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
- Fields are type cast to the appropriate Ruby types
- ActiveRecord style 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. (Note that record() will return nil if the requested record has been deleted and not yet pruned from the database)
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| # the record will be nil if deleted and not yet pruned from the database if record puts record.last_name end 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
- DBF is read-only
- index files are not utilized
(The MIT Licence)
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