To develop and test your application locally, you can use the Google Cloud
Firestore
Emulator,
which provides local emulation of the production Google Cloud Firestore
environment. You can start the Google Cloud Firestore emulator using
the gcloud command-line tool.
When you run the Cloud Firestore emulator you will see a message similar to the
following printed:
If you are using a library that supports the FIRESTORE_EMULATOR_HOST
environment variable, run:
export FIRESTORE_EMULATOR_HOST=localhost:8080
Now you can connect to the emulator using the FIRESTORE_EMULATOR_HOST
environment variable:
require "google/cloud/firestore"
# Make Firestore use the emulator
ENV["FIRESTORE_EMULATOR_HOST"] = "127.0.0.1:8080"
firestore = Google::Cloud::Firestore.new project_id: "emulator-project-id"
# Get a document reference
nyc_ref = firestore.doc "cities/NYC"
nyc_ref.set({ name: "New York City" }) # Document created
Or by providing the emulator_host argument:
require "google/cloud/firestore"
firestore = Google::Cloud::Firestore.new project_id: "emulator-project-id",
emulator_host: "127.0.0.1:8080"
# Get a document reference
nyc_ref = firestore.doc "cities/NYC"
nyc_ref.set({ name: "New York City" }) # Document created