Signing In a User Automatically after Sign Up

Before you start

You need a sign-up form that posts an email and a password to a page you control. For building the form itself, see Creating a Sign-Up Form.

Step 1: Create the user

Create the user with the user_create mutation and ask for its id back.

app/graphql/users/create.graphql

mutation create_user($email: String!, $password: String!) {
  user: user_create(user: { email: $email, password: $password }) {
    id
    email
  }
}

Step 2: Sign the user in

In the page that handles the sign-up POST, run the mutation. If it succeeds, pass the new user's id to the sign_in tag.

app/views/pages/sign-up.liquid

---
slug: sign-up
method: post
---
{% liquid
  graphql result = 'users/create', email: context.params.email, password: context.params.password
  if result.errors
    # show the form again with the error
    break
  endif

  sign_in user_id: result.user.id
  redirect_to '/'
%}

sign_in also accepts timeout_in_minutes, for example {% sign_in user_id: result.user.id, timeout_in_minutes: 120 %}.

Things to know

• After sign_in, context.current_user holds the new user for the rest of the request and on later requests.
• Signing in issues a new session cookie. The cookie from before sign-in no longer works.
• There is a sign_in tag but no sign_out tag.
• sign_in with an empty user id raises an error and leaves the current session as it was.

See the sign_in entry in Insites Liquid Tags.