We analyze the parent-child relationship (dependent relationship) on the ER diagram to see if it really is on Ruby's source.
However, I don't know how to determine which model is associated with a parent-child relationship among Ruby's sources.
Is it possible to determine the parent-child relationship using the following example?
All this tells us is whether there is a relationship and a reference between the models.
Example 1:
class HogeGroup
has_many:hoge_data,:class_name=>'HogeData',:foreign_key=>'hoge_id'
class HogeData
belongs_to:hoge_group,:class_name=>'HogeGroup',:foreign_key=>'hoge_id'
Example 2:
class TestGroup
# Has_many not listed
class TestData
belongs_to:test_group,:class_name=>'TestGroup',:foreign_key=>'test_id'
I would appreciate it if you could let me know if there is a way to analyze it on Ruby's source.
Thank you in advance.
I think you can use the reflect_on_all_associations method. You will receive an array of instances of ActiveRecord::Reflection::XXXReflection.
HogeGroup.reflect_on_all_associations(:has_many)
# = > [<ActiveRecord::Reflection::HasManyToReflection>]
HogeData.reflect_on_all_associations(:belongs_to)
# = > [<ActiveRecord::Reflection::BelongsToReflection>]
http://api.rubyonrails.org/classes/ActiveRecord/Reflection/ClassMethods.html#M001861
https://stackoverflow.com/questions/2024205/rails-method-to-get-the-association-name-of-a-model
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