Ruby で Firestore（雛形）

studying_firestore.rb

# gem 'google-cloud-firestore'

GOOGLE_APPLICATION_CREDENTIALS='foobar-firestore-beginner-1234567890abcdef.json'

require 'google/cloud/firestore'

firestore = Google::Cloud::Firestore.new(
  project_id: 'foobar-12345678901234567890',
  credentials: GOOGLE_APPLICATION_CREDENTIALS
)

city = firestore.col('cities').doc('SF')
city.set(
  {
    name: 'San Francisco',
    state: 'CA',
    country: 'USA',
    capital: false,
    population: 860000
  }
)