This class encapsulates a result returned from calling #exec_query on any database connection adapter. For example:

result = ActiveRecord::Base.connection.exec_query('SELECT id, title, body FROM posts')
result # => #<ActiveRecord::Result:0xdeadbeef>

# Get the column names of the result:
result.columns
# => ["id", "title", "body"]

# Get the record values of the result:
result.rows
# => [[1, "title_1", "body_1"],
      [2, "title_2", "body_2"],
      ...
     ]

# Get an array of hashes representing the result (column => value):
result.to_hash
# => [{"id" => 1, "title" => "title_1", "body" => "body_1"},
      {"id" => 2, "title" => "title_2", "body" => "body_2"},
      ...
     ]

# ActiveRecord::Result also includes Enumerable.
result.each do |row|
  puts row['title'] + " " + row['body']
end

Methods

Included Modules

Attributes

[R] column_types
[R] columns
[R] rows

Class Public methods

new(columns, rows, column_types = {})

📝 Source code 
# File activerecord/lib/active_record/result.rb, line 39
    def initialize(columns, rows, column_types = {})
      @columns      = columns
      @rows         = rows
      @hash_rows    = nil
      @column_types = column_types
    end
🔎 See on GitHub

Instance Public methods

[](idx)

📝 Source code 
# File activerecord/lib/active_record/result.rb, line 81
    def [](idx)
      hash_rows[idx]
    end
🔎 See on GitHub

each()

Calls the given block once for each element in row collection, passing row as parameter.

Returns an Enumerator if no block is given.

📝 Source code 
# File activerecord/lib/active_record/result.rb, line 55
    def each
      if block_given?
        hash_rows.each { |row| yield row }
      else
        hash_rows.to_enum { @rows.size }
      end
    end
🔎 See on GitHub

empty?()

Returns true if there are no records, otherwise false.

📝 Source code 
# File activerecord/lib/active_record/result.rb, line 72
    def empty?
      rows.empty?
    end
🔎 See on GitHub

first()

Returns the first record from the rows collection. If the rows collection is empty, returns nil.

📝 Source code 
# File activerecord/lib/active_record/result.rb, line 87
    def first
      return nil if @rows.empty?
      Hash[@columns.zip(@rows.first)]
    end
🔎 See on GitHub

initialize_copy(other)

📝 Source code 
# File activerecord/lib/active_record/result.rb, line 108
    def initialize_copy(other)
      @columns      = columns.dup
      @rows         = rows.dup
      @column_types = column_types.dup
      @hash_rows    = nil
    end
🔎 See on GitHub

last()

Returns the last record from the rows collection. If the rows collection is empty, returns nil.

📝 Source code 
# File activerecord/lib/active_record/result.rb, line 94
    def last
      return nil if @rows.empty?
      Hash[@columns.zip(@rows.last)]
    end
🔎 See on GitHub

length()

Returns the number of elements in the rows array.

📝 Source code 
# File activerecord/lib/active_record/result.rb, line 47
    def length
      @rows.length
    end
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to_ary()

Returns an array of hashes representing each row record.

📝 Source code 
# File activerecord/lib/active_record/result.rb, line 77
    def to_ary
      hash_rows
    end
🔎 See on GitHub

to_hash()

Returns an array of hashes representing each row record.

📝 Source code 
# File activerecord/lib/active_record/result.rb, line 64
    def to_hash
      hash_rows
    end
🔎 See on GitHub