Class: ActiveRecord::SchemaDumper

Inherits:
Object
  • Object
show all
Defined in:
lib/core_ext/active_record/schema_dumper.rb

Overview

Patched version: 3.1.3

Patched methods

  • indexes

Instance Method Summary collapse

Instance Method Details

#indexes(table, stream) ⇒ Object

Writes out index-related details to the schema stream

Patch reason:

#indexes does not support writing out details related to partial indexes.

Patch:

Append :where clause if there’s a partial index



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# File 'lib/core_ext/active_record/schema_dumper.rb', line 15

def indexes(table, stream)
  if (indexes = @connection.indexes(table)).any?
    add_index_statements = indexes.map do |index|
      columns = index.columns.map do |column_name|
        column_name += ' ' +index.operators[column_name] if index.operators.key?(column_name)

        column_name
      end

      is_json_index = (columns.count == 1 && columns.first =~ /^(.+->.+)$/)

      statement_parts = [
        ('add_index ' + index.table.inspect),
        is_json_index ? "\"#{columns.first}\"" : columns.inspect,
        (':name => ' + index.name.inspect),
      ]
      statement_parts << ':unique => true' if index.unique

      index_lengths = (index.lengths || []).compact
      statement_parts << (':length => ' + Hash[index.columns.zip(index.lengths)].inspect) unless index_lengths.empty?

      # Patch
      #  Append :where clause if a partial index
      statement_parts << (':where => ' + index.where.inspect) if index.where

      statement_parts << (':using => ' + index.access_method.inspect) unless index.access_method.downcase == 'btree'

      statement_parts << ':skip_column_quoting => true' if is_json_index

      '  ' + statement_parts.join(', ')
    end

    stream.puts add_index_statements.sort.join("\n")
    stream.puts
  end
end