字段合并

db/migrate/20190705085829_add_sec_key_to_outputs.rb

@@ -1,5 +1,7 @@
 class AddSecKeyToOutputs < ActiveRecord::Migration[5.2]
   def change
     add_column :outputs, :sec_key, :string
+    add_column :outputs, :ts_mem, :float
+    add_column :outputs, :ts_time, :float
   end
 end

db/migrate/20190716062401_add_ts_time_to_outputs.rb

@@ -1,5 +0,0 @@
-class AddTsTimeToOutputs < ActiveRecord::Migration[5.2]
-  def change
-    add_column :outputs, :ts_time, :float
-  end
-end

db/migrate/20190718100242_add_ts_mem_to_outputs.rb

@@ -1,5 +0,0 @@
-class AddTsMemToOutputs < ActiveRecord::Migration[5.2]
-  def change
-    add_column :outputs, :ts_mem, :float
-  end
-end