seed値入力

100.times do |n|
  email = Faker::Internet.email
  password = 'q12345'
  User.create!(email: email,
               password: password,
               password_confirmation: password,
               )
end

require 'faker'

100.times do |n|
  family_name = Gimei.last.kanji
  last_name = Gimei.first.kanji
  family_name_prono = Gimei.last.katakana
  last_name_prono = Gimei.first.katakana
  postal_code = Faker::Lorem.characters(number: 3, min_numeric: 3) + '-' + Faker::Lorem.characters(number: 4, min_numeric: 4) 
  prefecture_id = Faker::Number.between(from: 2, to: 48)
  address = Gimei.address.city.kanji
  street = Gimei.address.town.kanji + Faker::Lorem.characters(number: 1, min_numeric: 1) + '-' + Faker::Lorem.characters(number: 2, min_numeric: 2) 
  phone_number = '0'+ Faker::Lorem.characters(number: 10, min_numeric: 10)
  sex = Faker::Number.between(from: 1, to: 2)
  body_weight = Faker::Number.between(from: 45, to: 115)
  tall = Faker::Number.between(from: 135, to: 205)
  birthday = Faker::Date.between(from: '1959-1-1', to: '2001-12-31')
  Profile.create!(family_name: family_name,
               first_name: last_name,
               family_name_prono: family_name_prono,
               first_name_prono: last_name_prono,
               postal_code: postal_code,
               prefecture_id: prefecture_id,
               address: address,
               street: street,
               phone_number: phone_number,
               sex: sex,
               body_weight: body_weight,
               tall: tall,
               birthday: birthday,
               user_id: User.find(n+1).id,
               )
end

上記csvをデータインストール

require "csv"

CSV.foreach('db/本表-表1.csv', headers: true)  do |row|
  FoodStuff.create(
  food_stuff: row['food_name'],
  calorie: row['calorie'],
  protein: row['protein'],
  carbohydrate: row['carbohydrate'],
  sugar_content: row['sugar_content'],
  salt: row['salt'],
  lipid: row['lopid'],
  fiber: row['fiber'],
)
end