Module: Milia::Base::ClassMethods

Defined in:
lib/milia/base.rb

Overview

############################################################################# #############################################################################

Instance Method Summary collapse

Instance Method Details

#acts_as_tenant ⇒ Object

acts_as_tenant – makes a tenanted model Forces all references to be limited to current_tenant rows



16
17
18
19
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
 
# File 'lib/milia/base.rb', line 16

def acts_as_tenant()
  attr_protected :tenant_id
  belongs_to  :tenant
  validates_presence_of :tenant_id

  default_scope lambda { where( "#{table_name}.tenant_id = ?", Thread.current[:tenant_id] ) }

# ..........................callback enforcers............................
  before_validation(:on => :create) do |obj|   # force tenant_id to be correct for current_user
    obj.tenant_id = Thread.current[:tenant_id]
    true  #  ok to proceed
  end

# ..........................callback enforcers............................
  before_save do |obj|   # force tenant_id to be correct for current_user
    obj.tenant_id = Thread.current[:tenant_id]
    true  #  ok to proceed
  end

# ..........................callback enforcers............................
  before_update do |obj|   # force tenant_id to be correct for current_user
    raise ::Control::InvalidTenantAccess unless obj.tenant_id == Thread.current[:tenant_id]
    true  #  ok to proceed
  end

# ..........................callback enforcers............................
  before_destroy do |obj|   # force tenant_id to be correct for current_user
    raise ::Control::InvalidTenantAccess unless obj.tenant_id == Thread.current[:tenant_id]
    true  #  ok to proceed
  end

end

#acts_as_universal ⇒ Object

acts_as_universal – makes a univeral (non-tenanted) model Forces all reference to the universal tenant (nil)



53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
 
# File 'lib/milia/base.rb', line 53

def acts_as_universal()
  attr_protected :tenant_id
  belongs_to  :tenant

  default_scope where( "#{table_name}.tenant_id IS NULL" )

# ..........................callback enforcers............................
  before_save do |obj|   # force tenant_id to be universal
    raise ::Control::InvalidTenantAccess unless obj.tenant_id.nil?
    true  #  ok to proceed
  end

# ..........................callback enforcers............................
  before_update do |obj|   # force tenant_id to be universal
    raise ::Control::InvalidTenantAccess unless obj.tenant_id.nil?
    true  #  ok to proceed
  end

# ..........................callback enforcers............................
  before_destroy do |obj|   # force tenant_id to be universal
    raise ::Control::InvalidTenantAccess unless obj.tenant_id.nil?
    true  #  ok to proceed
  end

end

#acts_as_universal_and_determines_account ⇒ Object

acts_as_universal_and_determines_tenant_reference All the characteristics of acts_as_universal AND also does the magic of binding a user to a tenant



84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
 
# File 'lib/milia/base.rb', line 84

def ()
  has_and_belongs_to_many :tenants

  acts_as_universal()
  
    # before create, tie user with current tenant
    # return true if ok to proceed; false if break callback chain
  after_create do |new_user|
    tenant = Tenant.find( Thread.current[:tenant_id] )
    unless tenant.users.include?(new_user)
      tenant.users << new_user  # add user to this tenant if not already there
    end

  end # before_create do
  
  before_destroy do |old_user|
    old_user.tenants.clear    # remove all tenants for this user
    true
  end # before_destroy do
  
end

#acts_as_universal_and_determines_tenant ⇒ Object 



108
109
110
111
112
113
114
115
116
117
 
# File 'lib/milia/base.rb', line 108

def acts_as_universal_and_determines_tenant()
  has_and_belongs_to_many :users

  acts_as_universal()
  
  before_destroy do |old_tenant|
    old_tenant.users.clear  # remove all users from this tenant
    true
  end # before_destroy do
end

#current_tenant ⇒ Object

current_tenant – returns tenant obj for current tenant



122
123
124
 
# File 'lib/milia/base.rb', line 122

def current_tenant()
  return Tenant.find( Thread.current[:tenant_id] )
end

#current_tenant_id ⇒ Object

current_tenant_id – returns tenant_id for current tenant



129
130
131
 
# File 'lib/milia/base.rb', line 129

def current_tenant_id()
  return Thread.current[:tenant_id]
end

#set_current_tenant(tenant) ⇒ Object

set_current_tenant – model-level ability to set the current tenant NOTE: *USE WITH CAUTION* normally this should NEVER be done from the models … it’s only useful and safe WHEN performed at the start of a background job (DelayedJob#perform)



139
140
141
142
143
144
145
146
147
148
149
 
# File 'lib/milia/base.rb', line 139

def set_current_tenant( tenant )
    # able to handle tenant obj or tenant_id
  case tenant
    when Tenant then tenant_id = tenant.id
    when Integer then tenant_id = tenant
    else
      raise ArgumentError, "invalid tenant object or id"
  end  # case
  
  Thread.current[:tenant_id] = tenant_id
end

#where_restrict_tenant(*args) ⇒ Object

where_restrict_tenant – gens tenant restrictive where clause for each klass NOTE: subordinate join tables will not get the default scope by Rails theoretically, the default scope on the master table alone should be sufficient in restricting answers to the current_tenant alone .. HOWEVER, it doesn’t feel right. adding an additional .where( where_restrict_tenants(klass1, klass2,…)) for each of the subordinate models in the join seems like a nice safety issue.



161
162
163
 
# File 'lib/milia/base.rb', line 161

def where_restrict_tenant(*args)
  args.map{|klass| "#{klass.table_name}.tenant_id = #{Thread.current[:tenant_id]}"}.join(" AND ")
end