google, but none are solving my problem this the
error I get

You have a nil object when you didn't expect it!
The error occurred while evaluating nil.name

Extracted source (around line #2):

1: <tr>
2: <td><%= link_to author.name, :action => 'show', :id => @author
%></td>
3: <td><%= link_to 'Edit', :action => 'edit', :id => author %></td>
4: <td>
5: <%= button_to 'Delete', {:action => 'destroy', :id => author},

#4

Hi!

If the partial is called 'author', then the file must be called
'_author.rhtml'

Andrey

#5

Thanks for the help got it working...