class ActiveRecord::Result

Experimental RBS support (using type sampling data from the type_fusion project). 

# sig/active_record/result.rbs

class ActiveRecord::Result
  def includes_column?: (String name) -> untyped
  def initialize_copy: (ActiveRecord::Result other) -> nil
end

end
puts row + “ ” + row[‘body’]
result.each do |row|
# ActiveRecord::Result also includes Enumerable.
]
…
{“id” => 2, “title” => “title_2”, “body” => “body_2”},
# => [{“id” => 1, “title” => “title_1”, “body” => “body_1”},
result.to_a
# Get an array of hashes representing the result (column => value):
]
…
[2, “title_2”, “body_2”],
# => [[1, “title_1”, “body_1”],
result.rows
# Get the record values of the result:
# => [“id”, “title”, “body”]
result.columns
# Get the column names of the result:
result # => #<ActiveRecord::Result:0xdeadbeef>
result = ActiveRecord::Base.connection.exec_query(‘SELECT id, title, body FROM posts’)
on any database connection adapter. For example:
This class encapsulates a result returned from calling
##

def self.empty # :nodoc:

:nodoc: 
def self.empty # :nodoc:
  EMPTY
end

def [](idx) 

def [](idx)
  hash_rows[idx]
end

def cancel # :nodoc:

:nodoc: 
def cancel # :nodoc:
  self
end

def cast_values(type_overrides = {}) # :nodoc:

:nodoc: 
def cast_values(type_overrides = {}) # :nodoc:
  if columns.one?
    # Separated to avoid allocating an array per row
    type = if type_overrides.is_a?(Array)
      type_overrides.first
    else
      column_type(columns.first, type_overrides)
    end
    rows.map do |(value)|
      type.deserialize(value)
    end
  else
    types = if type_overrides.is_a?(Array)
      type_overrides
    else
      columns.map { |name| column_type(name, type_overrides) }
    end
    rows.map do |values|
      Array.new(values.size) { |i| types[i].deserialize(values[i]) }
    end
  end
end

def column_type(name, type_overrides = {}) 

def column_type(name, type_overrides = {})
  type_overrides.fetch(name) do
    column_types.fetch(name, Type.default_value)
  end
end

def each(&block)

Returns an +Enumerator+ if no block is given.

row as parameter.
Calls the given block once for each element in row collection, passing 
def each(&block)
  if block_given?
    hash_rows.each(&block)
  else
    hash_rows.to_enum { @rows.size }
  end
end

def empty?

Returns true if there are no records, otherwise false. 
def empty?
  rows.empty?
end

def hash_rows 

def hash_rows
  @hash_rows ||=
    begin
      # We freeze the strings to prevent them getting duped when
      # used as keys in ActiveRecord::Base's @attributes hash
      columns = @columns.map(&:-@)
      length  = columns.length
      template = nil
      @rows.map { |row|
        if template
          # We use transform_values to build subsequent rows from the
          # hash of the first row. This is faster because we avoid any
          # reallocs and in Ruby 2.7+ avoid hashing entirely.
          index = -1
          template.transform_values do
            row[index += 1]
          end
        else
          # In the past we used Hash[columns.zip(row)]
          #  though elegant, the verbose way is much more efficient
          #  both time and memory wise cause it avoids a big array allocation
          #  this method is called a lot and needs to be micro optimised
          hash = {}
          index = 0
          while index < length
            hash[columns[index]] = row[index]
            index += 1
          end
          # It's possible to select the same column twice, in which case
          # we can't use a template
          template = hash if hash.length == length
          hash
        end
      }
    end
end

def includes_column?(name)

Experimental RBS support (using type sampling data from the type_fusion project). 

def includes_column?: (String name) -> untyped

This signature was generated using 1 sample from 1 application.

Returns true if this result set includes the column named +name+ 
def includes_column?(name)
  @columns.include? name
end

def initialize(columns, rows, column_types = {}) 

def initialize(columns, rows, column_types = {})
  @columns      = columns
  @rows         = rows
  @hash_rows    = nil
  @column_types = column_types
end

def initialize_copy(other)

Experimental RBS support (using type sampling data from the type_fusion project). 

def initialize_copy: (ActiveRecord::Result other) -> nil

This signature was generated using 3 samples from 1 application. 

def initialize_copy(other)
  @columns      = columns.dup
  @rows         = rows.dup
  @column_types = column_types.dup
  @hash_rows    = nil
end

def last(n = nil)

Returns the last record from the rows collection. 
def last(n = nil)
  n ? hash_rows.last(n) : hash_rows.last
end

def length

Returns the number of elements in the rows array. 
def length
  @rows.length
end

def result # :nodoc:

:nodoc: 
def result # :nodoc:
  self
end

def to_ary

Returns an array of hashes representing each row record. 
def to_ary
  hash_rows
end