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Brian J. Cardiff 611eec5aed
Merge pull request #43 from crystal-lang/crystal/v0.30.0
Upgrade to Crystal v0.30.0
2019-08-02 12:25:30 -03:00
samples Use text instead of string as sqlite type 2017-11-13 10:59:59 -03:00
spec Code cleanup due to Crystal >= 0.28.0 2019-06-06 12:36:16 -03:00
src Upgrade to Crystal v0.30.0 2019-07-30 19:17:12 -03:00
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CHANGELOG.md Release 0.12.0 (#41) 2019-06-07 10:23:14 -03:00
LICENSE add license 2016-06-24 00:02:44 -03:00
README.md Use text instead of string as sqlite type 2017-11-13 10:59:59 -03:00
shard.yml Update to crystal-db ~> 0.6.0 2019-08-02 12:21:40 -03:00

crystal-sqlite3 Build Status

SQLite3 bindings for Crystal.

Check crystal-db for general db driver documentation. crystal-sqlite3 driver is registered under sqlite3:// uri.

Installation

Add this to your application's shard.yml:

dependencies:
  sqlite3:
    github: crystal-lang/crystal-sqlite3

Usage

require "sqlite3"

DB.open "sqlite3://./data.db" do |db|
  db.exec "create table contacts (name text, age integer)"
  db.exec "insert into contacts values (?, ?)", "John Doe", 30

  args = [] of DB::Any
  args << "Sarah"
  args << 33
  db.exec "insert into contacts values (?, ?)", args

  puts "max age:"
  puts db.scalar "select max(age) from contacts" # => 33

  puts "contacts:"
  db.query "select name, age from contacts order by age desc" do |rs|
    puts "#{rs.column_name(0)} (#{rs.column_name(1)})"
    # => name (age)
    rs.each do
      puts "#{rs.read(String)} (#{rs.read(Int32)})"
      # => Sarah (33)
      # => John Doe (30)
    end
  end
end

DB::Any

  • Time is implemented as TEXT column using SQLite3::DATE_FORMAT format.
  • Bool is implemented as INT column mapping 0/1 values.