Class: LolDba::RelationInspector

Inherits:
Object
  • Object
show all
Defined in:
lib/lol_dba/index_finding/relation_inspector.rb

Direct Known Subclasses

BelongsTo, HasAndBelongsToMany, HasMany

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(model_class, reflection_options, reflection_name) ⇒ RelationInspector

Returns a new instance of RelationInspector.



5
6
7
8
9
 
# File 'lib/lol_dba/index_finding/relation_inspector.rb', line 5

def initialize(model_class, reflection_options, reflection_name)
  @model_class = model_class
  @reflection_options = reflection_options
  @reflection_name = reflection_name
end

Instance Attribute Details

#model_class ⇒ Object (readonly)

Returns the value of attribute model_class.



3
4
5
 
# File 'lib/lol_dba/index_finding/relation_inspector.rb', line 3

def model_class
  @model_class
end

#reflection_name ⇒ Object (readonly)

Returns the value of attribute reflection_name.



3
4
5
 
# File 'lib/lol_dba/index_finding/relation_inspector.rb', line 3

def reflection_name
  @reflection_name
end

#reflection_options ⇒ Object (readonly)

Returns the value of attribute reflection_options.



3
4
5
 
# File 'lib/lol_dba/index_finding/relation_inspector.rb', line 3

def reflection_options
  @reflection_options
end

Instance Method Details

#get_through_foreign_key(target_class, reflection_options) ⇒ Object 



11
12
13
14
15
16
17
18
19
20
21
22
23
24
 
# File 'lib/lol_dba/index_finding/relation_inspector.rb', line 11

def get_through_foreign_key(target_class, reflection_options)
  # has_many :through
  reflection = target_class.reflections[reflection_options.options[:through].to_s]

  # has_and_belongs_to_many
  reflection ||= reflection_options

  # Guess foreign key?
  if reflection.options[:foreign_key]
    reflection.options[:foreign_key]
  else
    "#{target_class.name.tableize.singularize}_id"
  end
end

#reflections ⇒ Object 



26
27
28
 
# File 'lib/lol_dba/index_finding/relation_inspector.rb', line 26

def reflections
  model_class.reflections.stringify_keys
end