I have two models generated with generate scaffolding, one is a LogBook the other is LogEntry. I want to render the form partial for LogEntry on the LogBook show page. When I call render on the partial I get this error:
undefined method `model_name' for NilClass:Class
I assume it is because the default _form uses an instance variable which isn't present when called from a separate controller. So I tried converting the LogEntry _form.html.erb to use local variables and passed them in via the render call. After this here is the error:
Model LogEntry does not respond to Text
How can I include this partial into the show page form a different controller?
Models:
class LogBook < ActiveRecord::Base
belongs_to :User
has_many :LogEntries, :dependent => :destroy
end
class LogEntry < ActiveRecord::Base
belongs_to :LogBook, :class_name => "log_book", :foreign_key => "log_book_id"
end
LogEntry _form.html.erb (using local variable):
<%= form_for(log_entry) do |f| %>
<% if log_entry.errors.any? %>
<div id="error_explanation">
<h2><%= pluralize(log_entry.errors.count, "error") %> prohibited this log_entry from being saved:</h2>
<ul>
<% log_entry.errors.full_messages.each do |msg| %>
<li><%= msg %></li>
<% end %>
</ul>
</div>
<% end %>
<div class="field">
<%= f.label :Text %><br />
<%= f.text_field :Text %>
</div>
<div class="actions">
<%= f.submit %>
</div>
<% end %>
LogBook show.html.erb:
<p id="notice"><%= notice %></p>
<p>
<b>Name:</b>
<%= @log_book.name %>
</p>
<%= render 'log_entries/form', :log_entry => @log_book.LogEntries.new %>
<%= link_to 'Edit', edit_log_book_path(@log_book) %> |
<%= link_to 'Back', log_books_path %>
You can render whatever partial you want as long as you give it's path from the view folder:
<%= render :partial => '/log_entries/form', :log_entry => @log_book.log_entries.build %>
Your path must begin with a / to let Rails know you're relative to the view folder.
Otherwise it's assumed to be relative to your current folder.
As a sidenote, it's good practive to avoid using instance variables in partial, you did it right then.
Just seen you have an error in your partial's form:
:Text
Should not be a valid column name of your model. Try :text