Module: Composable::Tenant::ModelExtensions::ClassMethods

Defined in:
lib/composable/tenant/model_extensions.rb

Instance Method Summary collapse

Instance Method Details

#tenant(tenant, scope = nil, **options) ⇒ Object 



20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
 
# File 'lib/composable/tenant/model_extensions.rb', line 20

def tenant(tenant, scope = nil, **options)
  # Create the association
  foreign_key = options.fetch(:foreign_key, "#{tenant}_id").to_sym
  primary_key = options.fetch(:primary_key, :id).to_sym

  # The association will not have its presence validated.
  # This is because the tenant is set by the tenant= method,
  # which is called by the before_validation callback. Prevents extra query.
  options[:optional] = true if options[:optional].nil?

  belongs_to tenant, scope, **options

  default_scope lambda {
    return if Composable::Tenant::DataSet.excluded_tenants.include?(tenant.to_sym)
    raise Composable::Tenant::NoTenantSet.new(tenant: tenant) unless Composable::Tenant::DataSet.tenant(tenant)

    where(foreign_key => Composable::Tenant::DataSet.tenant(tenant).send(primary_key))
  }, all_queries: true

  # Makes sure new instances have tenant set
  before_validation lambda { |record|
    return if Composable::Tenant::DataSet.excluded_tenants.include?(tenant.to_sym)

    record.send("#{foreign_key}=", Composable::Tenant::DataSet.tenant(tenant).send(primary_key))
  }, on: :create

  # Rewrite the accessors to make tenant immutable
  to_include = Module.new do
    define_method "#{foreign_key}=" do |integer|
      write_attribute(foreign_key, integer)
      raise Composable::Tenant::TenantIsImmutable.new(method_name: "#{foreign_key}=") if send("#{foreign_key}_changed?") &&
        persisted? &&
        !send("#{foreign_key}_was").nil?

      integer
    end

    define_method "#{tenant}=" do |model|
      super(model)
      raise Composable::Tenant::TenantIsImmutable.new(method_name: "#{tenant}=") if send("#{foreign_key}_changed?") &&
        persisted? &&
        !send("#{foreign_key}_was").nil?

      model
    end
  end

  include to_include
end