Add Classifications and Resource validations

- Turn `has_and_belongs_to_many` into `has_many :through`: now,
resources and sections are related through Classifications.
- Refactor usage of jsonb column to use ActiveRecord validations
- Attention! store_accessor:

NOTE: If you are using structured database data types (eg. PostgreSQL hstore/json, or MySQL 5.7+ json) there is no need for the
serialization provided by .store. Simply use .store_accessor instead to generate the accessor methods. Be aware that these
columns use a string keyed hash and do not allow access using a symbol.

NOTE: The default validations with the exception of uniqueness will work. For example, if you want to check for uniqueness with
hstore you will need to use a custom validation to handle it.

https://api.rubyonrails.org/classes/ActiveRecord/Store.html

1 files changed, 11 insertions, 0 deletions

diff --git a/app/models/agent.rb b/app/models/agent.rb
index 07e0b8e..6264ba3 100644
--- a/app/models/agent.rb
+++ b/app/models/agent.rb
@@ -2,4 +2,15 @@ class Agent < ApplicationRecord
   has_many :agencies
   has_many :members, through: :agencies, source: :user
   has_many :resources
+  has_many :taxonomies
+  has_many :categories, through: :taxonomies
+  has_many :sections, through: :categories
+
+  def to_param
+    uuid
+  end
+
+  def to_s
+    name
+  end
 end