Added validations, Added content in Home page

app/controllers/categories_controller.rb

@@ -30,6 +30,9 @@ def update
 	end
 
 	def destroy
+		if @category.destroy
+		redirect_to categories_path
+		end
 	end
 
 	def index

app/controllers/expenses_controller.rb

@@ -13,7 +13,7 @@ def create
 			redirect_to expenses_path
 			flash[:success] = "New expence has been created"
 		else
-			render Expense.new
+			redirect_to new_expense_path
 		end
 	end
 

app/models/category.rb

@@ -1,4 +1,7 @@
 class Category < ActiveRecord::Base
 	belongs_to :user
 	has_many :expenses
+
+	validates :name , uniqueness: true
+	validates :name , presence: true
 end

app/models/expense.rb

@@ -1,4 +1,6 @@
 class Expense < ActiveRecord::Base
 	belongs_to :category
 	belongs_to :user
+
+	validates :amount, :category, :date, :description, presence: true
 end

app/models/user.rb

@@ -6,4 +6,24 @@ class User < ActiveRecord::Base
 
   has_many :categories
   has_many :expenses, through: :categories
+
+  after_create :create_default_categories
+
+  DEFAULT_CATEGORIES = [
+     {name: 'Phone bill'},
+     {name: 'Entertainment'},
+     {name: 'Rent'},
+     {name: 'Travel'},
+     {name: 'Parties'},
+     {name: 'Gifts'},
+     {name: 'Phone bill'},
+     {name: 'Miscellaneous'}
+  ]
+
+  def create_default_categories
+    DEFAULT_CATEGORIES.each do |default_attrs|
+      self.categories.build(default_attrs)
+    end
+  end
+
 end

app/views/expenses/_form.html.erb

@@ -27,9 +27,10 @@
 
  <div class="form-group">
   <%= f.label :category, "Category:" %><br>
-    <div class="col-md-2">
+    <div class="col-md-4">
 
     <%= f.collection_select(:category_id, current_user.categories, :id, :name, {}, { :class => "select_box selectpicker picker"}) %>
+      <%= link_to "+ Add Category", new_category_path %>
     </div>
   </div>
 

app/views/static_pages/home.html.erb

@@ -1,4 +1,16 @@
 <h1> Expence Manager </h1>
+<p>Manage all your expences with hassle free </p>
 
+<div class="well">
+<%= link_to "+ Add Expense", new_expense_path, class: "btn btn-small btn-success" %>
+<%= link_to "+ Add Category", new_category_path, class: "btn btn-small btn-success" %>
+</div>
 
-<p>Manage all your expences with hassle free </p>
+<h3>Benefits:</h3>
+<ul>
+	<li>sorting the expenditures based on the categories.</li>
+	<li>sorting the expenditures based on the period of time.</li>
+	<li>Addition & deletion of personal categories.</li>
+	<li>Graph charts based on certain time periods.</li>
+	<li>Download all the expense list in the excel sheet</li>
+</ul>