作业描述最大长度限制为3000个字符

app/models/bid.rb

@@ -36,7 +36,7 @@ class Bid < ActiveRecord::Base
   acts_as_attachable
 
   NAME_LENGTH_LIMIT = 60
-  DESCRIPTION_LENGTH_LIMIT = 250
+  DESCRIPTION_LENGTH_LIMIT = 3000
   validates :name, length: {maximum: NAME_LENGTH_LIMIT}, presence: true
   validates :description, length: {maximum: DESCRIPTION_LENGTH_LIMIT}
   validates :author_id, presence: true

app/views/courses/_homework_form.html.erb

@@ -36,7 +36,8 @@
                    :maxlength => Bid::DESCRIPTION_LENGTH_LIMIT %>
 </p>
 <% time = (Time.now  + 3600 * 24).strftime('%Y-%m-%d') %>
-<p><%= f.text_field(:deadline, :required => true, :size => 60, :style => "width:150px;",:value => "#{time}", :onchange => "regexDeadLine();", :readonly => true) %>
+<p>
+  <%= f.text_field(:deadline, :required => true, :size => 60, :style => "width:150px;",:value => "#{time}", :onchange => "regexDeadLine();", :readonly => true) %>
   <%= calendar_for('bid_deadline')%>
   <span id="bid_deadline_span">
   </span>

db/migrate/20141029065917_change_bids_description_type.rb

@@ -0,0 +1,5 @@
+class ChangeBidsDescriptionType < ActiveRecord::Migration
+  def change
+    change_column :bids, :description, :text, default: nil
+  end
+end

db/schema.rb

@@ -11,7 +11,7 @@
 #
 # It's strongly recommended to check this file into your version control system.
 
-ActiveRecord::Schema.define(:version => 20141013023400) do
+ActiveRecord::Schema.define(:version => 20141029065917) do
 
   create_table "activities", :force => true do |t|
     t.integer "act_id",   :null => false
@@ -98,7 +98,7 @@ ActiveRecord::Schema.define(:version => 20141013023400) do
     t.string   "budget",                        :null => false
     t.integer  "author_id"
     t.date     "deadline"
-    t.string   "description"
+    t.text     "description"
     t.datetime "created_on",                    :null => false
     t.datetime "updated_on",                    :null => false
     t.integer  "commit"