Wrong controller is active when using an external SQL table. - sql

Question

I am working on a back-office app. The apps I am deploying have a model/table of user_messages. The user messages are used to display admin messages from a central app. The idea is that I can use that app to publish messages to the individual apps such as "System will be unavailable from noon to 1 on Friday".
The individual apps use their own schema in the database. for example, the research library would be rl.user_messages etc.
Since I will need to access multiple tables, I set it up so I can access external tables.
production:
adapter: sqlserver
host: server1
port: 1435
database: web
username: XX
password: xXX
schema_search_path: umc
technical_libraries:
adapter: sqlserver
host: server1
port: 1435
database: XXXX
username: XX
password: XXXXXXXX
schema_search_path: tl
The model that lets me connect to the technical library as an external model is
class TechnicalLibrary < ActiveRecord::Base
self.abstract_class = true
def self.table_name_prefix
'tl_'
end
establish_connection "technical_libraries" # TODO might want to name this to a generic
end
class UserMessage < TechnicalLibrary
self.table_name = "tl.user_messages" # for this one, as opposed to the product development, we need to specify the schema.
end
My technical Libraries controller is
class TechnicalLibrariesController < ApplicationController
def index
#user_messages= TechnicalLibrary::UserMessage.all
end
def show
#technical_library = TechnicalLibrary::UserMessage.first # TODO HARDWIRED -
end
def new
#technical_library = TechnicalLibrary::UserMessage.new
end
def edit
#technical_library = TechnicalLibrary::UserMessage.find(params[:id])
end
def create
#technical_library = TechnicalLibrary::UserMessageRl.new(technical_library_params)
respond_to do |format|
if #technical_library.save
format.html { redirect_to #technical_library, notice: 'Technical library was successfully created.' }
format.json { render :show, status: :created, location: #technical_library }
else
format.html { render :new }
format.json { render json: #technical_library.errors, status: :unprocessable_entity }
end
end
end
def update
respond_to do |format|
if #technical_library.update(technical_library_params)
format.html { redirect_to #technical_library, notice: 'technical library was successfully updated.' }
format.json { render :show, status: :ok, location: #technical_library }
else
format.html { render :edit }
format.json { render json: #technical_library.errors, status: :unprocessable_entity }
end
end
end
def destroy
end
end
private
# Use callbacks to share common setup or constraints between actions.
def set_technical_library
#technical_library = TechnicalLibrary.find(params[:id])
end
# Never trust parameters from the scary internet, only allow the white list through.
def technical_library_params
params.require(:technical_library).permit(:message, :expires)
end
My technical Libraries form is
<%= form_for(#technical_library) do |f| %>
<% if #technical_library.errors.any? %>
<div id="error_explanation">
<h2><%= pluralize(#technical_library.errors.count, "error") %> prohibited this technical_library from being saved:</h2>
<ul>
<% #technical_library.errors.full_messages.each do |message| %>
<li><%= message %></li>
<% end %>
</ul>
</div>
<% end %>
<div class="field">
<%= f.label :message %><br>
<%= f.text_field :message %>
</div>
<div class="field">
<%= f.label :expires %><br>
<%= f.datetime_select :expires %>
</div>
<div class="actions">
<%= f.submit %>
</div>
<% end %>
<hr>
Controller <%= controller_name %> | <%= action_name %>
<hr>
The form looks as follows. The submit button seems to be wrong. it is pointing to another model.
If I click on the submit button, I get an error message as follows. I suspect that the problem lies in inheriting from another model.
NameError in UserMessagesController#show
uninitialized constant TechnicalLibrary::UserMessageRl
Rails.root: C:/Users/cmendla/RubymineProjects/user_message_console_3
Application Trace | Framework Trace | Full Trace
app/controllers/user_messages_controller.rb:15:in `show'
Request
Parameters:
{"id"=>"1"}
I had a UserMessage model that I'm probably not going to use since I will connect to the individual application's tables.
class UserMessage < ActiveRecord::Base
end

Answer 1

OK - figured it out. I had to specify the controller and action in the form_for statement.
<%= form_for #technical_library, :url => { :controller => "technical_libraries", :action => "update" }, :html => {:method => :post} do |f| %>
That seems to be doing the trick