Class: RecordFilter::GroupBy

Inherits:
Object
  • Object
show all
Defined in:
lib/record_filter/group_by.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(column, table) ⇒ GroupBy

Returns a new instance of GroupBy.



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# File 'lib/record_filter/group_by.rb', line 5

def initialize(column, table)
  @column, @table = column, table
end

Instance Attribute Details

#column ⇒ Object (readonly)

Returns the value of attribute column.



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# File 'lib/record_filter/group_by.rb', line 3

def column
  @column
end

#table ⇒ Object (readonly)

Returns the value of attribute table.



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# File 'lib/record_filter/group_by.rb', line 3

def table
  @table
end

Instance Method Details

#to_sql ⇒ Object 



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# File 'lib/record_filter/group_by.rb', line 9

def to_sql
  table, column = @table, @column
  while column.is_a?(Hash)
    table = table.join_association(column.keys[0]).right_table
    column = column.values[0]
  end

  if (!table.has_column(column))
    raise ColumnNotFoundException.new("The column #{column} was not found in #{table.table_name}.")
  end

  "#{table.table_alias}.#{column}"
end