Module: Tablesmith::HashRowsBase

Included in:
ActiveRecordSource, HashRowsSource
Defined in:
lib/tablesmith/hash_rows_base.rb

Overview

ActiveRecord and HashRowsSource share a lot, but not everything.

Instance Method Summary collapse

Instance Method Details

#create_headers(rows) ⇒ Object 



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# File 'lib/tablesmith/hash_rows_base.rb', line 31

def create_headers(rows)
  column_names = rows.first.map(&:first)
  grouped_headers(column_names) + [apply_column_aliases(column_names), :separator]
end

#normalize_keys(rows) ⇒ Object

not all resulting rows will have data in all columns, so make sure all rows pad out missing columns



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# File 'lib/tablesmith/hash_rows_base.rb', line 4

def normalize_keys(rows)
  all_keys = rows.map(&:keys).flatten.uniq
  rows.map { |hash_row| all_keys.each { |key| hash_row[key] ||= '' } }
end

#row_values(row) ⇒ Object 



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# File 'lib/tablesmith/hash_rows_base.rb', line 27

def row_values(row)
  row.map(&:last)
end

#sort_columns(rows) ⇒ Object 



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# File 'lib/tablesmith/hash_rows_base.rb', line 9

def sort_columns(rows)
  return if column_order.empty?
  rows.map! do |row|
    # this sort gives preference to column_order then falls back to alphabetic for leftovers.
    # this is handy when columns auto-generate based on hash data.
    row.sort do |a, b|
      a_col_name, b_col_name = [a.first, b.first]
      a_col_index, b_col_index = [column_order.index(a_col_name), column_order.index(b_col_name)]

      if a_col_index.nil? && b_col_index.nil?
        a_col_name <=> b_col_name
      else
        (a_col_index || 999) <=> (b_col_index || 999)
      end
    end
  end
end