RubyDoc.info: File: README – Documentation for maiha-record_dumper (0.1)

RecordDumper

Dumps ActiveRecord data with various formats.

Syntax

ActiveRecord::Base#record_dumper(options = {})

Usage

default format

The default format is ‘create!’. Just call ‘record_dumper’ method.

user = User.new(:name => 'maiha', :age => 14)
puts user.record_dumper.to_s

# =>
User.create!(
  :id   => nil,
  :name => "maiha",
  :age  => 14
)

other formats (create, save, save!)

Send the method directly to record_dumper object.

user = User.new(:name => 'maiha', :age => 14)
puts user.record_dumper.save.to_s

# =>
record = User.new
record[:id]   = nil
record[:name] = "maiha"
record[:age]  = 14
record.save

SQL format

user = User.new(:name => 'maiha', :age => 14)
puts user.record_dumper.sql.to_s

# =>
INSERT INTO users VALUES (
NULL,
'maiha',
14
);

with :delimiter option

Use :delimiter option as you like if you don’t want line breaks.

user = User.new(:name => 'maiha', :age => 14)
puts user.record_dumper(:delimiter=>'').sql.to_s

# =>
INSERT INTO users VALUES (NULL, 'maiha',14);

with :dependent option

You can get all associated records by using :dependent option.

class User < ActiveRecord::Base
  has_one :address
end

user = User.create!(:name=>"maiha", :age=>14)
user.create_address(:city=>"Tokyo", :address=>"Akihabara")
puts user.record_dumper(:dependent=>true).sql.to_s

# =>
User.create!(
  :id   => nil,
  :name => "maiha",
  :age  => 14
)

Address.create!(
  :id      => 1,
  :city    => "Tokyo",
  :address => "Akihabara",
  :user_id => 1
)

Enhancement

If you want your own format, create subclass of RecordDumper::Base and define ‘record’ method in it.

class TableTr < ActiveRecord::RecordDumper::Base
  def column(col, val)
      "<td>#{val}</td>"
  end

  def record
    "<tr>%s</tr>" % columns.join
  end
end
ActiveRecord::RecordDumper.reload   # don't forget this to enable new classes

user = User.new(:name => 'maiha', :age => 14)
puts user.record_dumper.table_tr.to_s

# =>
<tr><td></td><td>maiha</td><td>14</td></tr>