DBF is a small fast library for reading dBase, xBase, Clipper and FoxPro database files
- Project page: http://github.com/infused/dbf
- API Documentation: http://rdoc.info/projects/infused/dbf
- Report bugs: http://github.com/infused/dbf/issues
- Questions: Email email@example.com and put DBF somewhere in the subject line
- No external dependencies
- Fields are type cast to the appropriate Ruby types
- ActiveRecord like finder methods
- Ability to dump the database schema in the portable ActiveRecord::Schema format
- Ruby 1.9.1 compatible
gem install dbf
Load a DBF file:
require 'rubygems' require 'dbf' table = DBF::Table.new("widgets.dbf")
Enumerate all records
table.each do |record| puts record.name puts record.email end
Load a single record using record or find
Attributes can also be accessed through the attributes hash in original or underscored form or as an accessor method using the underscored name.
table.record(4).attributes["PhoneBook"] table.record(4).attributes["phone_book"] table.record(4).phone_book
Search for records using a simple hash format. Multiple search criteria are ANDed. Use the block form of find if the resulting recordset could be large otherwise all records will be loaded into memory.
# find all records with first_name equal to Keith table.find(:all, :first_name => 'Keith') do |record| puts record.last_name end # find all records with first_name equal to Keith and last_name equal # to Morrison table.find(:all, :first_name => 'Keith', :last_name => 'Morrison') do |record| puts record.last_name end # find the first record with first_name equal to Keith table.find :first, :first_name => 'Keith' # find record number 10 table.find(10)
Migrating to ActiveRecord
An example of migrating a DBF book table to ActiveRecord using a migration:
require 'dbf' class CreateBooks < ActiveRecord::Migration def self.up table = DBF::Table.new('db/dbf/books.dbf') eval(table.schema) table.each do |record| Book.create(record.attributes) end end def self.down drop_table :books end end
A small command-line utility called dbf is installed along with the gem.
$ dbf -h usage: dbf [-h|-s|-a] filename -h = print this message -s = print summary information -a = create an ActiveRecord::Schema
Limitations and known bugs
- DBF is read-only
- External index files are not used
(The MIT Licence)
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.