Class: CollectionAdapters::ArraySequel

Inherits:
Object
  • Object
show all
Defined in:
lib/collectionadapters/array_sequel.rb

Instance Method Summary collapse

Constructor Details

#initialize(model:, column:) ⇒ ArraySequel

Returns a new instance of ArraySequel.



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# File 'lib/collectionadapters/array_sequel.rb', line 3

def initialize model:, column:
  @model = model
  @col   = column.to_sym
end

Instance Method Details

#<<(val) ⇒ Object 



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# File 'lib/collectionadapters/array_sequel.rb', line 8

def << val
  @model.new.set(@col => val).save
rescue Sequel::UniqueConstraintViolation
  nil
end

#concat(other) ⇒ Object 



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# File 'lib/collectionadapters/array_sequel.rb', line 18

def concat other
  other.each {|v| self << v }
end

#count ⇒ Object 



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# File 'lib/collectionadapters/array_sequel.rb', line 14

def count
  @model.count
end

#include?(key) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/collectionadapters/array_sequel.rb', line 22

def include? key
  @model[@col => key] != nil
end

#shift ⇒ Object 



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# File 'lib/collectionadapters/array_sequel.rb', line 26

def shift
  @model.db.transaction do
    if ob = @model.for_update.first
      v  = ob.values[@col]
      return v if ob.delete
      raise Sequel::rollback
    end
  end
  nil
end