[EPIC P] Add api for batch creation.

app/controllers/bicycles_controller.rb

@@ -10,10 +10,14 @@ def index
   end
 
   def create
-    if bicycle.save
-      redirect_to bicycle, notice: 'Bicycle was successfully saved.'
+    if params[:bicycle].present?
+      if bicycle.save
+        redirect_to bicycle, notice: 'Bicycle was successfully saved.'
+      else
+        respond_with bicycle
+      end
     else
-      respond_with bicycle
+      batch_create
     end
   end
 
@@ -23,4 +27,22 @@ def destroy
     bicycle.destroy
     redirect_to bicycles_url
   end
+
+  def batch_create
+    if params[:bicycles].present?
+      bikes = []
+      all_saved = false
+      ActiveRecord::Base.transaction do
+        params[:bicycles].each do |bicycle_hash|
+          bikes << Bicycle.new(bicycle_hash)
+        end
+        all_saved = bikes.all? { |bike| bike.save}
+      end
+      all_saved ? response.status= 200 : response.status= 422
+      render :text => ''
+    else
+      response.status= 422
+      render :text => "Please provide a bicycle or a list of bicycles"
+    end
+  end
 end

spec/api/bicycle_spec.rb

@@ -28,4 +28,15 @@ def json_response
     post '/bicycles', {:bicycle => {:name => 'my first bike', :wheels_attributes => [{:name => 'my first wheel'}]}}
     Bicycle.first.wheels.first.name.should == 'my first wheel'
   end
+
+  it "can create multiple bicycles in one request" do
+    post '/bicycles', {:bicycles => [{:name => 'my first bike', :wheels_attributes => [{:name => 'my first wheel'}]},
+                                     {:name => 'my second bike', :wheels_attributes => [{:name => 'my second wheel'}]}]}
+    names = Bicycle.all.map(&:name)
+    names.should include('my first bike')
+    names.should include('my second bike')
+    wheels = Bicycle.all.map(&:wheels).flatten.map(&:name)
+    wheels.should include('my first wheel')
+    wheels.should include('my second wheel')
+  end
 end