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| create_table :users, id: false do |t| | |
| t.uuid :id, primary: true, null: false | |
| # ... | |
| end |
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| require 'uuid' | |
| module UUIDPrimaryKey | |
| extend ActiveSupport::Concern | |
| included do |klass| | |
| klass.primary_key = :id | |
| klass.before_create do | |
| self.id = UUID.generate | |
| end | |
| end | |
| end |
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