post in (or not in) a forum

app/controllers/posts_controller.rb

@@ -29,6 +29,7 @@ class PostsController < ApplicationController
   # GET /posts/new.json
   def new
     @post = Post.new
+    @forum = Forum.find_by_id(params[:forum_id]) || Forum.new
 
     respond_to do |format|
       format.html # new.html.haml

app/models/post.rb

@@ -1,7 +1,7 @@
 class Post < ActiveRecord::Base
   extend FriendlyId
   friendly_id :author_date_subject, use: :slugged
-  attr_accessible :body, :subject, :author_id
+  attr_accessible :body, :subject, :author_id, :forum_id
   belongs_to :author, :class_name => 'Member'
   belongs_to :forum
   has_many :comments, :dependent => :destroy

app/views/posts/_form.html.haml

@@ -6,14 +6,18 @@
         - @post.errors.full_messages.each do |msg|
           %li= msg
 
-  .field
-    = f.label :author_id
-    = f.number_field :author_id
-  .field
-    = f.label :subject
-    = f.text_field :subject
-  .field
-    = f.label :body
-    = f.text_area :body
-  .actions
-    = f.submit 'Save'
+
+  = label_tag :post, "Subject"
+  = f.text_field :subject, :class => 'input-block-level'
+  = label_tag :body, "What's going on in your food garden?"
+  = f.text_area :body, :rows => 12, :class => 'input-block-level'
+
+  - if @post.forum || @forum
+    - forum = @post.forum || @forum
+    %p
+      This post will be posted in the forum
+      =link_to forum.name, forum
+    .field
+      = f.hidden_field :forum_id, :value => forum.id
+
+  = f.submit "Post", :class => 'btn'

app/views/posts/edit.html.haml

@@ -1,7 +1,4 @@
 = content_for :title, "Edit post"
 
-= form_for @post do |f|
-  = label_tag :subject, "Subject"
-  = f.text_field :subject, :class => 'input-block-level'
-  = f.text_area :body, :rows => 12, :class => 'input-block-level'
-  = f.submit "Post"
+=render 'form'
+

app/views/posts/new.html.haml

@@ -1,9 +1,4 @@
-= content_for :title, "Post a post"
+= content_for :title, @forum.name ? "Post in #{@forum.name}" : "Post something"
+
+=render 'form'
 
-= form_for @post, :url => { :action => "create" } do |f|
-  %fieldset
-    = label_tag :post, "Subject"
-    = f.text_field :subject, :class => 'input-block-level'
-    = label_tag :body, "What's going on in your food garden?"
-    = f.text_area :body, :rows => 12, :class => 'input-block-level'
-    = f.submit "Post", :class => 'btn'

spec/controllers/posts_controller_spec.rb

@@ -39,6 +39,17 @@ describe PostsController do
       get :new, {}
       assigns(:post).should be_a_new(Post)
     end
+
+    it "picks up forum from params" do
+      forum = FactoryGirl.create(:forum)
+      get :new, {:forum_id => forum.id}
+      assigns(:forum).should eq(forum)
+    end
+
+    it "doesn't die if no forum specified" do
+      get :new, {}
+      assigns(:forum).should be_a_new(Forum)
+    end
   end
 
   describe "GET edit" do

spec/views/forums/show.html.haml_spec.rb

@@ -10,4 +10,8 @@ describe "forums/show" do
     rendered.should contain @forum.description
     rendered.should contain @forum.owner.to_s
   end
+
+  it 'links to new post with the forum id' do
+    assert_select "a[href=#{new_post_path(:forum_id => @forum.id)}]"
+  end
 end

spec/views/posts/edit.html.haml_spec.rb

@@ -19,5 +19,33 @@ describe "posts/edit" do
         assert_select "textarea#post_body", :name => "post[body]"
       end
     end
+
+    it 'no hidden forum field' do
+      assert_select "input#post_forum_id[type=hidden]", false
+    end
+
+    it 'no forum mentioned' do
+      rendered.should_not contain "This post will be posted in the forum"
+    end
+
+    context "forum specified" do
+      before(:each) do
+        @forum = assign(:forum, FactoryGirl.create(:forum))
+        assign(:post, FactoryGirl.create( :post,
+          :forum => @forum,
+          :author => @author
+        ))
+        render
+      end
+
+      it 'creates a hidden field' do
+        assert_select "input#post_forum_id[type=hidden][value=#{@forum.id}]"
+      end
+
+      it 'tells the user what forum it will be posted in' do
+        rendered.should contain "This post will be posted in the forum #{@forum.name}"
+      end
+    end
+
   end
 end

spec/views/posts/new.html.haml_spec.rb

@@ -4,15 +4,41 @@ describe "posts/new" do
   before(:each) do
     @author = FactoryGirl.create(:member)
     assign(:post, FactoryGirl.create(:post, :author => @author))
+    assign(:forum, Forum.new)
     sign_in @author
     controller.stub(:current_user) { @author }
-    render
   end
 
   it "renders new post form" do
+    render
     assert_select "form", :action => posts_path, :method => "post" do
       assert_select "input#post_subject", :name => "post[subject]"
       assert_select "textarea#post_body", :name => "post[body]"
     end
   end
+
+  it 'no hidden forum field' do
+    assert_select "input#post_forum_id[type=hidden]", false
+  end
+
+  it 'no forum mentioned' do
+    rendered.should_not contain "This post will be posted in the forum"
+  end
+
+  context "forum specified" do
+    before(:each) do
+      @forum = assign(:forum, FactoryGirl.create(:forum))
+      assign(:post, FactoryGirl.create(:post, :forum => @forum))
+      render
+    end
+
+    it 'creates a hidden field' do
+      assert_select "input#post_forum_id[type=hidden][value=#{@forum.id}]"
+    end
+
+    it 'tells the user what forum it will be posted in' do
+      rendered.should contain "This post will be posted in the forum #{@forum.name}"
+    end
+  end
+
 end