Class: KSToOne

Inherits:
Object show all
Defined in:
lib/kansas/ToOne.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(*args) ⇒ KSToOne

Returns a new instance of KSToOne.



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# File 'lib/kansas/ToOne.rb', line 5

def initialize(*args)
  @localTable, @localField, @foreignTable, @foreignField = args
  @foreignField = @foreignTable.primaries.first unless @foreignField != ''
end

Instance Attribute Details

#foreignField ⇒ Object (readonly)

Returns the value of attribute foreignField.



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# File 'lib/kansas/ToOne.rb', line 3

def foreignField
  @foreignField
end

#foreignTable ⇒ Object (readonly)

Returns the value of attribute foreignTable.



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# File 'lib/kansas/ToOne.rb', line 3

def foreignTable
  @foreignTable
end

#localField ⇒ Object (readonly)

Returns the value of attribute localField.



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# File 'lib/kansas/ToOne.rb', line 3

def localField
  @localField
end

#localTable ⇒ Object (readonly)

Returns the value of attribute localTable.



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# File 'lib/kansas/ToOne.rb', line 3

def localTable
  @localTable
end

Instance Method Details

#get(parent) ⇒ Object 



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# File 'lib/kansas/ToOne.rb', line 10

def get(parent)
  if @foreignField != @foreignTable.primaries.first
    sql = "SELECT * FROM #{@foreignTable.table_name} " +
        "WHERE #{@foreignField} = '#{parent.row[@localField]}'" 
    parent.context.select(@foreignTable, sql).first
  else
    parent.context.get_object(@foreignTable, [parent.row[@localField]])
  end
end

#join ⇒ Object 



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# File 'lib/kansas/ToOne.rb', line 25

def join
  "#{@localTable.table_name}.#{@localField} = #{@foreignTable.table_name}.#{@foreignField}"
end

#set(parent, child) ⇒ Object 



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# File 'lib/kansas/ToOne.rb', line 20

def set(parent, child)
  parent.row[@localField] = child.row[@foreignField]
  parent.changed
end