14 lines
		
	
	
	
		
			411 B
		
	
	
	
		
			Ruby
		
	
	
	
	
	
			
		
		
	
	
			14 lines
		
	
	
	
		
			411 B
		
	
	
	
		
			Ruby
		
	
	
	
	
	
| # frozen_string_literal: true
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| 
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| # See also: USERNAME_RE in the Account class
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| 
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| class UniqueUsernameValidator < ActiveModel::Validator
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|   def validate(account)
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|     return if account.username.blank?
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| 
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|     scope = Account.with_username(account.username).with_domain(account.domain)
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|     scope = scope.where.not(id: account.id) if account.persisted?
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| 
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|     account.errors.add(:username, :taken) if scope.exists?
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|   end
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| end
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