SaaS (organisations can have many members; organisation is billed)

haml devise simple_form https://github.com/scambra/devise_invitable

1. Basic multitenant +

• User can register in the application.+
• User can create many tenants.+
• When a user creates a tenant, he becomes a tenant member. +
• User can see a list of tenants where he is a member (my_tenants scope).+
• User can see only tenants where he is a member.-

1.1. Users

• Users can exist without belonging to a member or a tenant. +
• User table and user show pages exist. +

1.2. Tenants

• All tenants scope +

1.2. devise_invitable - new user, new member +

• User can invite other users to become members of a tenant via email. +
• If a user with this email exists, we check if he is a member of this tenant. If he is not, he becomes a member. +
• If a user with this email does not exist, he gets an invitation email via devise invitable + he becomes a member. +
• #Note: devise_invitable has invitation on User model. If User accepts invitation once, he accepts all of them!

1.3. devise_invitable - new user, resend invitation +

• If the user has not confirmed his email, he can be re-invited +

1.3. OPTIONAL: member of a tenant can exist without user?

• devise_invitable - new user, old member ** A user can create a member without relation to another user in a tenant. ** A user can invite another user to use the member record via email.

1.4. subdomains

• When creating a tenant, a user can type in a subdomain. +
• Subdomains have restriction (permitted names, uniqueness). + A user can edit his subdomain. + If he does not type in a subdomain, a random one is assigned. When a user select..

1.2. acts_as_tenant Current_tenant is set by session/subdomain. Members are scoped by current_tenant. All models except User and Tenant are scoped by current_tenant.

Alternative Easy way (no subdomains)

• add a tenant_id to user table.
• when a user selects a tenant, his tenant_id is updated.
• now, he sees views scoped by this tenant.

2. Billing

• rails g migration CreatePlans name:string price:integer billing_period:integer
• Tenant belongs_to plan
• #what if the app is modular and Tenant can select a lot of different billed features?
• constraints {}

3. Roles Roles are scoped by tenant. When a user creates a tenant, he becomes the tenant admin. Admin:

• Invite / delete members.
• Change member roles.
• Access to billing.
• Access to tenant settings. Moderator:
• Everything except admin. Viewer:
• Only view what moderator can do.

4. ransack, public_activity, friendly_id

find tenant by subdomain https://medium.com/@praaveen/multi-tenancy-and-sub-domain-lvh-with-rails-f364c9dc0566