カラム削除に伴い NULL を許可する必要がなくなったから

Author: lime1024

db/migrate/20210314083207_remove_classification_from_medical_bills.rb

@@ -0,0 +1,11 @@
+class RemoveClassificationFromMedicalBills < ActiveRecord::Migration[6.0]
+  def up
+    remove_column :medical_bills, :classification, :string
+    change_column_null :medical_bills, :classification_id, false
+  end
+
+  def down
+    add_column :medical_bills, :classification, :string
+    change_column_null :medical_bills, :classification_id, true
+  end
+end

db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 2021_03_07_150929) do
+ActiveRecord::Schema.define(version: 2021_03_14_083207) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -29,14 +29,13 @@
 
   create_table "medical_bills", force: :cascade do |t|
     t.date "day", null: false
-    t.string "classification"
     t.integer "cost", null: false
     t.datetime "created_at", null: false
     t.datetime "updated_at", null: false
     t.bigint "user_id", null: false
     t.bigint "family_member_id", null: false
     t.bigint "payee_id", null: false
-    t.bigint "classification_id"
+    t.bigint "classification_id", null: false
     t.index ["classification_id"], name: "index_medical_bills_on_classification_id"
     t.index ["family_member_id"], name: "index_medical_bills_on_family_member_id"
     t.index ["payee_id"], name: "index_medical_bills_on_payee_id"