init project

db/migrate/20200103062707_create_issue_times.rb

@@ -0,0 +1,13 @@
+class CreateIssueTimes < ActiveRecord::Migration[5.2]
+  def change
+    # create_table :issue_times do |t|
+    #   t.integer :issue_id
+    #   t.integer :user_id
+    #   t.datetime :start_time
+    #   t.datetime :end_time
+    #   t.string :cost_time
+    #   t.timestamps
+    # end
+    # add_index :issue_times, [:issue_id, :user_id]
+  end
+end